{
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    "observations": 80,
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    "new_observations": 34,
    "bioactivity_only_profiles": 21,
    "exact_PWWP_structural_profiles": 130,
    "verified_depictions": 139,
    "reconciled_duplicate_rows": 0,
    "candidate_records": 150,
    "curated_scope": "Documented targeted snapshot; not an exhaustive inventory of all literature compounds. Coordinate proximity and assay measurements are independent evidence dimensions."
  },
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    "bound": "",
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  "compounds": [
    {
      "aliases": [
        "BI-9321",
        "[4-[5-(7-fluoranylquinolin-4-yl)-1-methyl-imidazol-4-yl]-3,5-dimethyl-phenyl]methanamine"
      ],
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      "associated_pdb_ids": [
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      ],
      "bound_structure_count": 1,
      "category": "Bioactivity + bound structure",
      "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
      "classifications": [
        "Reported chemical probe"
      ],
      "compound_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
      "curation_version": "phase5-1.0.0",
      "depiction": {
        "calculated_HBA": 4,
        "calculated_HBD": 1,
        "calculated_TPSA": 56.73,
        "calculated_formula": "C22H21FN4",
        "calculated_logP": 4.5169,
        "calculated_molecular_weight": 360.436,
        "computed_inchikey": "WOAOENGFAAUUGT-UHFFFAOYSA-N",
        "descriptor_scope": "RDKit calculation for the source identity; not an experimental measurement",
        "files": {
          "dark": "b3b05180c8514008d5a1-dark.svg",
          "light": "b3b05180c8514008d5a1-light.svg"
        },
        "rdkit_version": "2025.09.3",
        "status": "verified_smiles_full_inchikey_match"
      },
      "development_status": "Not independently curated",
      "domain_ids": [
        "UP:Q9BZ95:PWWP1"
      ],
      "entity_kind": "chemical_identity",
      "genes": [
        "NSD3"
      ],
      "has_bioactivity_only": false,
      "has_source_conflict": true,
      "identity": {
        "aliases": [
          "[4-[5-(7-fluoranylquinolin-4-yl)-1-methyl-imidazol-4-yl]-3,5-dimethyl-phenyl]methanamine"
        ],
        "ccd_ids": [
          "EJE"
        ],
        "ccd_names": "[\"[4-[5-(7-fluoranylquinolin-4-yl)-1-methyl-imidazol-4-yl]-3,5-dimethyl-phenyl]methanamine\"]",
        "ccd_types": "[\"non-polymer\"]",
        "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
        "connectivity_block": "WOAOENGFAAUUGT",
        "curated_source_sha256": null,
        "curation_version": "frozen-v1.2",
        "external_identifiers": {},
        "formal_charge_by_ccd": "{\"EJE\": 0}",
        "formulae": "[\"C22 H21 F N4\"]",
        "geometry_note": "CCD ideal SDF is a reference chemical geometry, not a deposited bound pose.",
        "identity_status": "complete_deposited_InChIKey",
        "inchikey": "WOAOENGFAAUUGT-UHFFFAOYSA-N",
        "inventory_origin": "v1_CCD_inventory",
        "isomeric_smiles": "Cc1cc(cc(c1c2c(n(cn2)C)c3ccnc4c3ccc(c4)F)C)CN",
        "primary_name": "[4-[5-(7-fluoranylquinolin-4-yl)-1-methyl-imidazol-4-yl]-3,5-dimethyl-phenyl]methanamine",
        "retrieval_date": "2026-10-24",
        "smiles_stereo_by_ccd": "{\"EJE\": \"Cc1cc(cc(c1c2c(n(cn2)C)c3ccnc4c3ccc(c4)F)C)CN\"}",
        "source_metadata_sha256": "{\"EJE\": \"4420a58e1e2dc7985843e11811dec4d72c963f256b3f66eda18bde5db1f66e3c\"}",
        "source_urls": [
          "https://www.rcsb.org/ligand/EJE"
        ]
      },
      "identity_note": "Complete deposited identity retained; no connectivity-only or name-only merge.",
      "identity_resolved": true,
      "is_control": false,
      "is_probe": true,
      "measured_observation_count": 3,
      "name": "BI-9321",
      "negative_count": 0,
      "observation_ids": [
        "PWWP:ASSAY:0008",
        "PWWP:ASSAY:0009",
        "PWWP5:ASSAY:0001"
      ],
      "pdb_structure_count": 1,
      "preparation_count": 1,
      "preparation_ids": [
        "PREP:BI-9321"
      ],
      "protein_ids": [
        "UP:Q9BZ95"
      ],
      "relationships": [
        {
          "direction": "inverse",
          "object_id": "INCHIKEY:SFZHMKDAVPIXRB-UHFFFAOYSA-N",
          "object_preparation_id": "PREP:BI-9321",
          "original_object_id": "PREP:BI-9321",
          "original_subject_id": "PREP:BI-9466",
          "predicate": "negative_control_for",
          "relationship": "has negative control for",
          "relationship_id": "P5:REL:BI-9466",
          "retrieval_date": "2026-10-26",
          "scope": "weaker NSD3-PWWP1 antagonist control",
          "source_id": "P5:S:SGC_BI9321",
          "source_url": "https://www.thesgc.org/chemical-probes/bi-9321",
          "subject_id": "INCHIKEY:SFZHMKDAVPIXRB-UHFFFAOYSA-N",
          "subject_preparation_id": "PREP:BI-9466",
          "version": "phase5.chemical_curation.1.1.0"
        }
      ],
      "relevant": true,
      "search_text": "bi-9321 inchikey:woaoengfaauugt-uhfffaoysa-n bi-9321 [4-[5-(7-fluoranylquinolin-4-yl)-1-methyl-imidazol-4-yl]-3,5-dimethyl-phenyl]methanamine nsd3 up:q9bz95:pwwp1 6g2o {\"aliases\":[\"[4-[5-(7-fluoranylquinolin-4-yl)-1-methyl-imidazol-4-yl]-3,5-dimethyl-phenyl]methanamine\"],\"ccd_ids\":[\"eje\"],\"ccd_names\":\"[\\\"[4-[5-(7-fluoranylquinolin-4-yl)-1-methyl-imidazol-4-yl]-3,5-dimethyl-phenyl]methanamine\\\"]\",\"ccd_types\":\"[\\\"non-polymer\\\"]\",\"chemical_id\":\"inchikey:woaoengfaauugt-uhfffaoysa-n\",\"connectivity_block\":\"woaoengfaauugt\",\"curated_source_sha256\":null,\"curation_version\":\"frozen-v1.2\",\"external_identifiers\":{},\"formal_charge_by_ccd\":\"{\\\"eje\\\": 0}\",\"formulae\":\"[\\\"c22 h21 f n4\\\"]\",\"geometry_note\":\"ccd ideal sdf is a reference chemical geometry, not a deposited bound pose.\",\"identity_status\":\"complete_deposited_inchikey\",\"inchikey\":\"woaoengfaauugt-uhfffaoysa-n\",\"inventory_origin\":\"v1_ccd_inventory\",\"isomeric_smiles\":\"cc1cc(cc(c1c2c(n(cn2)c)c3ccnc4c3ccc(c4)f)c)cn\",\"primary_name\":\"[4-[5-(7-fluoranylquinolin-4-yl)-1-methyl-imidazol-4-yl]-3,5-dimethyl-phenyl]methanamine\",\"retrieval_date\":\"2026-10-24\",\"smiles_stereo_by_ccd\":\"{\\\"eje\\\": \\\"cc1cc(cc(c1c2c(n(cn2)c)c3ccnc4c3ccc(c4)f)c)cn\\\"}\",\"source_metadata_sha256\":\"{\\\"eje\\\": \\\"4420a58e1e2dc7985843e11811dec4d72c963f256b3f66eda18bde5db1f66e3c\\\"}\",\"source_urls\":[\"https://www.rcsb.org/ligand/eje\"]} pmid:31285596 2019 https://www.thesgc.org/chemical-probes/bi-9321 pmid:31285596 2019 https://www.thesgc.org/chemical-probes/bi-9321 pmid:34469831 2022 https://pmc.ncbi.nlm.nih.gov/articles/pmc8882712/",
      "source_urls": [
        "https://pmc.ncbi.nlm.nih.gov/articles/PMC8882712/",
        "https://www.rcsb.org/ligand/EJE",
        "https://www.thesgc.org/chemical-probes/bi-9321"
      ],
      "verification_pending": false,
      "context_observations": [
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          "audit_decision": "retain_with_explicit_endpoint_and_identity",
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          "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
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          "compound_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
          "compound_name": "BI-9321",
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          "curation_version": "frozen-v1.2",
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          "evidence_location": "SGC probe developer report: Overview",
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          "gene": "NSD3",
          "interpretation": "Primary developer website; original full article assay table was not retrieved.",
          "is_measured": true,
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          "molecular_entity_type": "small_molecule_preparation",
          "normalized_exact_uM": 0.166,
          "numeric_transcription_status": "matches_primary_report",
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          "protein_id": "UP:Q9BZ95",
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          "reference_id": "PMID:31285596",
          "remaining_uncertainty": "Primary replicate conflict: Figure 3a states n=3 independent experiments, while Supplementary Table 7 states SPR n=4; both report SD. Indexed primary SPR Methods supply residues 263–398 and buffer, but the full PDF was unavailable. Exact assay temperature, mutations and per-dose contact times remain not inspected.",
          "replicates": "3 independent experiments (Figure 3a); 4 (Supplementary Table 7); unresolved source discrepancy",
          "role": "reported_chemical_probe",
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          "source_database": "Primary literature (frozen Atlas)",
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            "remaining_uncertainty": "Primary replicate conflict: Figure 3a states n=3 independent experiments, while Supplementary Table 7 states SPR n=4; both report SD. Indexed primary SPR Methods supply residues 263–398 and buffer, but the full PDF was unavailable. Exact assay temperature, mutations and per-dose contact times remain not inspected.",
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            "source_reported_uncertainty": "3.0",
            "source_reported_units": "nM",
            "source_reported_value": "166",
            "source_verification_scope": "Phase 3 actual publisher Supplementary Table 7 and official Figure 3/4 captions; selected indexed accepted-manuscript Methods, full PDF unavailable (403); developer identity page",
            "temperature_C": null,
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            "unit_conversion": null,
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            "verification_level": "primary_developer_assay_report_verified"
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          "source_verification_scope": "Phase 3 actual publisher Supplementary Table 7 and official Figure 3/4 captions; selected indexed accepted-manuscript Methods, full PDF unavailable (403); developer identity page",
          "target_scope": "domain_specific",
          "temperature_C": null,
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          "unit_conversion": null,
          "units": "nM",
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          "curation_version": "frozen-v1.2",
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          "domain_id": "UP:Q9BZ95:PWWP1",
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          "evidence_class": "cellular_interaction_response",
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          "numeric_transcription_status": "matches_primary_report",
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          "remaining_uncertainty": "The value 1.2 ± 0.06 uM, SD and n=3 were verified in the actual Supplementary Table 7. Full NanoBRET construct and conditions were not inspected. The 1.4 uM direct tracer-engagement endpoint is separate from this histone PPI assay.",
          "replicates": "3 independent replicates (Figure 4e; also Supplementary Table 7)",
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            "replicates": "3 independent replicates (Figure 4e; also Supplementary Table 7)",
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            "source_reported_uncertainty": "0.06",
            "source_reported_units": "µM",
            "source_reported_value": "1.2",
            "source_verification_scope": "Phase 3 actual publisher Supplementary Table 7 and official Figure 3/4 captions; selected indexed accepted-manuscript Methods, full PDF unavailable (403); developer identity page",
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            "compound_syringe_concentration_uM": 200,
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            "first_injection_removed": true,
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            "protein_concentration_uM": 20,
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          "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC8882712/",
          "gene": "NSD3",
          "inclusion_rationale": "Primary source explicitly identifies this preparation, target context and observation.",
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          "preparation_id": "PREP:BI-9321",
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          "publication_year": 2022,
          "reference_id": "PMID:34469831",
          "remaining_uncertainty": "Primary manuscript and Methods inspected; individual raw titration files not re-fitted. BI-9321 is a distinct study-specific ITC measurement, not the original 2019 SPR result.",
          "replicates": "2 independent measurements",
          "retrieval_date": "2026-10-26",
          "role": "experimentally_studied_ligand",
          "source_database": "Primary literature (Phase 5)",
          "source_id": "P5:S:XU2022",
          "source_measurement_key": "7a5643332d9884d1ebb0e010bd63f15485c8df4e1297f1a9aeeeea672f48b98f",
          "source_original": {
            "DMSO_percent": 1,
            "assay_construct_end": 402,
            "assay_construct_start": 247,
            "assay_context": "purified_domain",
            "assay_organism": "Homo sapiens",
            "assay_record_id": "PWWP5:ASSAY:0001",
            "assay_type": "ITC Kd",
            "assay_value_transferred_to_modeled_stereoisomers": false,
            "buffer": "50 mM Tris-HCl; 150 mM NaCl; 1% DMSO; 3% NMP",
            "ccd_id": null,
            "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
            "compound_name": "BI-9321",
            "conditions": {
              "buffer": "50 mM Tris-HCl; 150 mM NaCl; 1% DMSO; 3% NMP",
              "compound_syringe_concentration_uM": 200,
              "construct": "NSD3 247–402 in pNICBio2, E. coli expressed",
              "first_injection_removed": true,
              "model": "single binding site",
              "pH": 6.8,
              "protein_concentration_uM": 20,
              "temperature_C": 15
            },
            "domain": "PWWP1",
            "domain_id": "UP:Q9BZ95:PWWP1",
            "endpoint": "Kd",
            "evidence_class": "direct_binding_affinity",
            "evidence_location": "Results and Figure 2B-D; STAR Methods: ITC",
            "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC8882712/",
            "gene": "NSD3",
            "inclusion_rationale": "Primary source explicitly identifies this preparation, target context and observation.",
            "is_negative": false,
            "numeric_transcription_status": "source_preserved",
            "numeric_value_inferred_from_structure": false,
            "pH": 6.8,
            "pdb_id": null,
            "preparation_id": "PREP:BI-9321",
            "protein_id": "UP:Q9BZ95",
            "publication_year": 2022,
            "reference_id": "PMID:34469831",
            "remaining_uncertainty": "Primary manuscript and Methods inspected; individual raw titration files not re-fitted. BI-9321 is a distinct study-specific ITC measurement, not the original 2019 SPR result.",
            "replicates": "2 independent measurements",
            "retrieval_date": "2026-10-26",
            "role": "experimentally_studied_ligand",
            "source_id": "P5:S:XU2022",
            "source_reported_uncertainty": "0.04",
            "source_reported_units": "µM",
            "source_reported_value": "1.7",
            "source_verification_scope": "NCBI BioC primary full text; Results, ITC Methods and Figure 2/3 captions inspected",
            "temperature_C": 15,
            "uncertainty": 0.04,
            "uncertainty_type": "SD",
            "uncertainty_uM": 0.04,
            "units": "µM",
            "value": 1.7,
            "value_operator": "=",
            "value_uM": 1.7,
            "verification_level": "primary_source_verified",
            "version": "phase5.chemical_curation.1.1.0"
          },
          "source_reported_uncertainty": "0.04",
          "source_reported_units": "µM",
          "source_reported_value": "1.7",
          "source_verification_scope": "NCBI BioC primary full text; Results, ITC Methods and Figure 2/3 captions inspected",
          "target_scope": "domain_specific",
          "temperature_C": 15,
          "uncertainty": 0.04,
          "uncertainty_type": "SD",
          "uncertainty_uM": 0.04,
          "units": "µM",
          "value": 1.7,
          "value_operator": "=",
          "value_uM": 1.7,
          "verification_level": "primary_source_verified",
          "version": "phase5.chemical_curation.1.1.0"
        }
      ],
      "context_structures": [
        {
          "Pfam_contacts_5A": "[{\"auth_asym_id\": \"A\", \"auth_seq_id\": \"278\", \"component\": \"VAL\", \"entity_position\": 16, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.7836, \"uniprot_position\": 278}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"281\", \"component\": \"TYR\", \"entity_position\": 19, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3221, \"uniprot_position\": 281}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"282\", \"component\": \"PRO\", \"entity_position\": 20, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.6453, \"uniprot_position\": 282}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"284\", \"component\": \"TRP\", \"entity_position\": 22, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3868, \"uniprot_position\": 284}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"312\", \"component\": \"PHE\", \"entity_position\": 50, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.5405, \"uniprot_position\": 312}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"314\", \"component\": \"SER\", \"entity_position\": 52, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.8197, \"uniprot_position\": 314}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"316\", \"component\": \"GLN\", \"entity_position\": 54, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.1952, \"uniprot_position\": 316}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"318\", \"component\": \"GLU\", \"entity_position\": 56, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.9728, \"uniprot_position\": 318}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"319\", \"component\": \"ARG\", \"entity_position\": 57, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6711, \"uniprot_position\": 319}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 58, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.0668, \"uniprot_position\": 320}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"363\", \"component\": \"ARG\", \"entity_position\": 101, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.5282, \"uniprot_position\": 363}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"364\", \"component\": \"GLU\", \"entity_position\": 102, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6582, \"uniprot_position\": 364}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"367\", \"component\": \"GLN\", \"entity_position\": 105, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.8252, \"uniprot_position\": 367}]",
          "biochemical_activity_inferred": 0,
          "ccd_id": "EJE",
          "chain_contacts_5A": "[{\"auth_asym_id\": \"A\", \"auth_seq_id\": \"278\", \"component\": \"VAL\", \"entity_position\": 16, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.7836, \"uniprot_position\": 278}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"281\", \"component\": \"TYR\", \"entity_position\": 19, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3221, \"uniprot_position\": 281}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"282\", \"component\": \"PRO\", \"entity_position\": 20, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.6453, \"uniprot_position\": 282}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"284\", \"component\": \"TRP\", \"entity_position\": 22, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3868, \"uniprot_position\": 284}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"312\", \"component\": \"PHE\", \"entity_position\": 50, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.5405, \"uniprot_position\": 312}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"314\", \"component\": \"SER\", \"entity_position\": 52, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.8197, \"uniprot_position\": 314}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"316\", \"component\": \"GLN\", \"entity_position\": 54, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.1952, \"uniprot_position\": 316}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"318\", \"component\": \"GLU\", \"entity_position\": 56, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.9728, \"uniprot_position\": 318}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"319\", \"component\": \"ARG\", \"entity_position\": 57, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6711, \"uniprot_position\": 319}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 58, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.0668, \"uniprot_position\": 320}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"363\", \"component\": \"ARG\", \"entity_position\": 101, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.5282, \"uniprot_position\": 363}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"364\", \"component\": \"GLU\", \"entity_position\": 102, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6582, \"uniprot_position\": 364}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"367\", \"component\": \"GLN\", \"entity_position\": 105, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.8252, \"uniprot_position\": 367}]",
          "chain_id": "PDB:6G2O:CHAIN:A:UP:Q9BZ95",
          "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "contact_distance_rank": 1,
          "core_contacts_5A": "[{\"auth_asym_id\": \"A\", \"auth_seq_id\": \"278\", \"component\": \"VAL\", \"entity_position\": 16, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.7836, \"uniprot_position\": 278}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"281\", \"component\": \"TYR\", \"entity_position\": 19, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3221, \"uniprot_position\": 281}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"282\", \"component\": \"PRO\", \"entity_position\": 20, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.6453, \"uniprot_position\": 282}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"284\", \"component\": \"TRP\", \"entity_position\": 22, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3868, \"uniprot_position\": 284}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"312\", \"component\": \"PHE\", \"entity_position\": 50, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.5405, \"uniprot_position\": 312}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"314\", \"component\": \"SER\", \"entity_position\": 52, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.8197, \"uniprot_position\": 314}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"316\", \"component\": \"GLN\", \"entity_position\": 54, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.1952, \"uniprot_position\": 316}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"318\", \"component\": \"GLU\", \"entity_position\": 56, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.9728, \"uniprot_position\": 318}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"319\", \"component\": \"ARG\", \"entity_position\": 57, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6711, \"uniprot_position\": 319}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 58, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.0668, \"uniprot_position\": 320}]",
          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:Q9BZ95:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD3",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"A\"]",
            "auth_seq_id": "401",
            "ccd_id": "EJE",
            "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD3\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"A\", \"sequence_length\": 136, \"uniprot_ids\": [\"Q9BZ95\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 27,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "B",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:6G2O:LIG:B:EJE:401:.",
            "nearest_polypeptide_distance_angstrom": 2.8197,
            "nearest_polypeptide_label_asym_id": "A",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "6G2O",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"A\", \"auth_seq_id\": \"278\", \"component\": \"VAL\", \"entity_position\": 16, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.7836, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"281\", \"component\": \"TYR\", \"entity_position\": 19, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3221, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"282\", \"component\": \"PRO\", \"entity_position\": 20, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.6453, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"284\", \"component\": \"TRP\", \"entity_position\": 22, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3868, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"312\", \"component\": \"PHE\", \"entity_position\": 50, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.5405, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"314\", \"component\": \"SER\", \"entity_position\": 52, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.8197, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"316\", \"component\": \"GLN\", \"entity_position\": 54, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.1952, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"318\", \"component\": \"GLU\", \"entity_position\": 56, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.9728, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"319\", \"component\": \"ARG\", \"entity_position\": 57, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6711, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 58, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.0668, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"363\", \"component\": \"ARG\", \"entity_position\": 101, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.5282, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"364\", \"component\": \"GLU\", \"entity_position\": 102, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6582, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"367\", \"component\": \"GLN\", \"entity_position\": 105, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.8252, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD3__HUMAN__Q9BZ95/Co-Crystals/6G2O/original.cif",
            "source_coordinate_sha256": "74d2d63c67c68d75cd98a65a67771b43791e1d61b52c6fd985805899f9c8ecfa",
            "unique_heavy_atom_names": 27
          },
          "ligand_instance_id": "PDB:6G2O:LIG:B:EJE:401:.",
          "ligand_label_asym_id": "B",
          "minimum_Pfam_distance_angstrom": 2.8197,
          "minimum_chain_distance_angstrom": 2.8197,
          "minimum_core_distance_angstrom": 2.8197,
          "multiple_contacting_mapped_chains": 0,
          "pdb_id": "6G2O",
          "protein_id": "UP:Q9BZ95",
          "protein_label_asym_id": "A",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:6G2O:LIG:B:EJE:401:.:SITE:UP:Q9BZ95:PWWP1:A",
          "source_coordinate_sha256": "74d2d63c67c68d75cd98a65a67771b43791e1d61b52c6fd985805899f9c8ecfa"
        }
      ],
      "context_assay_count": 3,
      "context_measured_count": 3,
      "context_bound_count": 1,
      "context_pdb_count": 1,
      "context_negative_count": 0,
      "context_is_probe": true,
      "context_bioactivity_only": false,
      "context_kind": "Measured + bound structure",
      "science": {
        "studied_compound": true,
        "measured_count": 3,
        "structural_research_ligand": true,
        "research_pdb_count": 1,
        "other_component": false,
        "component_site_count": 0,
        "verification_queue": true,
        "positive_direct_binder": true,
        "reported_probe": true,
        "reported_control": false,
        "cellular_activity": true,
        "protein_degradation": false,
        "bioactivity_only": false,
        "research_site_count": 1,
        "unknown_site_count": 0,
        "annotation_roles": [
          "studied",
          "structural",
          "unresolved"
        ]
      },
      "science_label": "Studied + deposited research ligand",
      "science_profile": {
        "annotation_roles": [
          "studied",
          "structural",
          "unresolved"
        ],
        "cellular_activity": true,
        "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
        "compound_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
        "entity_kind": "chemical_identity",
        "identity_resolved": true,
        "measured_observation_count": 3,
        "name": "BI-9321",
        "other_pdb_component": false,
        "other_site_count": 0,
        "positive_direct_binder": true,
        "primary_view": "studied",
        "protein_degradation": false,
        "reported_control": false,
        "reported_probe": true,
        "rule": "Independent source observations + per-site coordinate role, not universal pharmacology",
        "source_observation_ids": [
          "PWWP5:ASSAY:0001",
          "PWWP:ASSAY:0008",
          "PWWP:ASSAY:0009"
        ],
        "source_site_ids": [
          "PDB:6G2O:LIG:B:EJE:401:.:SITE:UP:Q9BZ95:PWWP1:A"
        ],
        "structural_research_ligand": true,
        "structural_research_site_count": 1,
        "studied_compound": true,
        "total_observation_count": 3,
        "uncertain_site_count": 0,
        "uncertainty": "Classification is evidence- and experiment-scoped; missing assays do not prove nonbinding.",
        "verification_queue": true,
        "verification_status": "source_scoped_mixed"
      },
      "science_site_roles": {
        "PDB:6G2O:LIG:B:EJE:401:.:SITE:UP:Q9BZ95:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/EJE",
          "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "74d2d63c67c68d75cd98a65a67771b43791e1d61b52c6fd985805899f9c8ecfa",
          "domain_id": "UP:Q9BZ95:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6G2O:LIG:B:EJE:401:.",
          "observed_other_component": false,
          "pdb_id": "6G2O",
          "protein_id": "UP:Q9BZ95",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6G2O:LIG:B:EJE:401:.:SITE:UP:Q9BZ95:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6G2O",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        }
      },
      "science_assay_roles": {
        "PWWP:ASSAY:0008": {
          "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
          "domain_id": "UP:Q9BZ95:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0008",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:BI-9321",
          "protein_id": "UP:Q9BZ95",
          "remaining_uncertainty": "Primary replicate conflict: Figure 3a states n=3 independent experiments, while Supplementary Table 7 states SPR n=4; both report SD. Indexed primary SPR Methods supply residues 263–398 and buffer, but the full PDF was unavailable. Exact assay temperature, mutations and per-dose contact times remain not inspected.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": true,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S03",
          "source_location": "SGC probe developer report: Overview",
          "source_role": "reported_chemical_probe",
          "source_url": "https://www.thesgc.org/chemical-probes/bi-9321",
          "source_verification_scope": "Phase 3 actual publisher Supplementary Table 7 and official Figure 3/4 captions; selected indexed accepted-manuscript Methods, full PDF unavailable (403); developer identity page",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "nM",
          "value": 166.0,
          "verification_status": "primary_developer_assay_report_verified"
        },
        "PWWP:ASSAY:0009": {
          "chemical_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WOAOENGFAAUUGT-UHFFFAOYSA-N",
          "domain_id": "UP:Q9BZ95:PWWP1",
          "endpoint": "IC50",
          "evidence_type": "cellular_activity",
          "explicitly_negative": false,
          "measured": true,
          "method": "NanoBRET",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0009",
          "operator": "=",
          "positive_direct_binder": false,
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        "N-cyclopropyl-3-oxo-N-({4-[(pyrimidin-4-yl)carbamoyl]phenyl}methyl)-3,4-dihydro-2H-1,4-benzoxazine-7-carboxamide",
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      "classifications": [
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        "Negative / censored observations"
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        "descriptor_scope": "RDKit calculation for the source identity; not an experimental measurement",
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        "rdkit_version": "2025.09.3",
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      "development_status": "Not independently curated",
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        "UP:Q9BZ95:PWWP1"
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          "predicate": "negative_control_for",
          "relationship": "has negative control for",
          "relationship_id": "P5:REL:UNC7145",
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          "source_id": "P5:S:DILWORTH2021",
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      "relevant": true,
      "search_text": "unc6934 inchikey:kozgeduwaqfvav-uhfffaoysa-n n-cyclopropyl-3-oxo-n-({4-[(pyrimidin-4-yl)carbamoyl]phenyl}methyl)-3,4-dihydro-2h-1,4-benzoxazine-7-carboxamide unc6934 nsd2 nsd3 up:o96028:pwwp1 up:q9bz95:pwwp1 6xcg {\"aliases\":[\"n-cyclopropyl-3-oxo-n-({4-[(pyrimidin-4-yl)carbamoyl]phenyl}methyl)-3,4-dihydro-2h-1,4-benzoxazine-7-carboxamide\"],\"ccd_ids\":[\"v01\"],\"ccd_names\":\"[\\\"n-cyclopropyl-3-oxo-n-({4-[(pyrimidin-4-yl)carbamoyl]phenyl}methyl)-3,4-dihydro-2h-1,4-benzoxazine-7-carboxamide\\\"]\",\"ccd_types\":\"[\\\"non-polymer\\\"]\",\"chemical_id\":\"inchikey:kozgeduwaqfvav-uhfffaoysa-n\",\"connectivity_block\":\"kozgeduwaqfvav\",\"curated_source_sha256\":null,\"curation_version\":\"frozen-v1.2\",\"external_identifiers\":{},\"formal_charge_by_ccd\":\"{\\\"v01\\\": 0}\",\"formulae\":\"[\\\"c24 h21 n5 o4\\\"]\",\"geometry_note\":\"ccd ideal sdf is a reference chemical geometry, not a deposited bound pose.\",\"identity_status\":\"complete_deposited_inchikey\",\"inchikey\":\"kozgeduwaqfvav-uhfffaoysa-n\",\"inventory_origin\":\"v1_ccd_inventory\",\"isomeric_smiles\":\"c1cc(ccc1cn(c2cc2)c(=o)c3ccc4c(c3)occ(=o)n4)c(=o)nc5ccncn5\",\"primary_name\":\"n-cyclopropyl-3-oxo-n-({4-[(pyrimidin-4-yl)carbamoyl]phenyl}methyl)-3,4-dihydro-2h-1,4-benzoxazine-7-carboxamide\",\"retrieval_date\":\"2026-10-24\",\"smiles_stereo_by_ccd\":\"{\\\"v01\\\": \\\"c1cc(ccc1cn(c2cc2)c(=o)c3ccc4c(c3)occ(=o)n4)c(=o)nc5ccncn5\\\"}\",\"source_metadata_sha256\":\"{\\\"v01\\\": \\\"ced5ef4acd208273eb85fecdbbc375b05202a622e993dc4571d4354dcab003ca\\\"}\",\"source_urls\":[\"https://www.rcsb.org/ligand/v01\"]} pmid:34782742 2022 https://pmc.ncbi.nlm.nih.gov/articles/pmc9189931/ pmid:34782742 2022 https://pmc.ncbi.nlm.nih.gov/articles/pmc9189931/ pmid:34782742 2022 https://pmc.ncbi.nlm.nih.gov/articles/pmc9189931/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/",
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          "replicates": "3 (triplicate experiments; independence level not specified)",
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            "source_reported_units": "nM",
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          "verification_level": "primary_full_text_sections_verified"
        },
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            "domain_id": "UP:O96028:PWWP1",
            "endpoint_label_status": null,
            "evidence_class": "biochemical_interaction_inhibition",
            "evidence_location": "Discussion; biochemical characterization",
            "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
            "gene": "NSD2",
            "interpretation": "Binding-interaction assay, not a direct catalytic SET-domain inhibition measurement.",
            "molecular_entity_type": "small_molecule_preparation",
            "numeric_transcription_status": "matches_primary_report",
            "numeric_value_inferred_from_structure": 0,
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            "pdb_id": "6XCG",
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            "protein_id": "UP:O96028",
            "qualitative_result": null,
            "reference_id": "PMID:34782742",
            "remaining_uncertainty": "23°C is the antagonist preincubation temperature, not a verified readout temperature. Final DMSO fraction and SD-versus-SEM definition for ±13 nM are not explicit in the inspected assay-specific text.",
            "replicates": "3 independent experiments; each 10-point curve in duplicate",
            "role": "reported_chemical_probe",
            "source_component_url": null,
            "source_id": "S02",
            "source_reported_uncertainty": "13",
            "source_reported_units": "nM",
            "source_reported_value": "104",
            "source_verification_scope": "Phase 3 primary full-text Methods, Results and figure legends through official NCBI BioC; actual publisher supplement; assay-specific scope retained",
            "temperature_C": 23,
            "uncertainty": 13.0,
            "uncertainty_type": null,
            "uncertainty_uM": 0.013,
            "unit_conversion": null,
            "units": "nM",
            "value": 104.0,
            "value_operator": "=",
            "value_uM": 0.104,
            "verification_level": "primary_full_text_sections_verified"
          },
          "source_reported_uncertainty": "13",
          "source_reported_units": "nM",
          "source_reported_value": "104",
          "source_verification_scope": "Phase 3 primary full-text Methods, Results and figure legends through official NCBI BioC; actual publisher supplement; assay-specific scope retained",
          "target_scope": "domain_specific",
          "temperature_C": 23,
          "uncertainty": 13.0,
          "uncertainty_type": null,
          "uncertainty_uM": 0.013,
          "unit_conversion": null,
          "units": "nM",
          "value": 104.0,
          "value_operator": "=",
          "value_uM": 0.104,
          "verification_level": "primary_full_text_sections_verified"
        },
        {
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          "assay_construct_end": null,
          "assay_construct_start": null,
          "assay_record_id": "PWWP:ASSAY:0006",
          "assay_type": "NanoBRET PPI half-response",
          "assay_value_transferred_to_modeled_stereoisomers": 0,
          "audit_decision": "retain_with_explicit_endpoint_and_identity",
          "baseline_assay_record": 1,
          "buffer": "DMEM/F12 without phenol red; 4% FBS; 100 U/mL penicillin; 100 ug/mL streptomycin",
          "ccd_id": "V01",
          "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "chemical_identity_status": "exact_single_CCD_identity",
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          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
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          "curation_version": "frozen-v1.2",
          "domain": "PWWP1",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Unstandardized half-response concentration",
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          "evidence_class": "cellular_interaction_response",
          "evidence_location": "Results: cellular target engagement; Figure 4d",
          "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
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          "is_measured": true,
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          "numeric_transcription_status": "matches_primary_report",
          "numeric_value_inferred_from_structure": 0,
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          "qualitative_result": null,
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          "replicates": "3 independent replicates",
          "role": "reported_chemical_probe",
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          "source_id": "S02",
          "source_measurement_key": "73dd58f0b5956416fa5d2f849b2939bcaf1b614b24b1131628947441ac92994c",
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            "ccd_id": "V01",
            "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
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            "domain": "PWWP1",
            "domain_id": "UP:O96028:PWWP1",
            "endpoint_label_status": "Results/Figure use EC50, Discussion uses IC50; neutral half-response retained",
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            "evidence_location": "Results: cellular target engagement; Figure 4d",
            "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
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            "numeric_value_inferred_from_structure": 0,
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            "replicates": "3 independent replicates",
            "role": "reported_chemical_probe",
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            "source_id": "S02",
            "source_reported_uncertainty": "0.25",
            "source_reported_units": "µM",
            "source_reported_value": "1.23",
            "source_verification_scope": "Phase 3 primary full-text Methods, Results and figure legends through official NCBI BioC; actual publisher supplement; assay-specific scope retained",
            "temperature_C": null,
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            "uncertainty_type": null,
            "uncertainty_uM": 0.25,
            "unit_conversion": null,
            "units": "µM",
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            "value_operator": "=",
            "value_uM": 1.23,
            "verification_level": "primary_full_text_sections_verified"
          },
          "source_reported_uncertainty": "0.25",
          "source_reported_units": "µM",
          "source_reported_value": "1.23",
          "source_verification_scope": "Phase 3 primary full-text Methods, Results and figure legends through official NCBI BioC; actual publisher supplement; assay-specific scope retained",
          "target_scope": "domain_specific",
          "temperature_C": null,
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          "uncertainty_type": null,
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          "unit_conversion": null,
          "units": "µM",
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          "value_operator": "=",
          "value_uM": 1.23,
          "verification_level": "primary_full_text_sections_verified"
        },
        {
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          "abstract_reported_units": null,
          "abstract_reported_value": null,
          "assay_construct_end": 368,
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          "assay_record_id": "PWWP:ASSAY:0014",
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          "assay_value_transferred_to_modeled_stereoisomers": 0,
          "audit_decision": "retain_with_explicit_endpoint_and_identity",
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          "ccd_id": "V01",
          "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
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          "chemical_identity_status": "exact_single_CCD_identity",
          "component_context": null,
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
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          "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD2 208–368\", \"purified_tags\": \"N-terminal Avi; C-terminal 6His; biotinylated\", \"replicates\": \"at least 3\", \"uncertainty_type\": \"SD\"}",
          "crystallographic_component_ids": null,
          "curation_version": "frozen-v1.2",
          "domain": "PWWP1",
          "domain_id": "UP:O96028:PWWP1",
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          "is_measured": true,
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          "numeric_transcription_status": "matches_primary_report",
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          "organism": "Homo sapiens",
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          "protein_id": "UP:O96028",
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          "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
          "role": "reported_chemical_probe",
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          "source_database": "Primary literature (frozen Atlas)",
          "source_id": "S05",
          "source_measurement_key": "b6a422c24a429b6fecbccb8c4722557675fbd65bfeca995764913f27fe18a750",
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            "ccd_id": "V01",
            "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
            "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
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            "domain": "PWWP1",
            "domain_id": "UP:O96028:PWWP1",
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            "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
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            "source_reported_units": "µM",
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          "ccd_id": "V01",
          "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "chemical_identity_status": "exact_single_CCD_identity",
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          "crystallographic_component_ids": null,
          "curation_version": "frozen-v1.2",
          "domain": "PWWP1",
          "domain_id": "UP:O96028:PWWP1",
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          "is_measured": true,
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          "normalized_exact_uM": 1.33,
          "numeric_transcription_status": "matches_primary_report",
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          "organism": "Homo sapiens",
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          "pdb_id": null,
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          "protein_id": "UP:O96028",
          "publication_year": 2025,
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          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
          "role": "reported_chemical_probe",
          "source_component_url": null,
          "source_database": "Primary literature (frozen Atlas)",
          "source_id": "S05",
          "source_measurement_key": "5c3b0577823f4dad06be18dce48cded60d31905a2adf864071aa56e64dcad6a9",
          "source_original": {
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            "audit_decision": "retain_with_explicit_endpoint_and_identity",
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            "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.1 mM TCEP; 0.05% (w/v) Tween-20; 0.3% (v/v) DMSO",
            "ccd_id": "V01",
            "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
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            "domain": "PWWP1",
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            "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
            "role": "reported_chemical_probe",
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            "source_id": "S05",
            "source_reported_uncertainty": "0.19",
            "source_reported_units": "µM",
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            "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
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            "verification_level": "primary_full_text_sections_verified"
          },
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          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "target_scope": "domain_specific",
          "temperature_C": 25,
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          "unit_conversion": null,
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          "verification_level": "primary_full_text_sections_verified"
        },
        {
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          "assay_construct_start": 263,
          "assay_record_id": "PWWP11:ASSAY:0001",
          "assay_type": "SPR Kd counter-screen",
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          "audit_decision": null,
          "baseline_assay_record": 0,
          "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.1 mM TCEP; 0.05% (w/v) Tween-20; 0.3% (v/v) DMSO",
          "ccd_id": "V01",
          "ccd_mapping_source": null,
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          "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD3 263–398\", \"purified_tags\": \"N-terminal 6His-TEV retained\"}",
          "crystallographic_component_ids": null,
          "curation_version": "frozen-v1.2",
          "domain": "PWWP1",
          "domain_id": "UP:Q9BZ95:PWWP1",
          "endpoint": "Kd",
          "endpoint_label_status": null,
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          "evidence_location": "Table 1 NSD3 (263–398) column",
          "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
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          "interpretation": "Single counter-target experiment; not evidence of proteome-wide selectivity. No-binding rows have no inferred numerical threshold.",
          "is_measured": true,
          "is_negative": true,
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          "molecular_entity_type": "small_molecule_preparation",
          "normalized_exact_uM": null,
          "numeric_transcription_status": "matches_primary_table",
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          "organism": "Homo sapiens",
          "pH": 7.5,
          "pdb_id": null,
          "preparation_id": "PREP:UNC6934",
          "protein_id": "UP:Q9BZ95",
          "publication_year": 2025,
          "qualitative_result": null,
          "reference_id": "PMID:40959233",
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          "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
          "role": "counter_target_assay",
          "source_component_url": null,
          "source_database": "Primary literature (frozen Atlas)",
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          "source_measurement_key": "2d3d8be2eecdc71ef0bde5c1fc786cdfa6964ffc519e5f0b9249d5da8d89d31a",
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            "abstract_reported_endpoint": null,
            "abstract_reported_method": null,
            "abstract_reported_units": null,
            "abstract_reported_value": null,
            "assay_construct_end": 398,
            "assay_construct_start": 263,
            "assay_record_id": "PWWP11:ASSAY:0001",
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            "assay_value_transferred_to_modeled_stereoisomers": 0,
            "audit_decision": null,
            "baseline_assay_record": 0,
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            "ccd_mapping_source": null,
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            "chemical_identity_status": "exact_single_CCD_identity",
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            "crystallographic_component_ids": null,
            "domain": "PWWP1",
            "domain_id": "UP:Q9BZ95:PWWP1",
            "endpoint_label_status": null,
            "evidence_class": "censored_binding_limit",
            "evidence_location": "Table 1 NSD3 (263–398) column",
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            "numeric_value_inferred_from_structure": null,
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            "pdb_id": null,
            "preparation_id": "PREP:UNC6934",
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            "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
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            "source_component_url": null,
            "source_id": "S05",
            "source_reported_uncertainty": null,
            "source_reported_units": null,
            "source_reported_value": null,
            "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
            "temperature_C": 25,
            "uncertainty": null,
            "uncertainty_type": null,
            "uncertainty_uM": null,
            "unit_conversion": null,
            "units": "µM",
            "value": 30.0,
            "value_operator": ">",
            "value_uM": 30.0,
            "verification_level": null
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          "source_reported_uncertainty": null,
          "source_reported_units": null,
          "source_reported_value": null,
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "target_scope": "domain_specific",
          "temperature_C": 25,
          "uncertainty": null,
          "uncertainty_type": null,
          "uncertainty_uM": null,
          "unit_conversion": null,
          "units": "µM",
          "value": 30.0,
          "value_operator": ">",
          "value_uM": 30.0,
          "verification_level": null
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      "context_structures": [
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          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"A\"]",
            "auth_seq_id": "401",
            "ccd_id": "V01",
            "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"A\", \"sequence_length\": 141, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
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            "ideal_CCD_SDF_is_source_pose": 0,
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            "ligand_instance_id": "PDB:6XCG:LIG:D:V01:401:.",
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            "occupancy_min": 1.0,
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          "minimum_chain_distance_angstrom": 2.8613,
          "minimum_core_distance_angstrom": 2.8613,
          "multiple_contacting_mapped_chains": 0,
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          "protein_id": "UP:O96028",
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          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
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          "covalent_connection_ids": "[]",
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          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"B\"]",
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            "ccd_id": "V01",
            "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"B\", \"sequence_length\": 141, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
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            "ideal_CCD_SDF_is_source_pose": 0,
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            "label_seq_id": null,
            "ligand_instance_id": "PDB:6XCG:LIG:E:V01:401:.",
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/6XCG/original.cif",
            "source_coordinate_sha256": "2c370701c9b83de7ae6137f91d2130519a48c261a93ec5bc480dfcc3bc982200",
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          "minimum_chain_distance_angstrom": 2.8758,
          "minimum_core_distance_angstrom": 2.9125,
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          "protein_id": "UP:O96028",
          "protein_label_asym_id": "B",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
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          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"C\"]",
            "auth_seq_id": "401",
            "ccd_id": "V01",
            "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"C\", \"sequence_length\": 141, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 33,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "I",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:6XCG:LIG:I:V01:401:.",
            "nearest_polypeptide_distance_angstrom": 2.794,
            "nearest_polypeptide_label_asym_id": "C",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "6XCG",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"C\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 21, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.7533, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 24, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.326, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 27, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.5912, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 57, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.1984, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 58, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.2908, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 59, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.1601, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 60, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.206, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 61, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.9688, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"271\", \"component\": \"PRO\", \"entity_position\": 62, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.4163, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 63, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4199, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 64, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.886, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 65, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.7615, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"318\", \"component\": \"LEU\", \"entity_position\": 109, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.3244, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 112, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.794, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/6XCG/original.cif",
            "source_coordinate_sha256": "2c370701c9b83de7ae6137f91d2130519a48c261a93ec5bc480dfcc3bc982200",
            "unique_heavy_atom_names": 33
          },
          "ligand_instance_id": "PDB:6XCG:LIG:I:V01:401:.",
          "ligand_label_asym_id": "I",
          "minimum_Pfam_distance_angstrom": 2.794,
          "minimum_chain_distance_angstrom": 2.794,
          "minimum_core_distance_angstrom": 2.886,
          "multiple_contacting_mapped_chains": 0,
          "pdb_id": "6XCG",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "C",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:6XCG:LIG:I:V01:401:.:SITE:UP:O96028:PWWP1:C",
          "source_coordinate_sha256": "2c370701c9b83de7ae6137f91d2130519a48c261a93ec5bc480dfcc3bc982200"
        }
      ],
      "context_assay_count": 6,
      "context_measured_count": 6,
      "context_bound_count": 1,
      "context_pdb_count": 1,
      "context_negative_count": 1,
      "context_is_probe": true,
      "context_bioactivity_only": false,
      "context_kind": "Measured + bound structure",
      "science": {
        "studied_compound": true,
        "measured_count": 6,
        "structural_research_ligand": true,
        "research_pdb_count": 1,
        "other_component": false,
        "component_site_count": 0,
        "verification_queue": false,
        "positive_direct_binder": true,
        "reported_probe": true,
        "reported_control": false,
        "cellular_activity": true,
        "protein_degradation": false,
        "bioactivity_only": false,
        "research_site_count": 3,
        "unknown_site_count": 0,
        "annotation_roles": [
          "studied",
          "structural"
        ]
      },
      "science_label": "Studied + deposited research ligand",
      "science_profile": {
        "annotation_roles": [
          "studied",
          "structural"
        ],
        "cellular_activity": true,
        "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
        "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
        "entity_kind": "chemical_identity",
        "identity_resolved": true,
        "measured_observation_count": 6,
        "name": "UNC6934",
        "other_pdb_component": false,
        "other_site_count": 0,
        "positive_direct_binder": true,
        "primary_view": "studied",
        "protein_degradation": false,
        "reported_control": false,
        "reported_probe": true,
        "rule": "Independent source observations + per-site coordinate role, not universal pharmacology",
        "source_observation_ids": [
          "PWWP:ASSAY:0021",
          "PWWP:ASSAY:0014",
          "PWWP11:ASSAY:0001",
          "PWWP:ASSAY:0004",
          "PWWP:ASSAY:0005",
          "PWWP:ASSAY:0006"
        ],
        "source_site_ids": [
          "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A",
          "PDB:6XCG:LIG:E:V01:401:.:SITE:UP:O96028:PWWP1:B",
          "PDB:6XCG:LIG:I:V01:401:.:SITE:UP:O96028:PWWP1:C"
        ],
        "structural_research_ligand": true,
        "structural_research_site_count": 3,
        "studied_compound": true,
        "total_observation_count": 6,
        "uncertain_site_count": 0,
        "uncertainty": "Classification is evidence- and experiment-scoped; missing assays do not prove nonbinding.",
        "verification_queue": false,
        "verification_status": "source_scoped_mixed"
      },
      "science_site_roles": {
        "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/V01",
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "2c370701c9b83de7ae6137f91d2130519a48c261a93ec5bc480dfcc3bc982200",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6XCG:LIG:D:V01:401:.",
          "observed_other_component": false,
          "pdb_id": "6XCG",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6XCG",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6XCG:LIG:E:V01:401:.:SITE:UP:O96028:PWWP1:B": {
          "ccd_url": "https://www.rcsb.org/ligand/V01",
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "2c370701c9b83de7ae6137f91d2130519a48c261a93ec5bc480dfcc3bc982200",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6XCG:LIG:E:V01:401:.",
          "observed_other_component": false,
          "pdb_id": "6XCG",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6XCG:LIG:E:V01:401:.:SITE:UP:O96028:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6XCG",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6XCG:LIG:I:V01:401:.:SITE:UP:O96028:PWWP1:C": {
          "ccd_url": "https://www.rcsb.org/ligand/V01",
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "2c370701c9b83de7ae6137f91d2130519a48c261a93ec5bc480dfcc3bc982200",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6XCG:LIG:I:V01:401:.",
          "observed_other_component": false,
          "pdb_id": "6XCG",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6XCG:LIG:I:V01:401:.:SITE:UP:O96028:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6XCG",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        }
      },
      "science_assay_roles": {
        "PWWP:ASSAY:0004": {
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0004",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:UNC6934",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "SPR temperature and exact uncertainty definition are not specified in the inspected assay-specific source. Triplicate experiments reported. Preparation/assay construct differs from crystallization 211–350.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": true,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S02",
          "source_location": "Results; Figures 1–2",
          "source_role": "reported_chemical_probe",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
          "source_verification_scope": "Phase 3 primary full-text Methods, Results and figure legends through official NCBI BioC; actual publisher supplement; assay-specific scope retained",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "nM",
          "value": 91.0,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0005": {
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "IC50",
          "evidence_type": "biochemical_function",
          "explicitly_negative": false,
          "measured": true,
          "method": "AlphaScreen",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0005",
          "operator": "=",
          "positive_direct_binder": false,
          "preparation_id": "PREP:UNC6934",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "23°C is the antagonist preincubation temperature, not a verified readout temperature. Final DMSO fraction and SD-versus-SEM definition for ±13 nM are not explicit in the inspected assay-specific text.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": true,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S02",
          "source_location": "Discussion; biochemical characterization",
          "source_role": "reported_chemical_probe",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
          "source_verification_scope": "Phase 3 primary full-text Methods, Results and figure legends through official NCBI BioC; actual publisher supplement; assay-specific scope retained",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "nM",
          "value": 104.0,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0006": {
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Unstandardized half-response concentration",
          "evidence_type": "cellular_activity",
          "explicitly_negative": false,
          "measured": true,
          "method": "NanoBRET PPI half-response",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0006",
          "operator": "=",
          "positive_direct_binder": false,
          "preparation_id": "PREP:UNC6934",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "NanoLuc construct boundaries, readout temperature and SD-versus-SEM are not explicit in the inspected source. Results say EC50 while Discussion says IC50; neutral half-response label retained.",
          "reported_cellular": true,
          "reported_control": false,
          "reported_probe": true,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S02",
          "source_location": "Results: cellular target engagement; Figure 4d",
          "source_role": "reported_chemical_probe",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
          "source_verification_scope": "Phase 3 primary full-text Methods, Results and figure legends through official NCBI BioC; actual publisher supplement; assay-specific scope retained",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 1.23,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0014": {
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0014",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:UNC6934",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": true,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1",
          "source_role": "reported_chemical_probe",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 0.24,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0021": {
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0021",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:UNC6934",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": true,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1",
          "source_role": "reported_chemical_probe",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 1.33,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP11:ASSAY:0001": {
          "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
          "domain_id": "UP:Q9BZ95:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "censored_binding",
          "explicitly_negative": true,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP11:ASSAY:0001",
          "operator": ">",
          "positive_direct_binder": false,
          "preparation_id": "PREP:UNC6934",
          "protein_id": "UP:Q9BZ95",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1 NSD3 (263–398) column",
          "source_role": "counter_target_assay",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 30.0,
          "verification_status": "source_scope_unresolved"
        }
      },
      "example": {
        "DMSO_percent": 0.5,
        "abstract_reported_endpoint": null,
        "abstract_reported_method": null,
        "abstract_reported_units": null,
        "abstract_reported_value": null,
        "assay_construct_end": 368,
        "assay_construct_start": 208,
        "assay_record_id": "PWWP:ASSAY:0004",
        "assay_type": "SPR Kd",
        "assay_value_transferred_to_modeled_stereoisomers": 0,
        "audit_decision": "retain_with_explicit_endpoint_and_identity",
        "baseline_assay_record": 1,
        "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.05% Tween-20; 0.5% DMSO",
        "ccd_id": "V01",
        "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
        "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
        "chemical_identity_status": "exact_single_CCD_identity",
        "component_context": null,
        "compound_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
        "compound_name": "UNC6934",
        "conditions": "{\"phase3_verification\": \"SV02A\", \"protein_construct\": \"NSD2 208–368\", \"purified_tags\": \"AviTag/NSD2(208–368)/polyhistidine; biotinylated\", \"source_protocol_highest_concentration_uM\": 2}",
        "crystallographic_component_ids": null,
        "curation_version": "frozen-v1.2",
        "domain": "PWWP1",
        "domain_id": "UP:O96028:PWWP1",
        "endpoint": "Kd",
        "endpoint_label_status": null,
        "evidence_class": "direct_binding_affinity",
        "evidence_location": "Results; Figures 1–2",
        "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
        "gene": "NSD2",
        "interpretation": null,
        "is_measured": true,
        "is_negative": false,
        "method": "SPR",
        "molecular_entity_type": "small_molecule_preparation",
        "normalized_exact_uM": 0.091,
        "numeric_transcription_status": "matches_primary_report",
        "numeric_value_inferred_from_structure": 0,
        "organism": "Homo sapiens",
        "pH": 7.4,
        "pdb_id": "6XCG",
        "preparation_id": "PREP:UNC6934",
        "protein_id": "UP:O96028",
        "publication_year": 2022,
        "qualitative_result": null,
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          "normalized_exact_uM": null,
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        {
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          "normalized_exact_uM": null,
          "numeric_transcription_status": "qualitative_or_not_reported",
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          "retrieval_date": "2026-10-26",
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        {
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            "negative_evidence_scope": "Non-detectable binding in the source experimental comparison; assay limits not recovered.",
            "numeric_transcription_status": "qualitative_or_not_reported",
            "numeric_value_inferred_from_structure": false,
            "pdb_id": null,
            "preparation_id": "PREP:BPP",
            "protein_id": "UP:O96028",
            "publication_year": 2024,
            "qualitative_result": "Source reports non-detectable affinity in the tested selectivity comparison.",
            "reference_id": "PMID:39031937",
            "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Source says NSD2 PWWP but does not specify PWWP1 versus PWWP2 in the inspected passage; domain_id remains null.",
            "replicates": null,
            "retrieval_date": "2026-10-26",
            "role": "experimentally_studied_ligand",
            "source_id": "P5:S:WEI2024",
            "source_reported_uncertainty": null,
            "source_reported_units": null,
            "source_reported_value": null,
            "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
            "uncertainty": null,
            "uncertainty_type": null,
            "uncertainty_uM": null,
            "units": null,
            "value": null,
            "value_operator": null,
            "value_uM": null,
            "verification_level": "primary_source_verified",
            "version": "phase5.chemical_curation.1.1.0"
          },
          "source_reported_uncertainty": null,
          "source_reported_units": null,
          "source_reported_value": null,
          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "target_scope": "domain_unresolved",
          "uncertainty": null,
          "uncertainty_type": null,
          "uncertainty_uM": null,
          "units": null,
          "value": null,
          "value_operator": null,
          "value_uM": null,
          "verification_level": "primary_source_verified",
          "version": "phase5.chemical_curation.1.1.0"
        }
      ],
      "context_structures": [
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          "contact_class": "native_annotation_core_contact",
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          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "HDGFL2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"A\"]",
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            "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Hepatoma-derived growth factor-related protein 2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"A\", \"sequence_length\": 93, \"uniprot_ids\": [\"Q7Z4V5\"]}, {\"description\": \"Hepatoma-derived growth factor-related protein 2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"C\", \"sequence_length\": 93, \"uniprot_ids\": [\"Q7Z4V5\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 12,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "D",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:8Z6C:LIG:D:A1D73:101:.",
            "nearest_polypeptide_distance_angstrom": 2.488,
            "nearest_polypeptide_label_asym_id": "A",
            "occupancy_max": 0.59,
            "occupancy_min": 0.59,
            "pdb_id": "8Z6C",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"A\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 15, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.2305, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 18, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4757, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 21, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3231, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 44, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3686, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"45\", \"component\": \"PHE\", \"entity_position\": 45, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.9751, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 47, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.488, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 49, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.306, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 50, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.3798, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 51, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.9037, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"17\", \"component\": \"GLY\", \"entity_position\": 17, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.8102, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"19\", \"component\": \"PRO\", \"entity_position\": 19, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.9993, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"74\", \"component\": \"ARG\", \"entity_position\": 74, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.9842, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/HDGFL2__HUMAN__Q7Z4V5/Co-Crystals/8Z6C/original.cif",
            "source_coordinate_sha256": "a52b0ce0d915a4ec6357f5dce14e0dbbacdb5fa856c24981a9187cf4168156c2",
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          "ligand_instance_id": "PDB:8Z6C:LIG:D:A1D73:101:.",
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          "multiple_contacting_mapped_chains": 1,
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          "site_id": "PDB:8Z6C:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A",
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          "biochemical_activity_inferred": 0,
          "ccd_id": "A1D73",
          "chain_contacts_5A": "[{\"auth_asym_id\": \"C\", \"auth_seq_id\": \"17\", \"component\": \"GLY\", \"entity_position\": 17, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.8102, \"uniprot_position\": 17}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"19\", \"component\": \"PRO\", \"entity_position\": 19, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.9993, \"uniprot_position\": 19}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"74\", \"component\": \"ARG\", \"entity_position\": 74, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.9842, \"uniprot_position\": 74}]",
          "chain_id": "PDB:8Z6C:CHAIN:C:UP:Q7Z4V5",
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          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "HDGFL2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"A\"]",
            "auth_seq_id": "101",
            "ccd_id": "A1D73",
            "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Hepatoma-derived growth factor-related protein 2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"A\", \"sequence_length\": 93, \"uniprot_ids\": [\"Q7Z4V5\"]}, {\"description\": \"Hepatoma-derived growth factor-related protein 2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"C\", \"sequence_length\": 93, \"uniprot_ids\": [\"Q7Z4V5\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 12,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "D",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:8Z6C:LIG:D:A1D73:101:.",
            "nearest_polypeptide_distance_angstrom": 2.488,
            "nearest_polypeptide_label_asym_id": "A",
            "occupancy_max": 0.59,
            "occupancy_min": 0.59,
            "pdb_id": "8Z6C",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"A\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 15, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.2305, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 18, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4757, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 21, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3231, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 44, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3686, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"45\", \"component\": \"PHE\", \"entity_position\": 45, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.9751, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 47, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.488, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 49, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.306, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 50, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.3798, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 51, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.9037, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"17\", \"component\": \"GLY\", \"entity_position\": 17, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.8102, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"19\", \"component\": \"PRO\", \"entity_position\": 19, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.9993, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"74\", \"component\": \"ARG\", \"entity_position\": 74, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.9842, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
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          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "8Z6C",
          "protein_id": "UP:Q7Z4V5",
          "protein_label_asym_id": "C",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:8Z6C:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C",
          "source_coordinate_sha256": "a52b0ce0d915a4ec6357f5dce14e0dbbacdb5fa856c24981a9187cf4168156c2"
        },
        {
          "Pfam_contacts_5A": "[{\"auth_asym_id\": \"B\", \"auth_seq_id\": \"13\", \"component\": \"ALA\", \"entity_position\": 13, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.7226, \"uniprot_position\": 13}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 15, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.2348, \"uniprot_position\": 15}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 18, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.3288, \"uniprot_position\": 18}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"19\", \"component\": \"PRO\", \"entity_position\": 19, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.5541, \"uniprot_position\": 19}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 21, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.5669, \"uniprot_position\": 21}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 44, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.6271, \"uniprot_position\": 44}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 47, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.6273, \"uniprot_position\": 47}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 49, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.4923, \"uniprot_position\": 49}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 51, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.8241, \"uniprot_position\": 51}]",
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        {
          "Pfam_contacts_5A": "[{\"auth_asym_id\": \"C\", \"auth_seq_id\": \"13\", \"component\": \"ALA\", \"entity_position\": 14, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.7946, \"uniprot_position\": 13}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 16, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4535, \"uniprot_position\": 15}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 19, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.3784, \"uniprot_position\": 18}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"19\", \"component\": \"PRO\", \"entity_position\": 20, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.7336, \"uniprot_position\": 19}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 22, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4555, \"uniprot_position\": 21}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 45, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4725, \"uniprot_position\": 44}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 48, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.5415, \"uniprot_position\": 47}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 50, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.5973, \"uniprot_position\": 49}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 51, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.238, \"uniprot_position\": 50}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 52, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.2169, \"uniprot_position\": 51}]",
          "biochemical_activity_inferred": 0,
          "ccd_id": "A1D73",
          "chain_contacts_5A": "[{\"auth_asym_id\": \"C\", \"auth_seq_id\": \"13\", \"component\": \"ALA\", \"entity_position\": 14, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.7946, \"uniprot_position\": 13}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 16, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4535, \"uniprot_position\": 15}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 19, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.3784, \"uniprot_position\": 18}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"19\", \"component\": \"PRO\", \"entity_position\": 20, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.7336, \"uniprot_position\": 19}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 22, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4555, \"uniprot_position\": 21}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 45, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4725, \"uniprot_position\": 44}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 48, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.5415, \"uniprot_position\": 47}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 50, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.5973, \"uniprot_position\": 49}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 51, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.238, \"uniprot_position\": 50}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 52, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.2169, \"uniprot_position\": 51}]",
          "chain_id": "PDB:9G94:CHAIN:C:UP:Q7Z4V5",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "contact_distance_rank": 1,
          "core_contacts_5A": "[{\"auth_asym_id\": \"C\", \"auth_seq_id\": \"13\", \"component\": \"ALA\", \"entity_position\": 14, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.7946, \"uniprot_position\": 13}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 16, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4535, \"uniprot_position\": 15}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 19, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.3784, \"uniprot_position\": 18}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"19\", \"component\": \"PRO\", \"entity_position\": 20, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.7336, \"uniprot_position\": 19}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 22, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4555, \"uniprot_position\": 21}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 45, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4725, \"uniprot_position\": 44}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 48, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.5415, \"uniprot_position\": 47}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 50, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.5973, \"uniprot_position\": 49}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 51, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.238, \"uniprot_position\": 50}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 52, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.2169, \"uniprot_position\": 51}]",
          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "HDGFL2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"C\"]",
            "auth_seq_id": "101",
            "ccd_id": "A1D73",
            "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Hepatoma-derived growth factor-related protein 2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"C\", \"sequence_length\": 94, \"uniprot_ids\": [\"Q7Z4V5\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 12,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "J",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:9G94:LIG:J:A1D73:101:.",
            "nearest_polypeptide_distance_angstrom": 2.5415,
            "nearest_polypeptide_label_asym_id": "C",
            "occupancy_max": 0.94,
            "occupancy_min": 0.94,
            "pdb_id": "9G94",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"C\", \"auth_seq_id\": \"13\", \"component\": \"ALA\", \"entity_position\": 14, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.7946, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 16, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4535, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 19, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.3784, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"19\", \"component\": \"PRO\", \"entity_position\": 20, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.7336, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 22, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4555, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 45, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.4725, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 48, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.5415, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 50, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 2.5973, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 51, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.238, \"uniprot_position\": null}, {\"auth_asym_id\": \"C\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 52, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 4.2169, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/HDGFL2__HUMAN__Q7Z4V5/Co-Crystals/9G94/original.cif",
            "source_coordinate_sha256": "77cc947e76da8d5e49e56df359b3db472fe81dbdfabfc36f99d53b3c18200802",
            "unique_heavy_atom_names": 12
          },
          "ligand_instance_id": "PDB:9G94:LIG:J:A1D73:101:.",
          "ligand_label_asym_id": "J",
          "minimum_Pfam_distance_angstrom": 2.5415,
          "minimum_chain_distance_angstrom": 2.5415,
          "minimum_core_distance_angstrom": 2.5415,
          "multiple_contacting_mapped_chains": 0,
          "pdb_id": "9G94",
          "protein_id": "UP:Q7Z4V5",
          "protein_label_asym_id": "C",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:9G94:LIG:J:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C",
          "source_coordinate_sha256": "77cc947e76da8d5e49e56df359b3db472fe81dbdfabfc36f99d53b3c18200802"
        }
      ],
      "context_assay_count": 8,
      "context_measured_count": 8,
      "context_bound_count": 2,
      "context_pdb_count": 2,
      "context_negative_count": 4,
      "context_is_probe": false,
      "context_bioactivity_only": false,
      "context_kind": "Measured + bound structure",
      "science": {
        "studied_compound": true,
        "measured_count": 8,
        "structural_research_ligand": true,
        "research_pdb_count": 2,
        "other_component": false,
        "component_site_count": 0,
        "verification_queue": false,
        "positive_direct_binder": true,
        "reported_probe": false,
        "reported_control": false,
        "cellular_activity": false,
        "protein_degradation": false,
        "bioactivity_only": false,
        "research_site_count": 8,
        "unknown_site_count": 0,
        "annotation_roles": [
          "studied",
          "structural"
        ]
      },
      "science_label": "Studied + deposited research ligand",
      "science_profile": {
        "annotation_roles": [
          "studied",
          "structural"
        ],
        "cellular_activity": false,
        "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
        "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
        "entity_kind": "chemical_identity",
        "identity_resolved": true,
        "measured_observation_count": 8,
        "name": "BPP",
        "other_pdb_component": false,
        "other_site_count": 0,
        "positive_direct_binder": true,
        "primary_view": "studied",
        "protein_degradation": false,
        "reported_control": false,
        "reported_probe": false,
        "rule": "Independent source observations + per-site coordinate role, not universal pharmacology",
        "source_observation_ids": [
          "PWWP:ASSAY:0011",
          "PWWP:ASSAY:0012",
          "PWWP:ASSAY:0013",
          "PWWP5:ASSAY:0028",
          "PWWP5:ASSAY:0032",
          "PWWP5:ASSAY:0029",
          "PWWP5:ASSAY:0030",
          "PWWP5:ASSAY:0031"
        ],
        "source_site_ids": [
          "PDB:8Z6C:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A",
          "PDB:9G94:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A",
          "PDB:9G94:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A",
          "PDB:8Z6C:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:B",
          "PDB:9G94:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:B",
          "PDB:8Z6C:LIG:J:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C",
          "PDB:9G94:LIG:J:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C",
          "PDB:8Z6C:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C"
        ],
        "structural_research_ligand": true,
        "structural_research_site_count": 8,
        "studied_compound": true,
        "total_observation_count": 8,
        "uncertain_site_count": 0,
        "uncertainty": "Classification is evidence- and experiment-scoped; missing assays do not prove nonbinding.",
        "verification_queue": false,
        "verification_status": "source_scoped_mixed"
      },
      "science_site_roles": {
        "PDB:8Z6C:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/A1D73",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "a52b0ce0d915a4ec6357f5dce14e0dbbacdb5fa856c24981a9187cf4168156c2",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:8Z6C:LIG:D:A1D73:101:.",
          "observed_other_component": false,
          "pdb_id": "8Z6C",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:8Z6C:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/8Z6C",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:8Z6C:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C": {
          "ccd_url": "https://www.rcsb.org/ligand/A1D73",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "a52b0ce0d915a4ec6357f5dce14e0dbbacdb5fa856c24981a9187cf4168156c2",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:8Z6C:LIG:D:A1D73:101:.",
          "observed_other_component": false,
          "pdb_id": "8Z6C",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:8Z6C:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/8Z6C",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:8Z6C:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:B": {
          "ccd_url": "https://www.rcsb.org/ligand/A1D73",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "a52b0ce0d915a4ec6357f5dce14e0dbbacdb5fa856c24981a9187cf4168156c2",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:8Z6C:LIG:G:A1D73:101:.",
          "observed_other_component": false,
          "pdb_id": "8Z6C",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:8Z6C:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/8Z6C",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:8Z6C:LIG:J:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C": {
          "ccd_url": "https://www.rcsb.org/ligand/A1D73",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "a52b0ce0d915a4ec6357f5dce14e0dbbacdb5fa856c24981a9187cf4168156c2",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:8Z6C:LIG:J:A1D73:101:.",
          "observed_other_component": false,
          "pdb_id": "8Z6C",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:8Z6C:LIG:J:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/8Z6C",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:9G94:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/A1D73",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "77cc947e76da8d5e49e56df359b3db472fe81dbdfabfc36f99d53b3c18200802",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:9G94:LIG:D:A1D73:101:.",
          "observed_other_component": false,
          "pdb_id": "9G94",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:9G94:LIG:D:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/9G94",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:9G94:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/A1D73",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "77cc947e76da8d5e49e56df359b3db472fe81dbdfabfc36f99d53b3c18200802",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:9G94:LIG:G:A1D73:101:.",
          "observed_other_component": false,
          "pdb_id": "9G94",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:9G94:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/9G94",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:9G94:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:B": {
          "ccd_url": "https://www.rcsb.org/ligand/A1D73",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "77cc947e76da8d5e49e56df359b3db472fe81dbdfabfc36f99d53b3c18200802",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:9G94:LIG:G:A1D73:101:.",
          "observed_other_component": false,
          "pdb_id": "9G94",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:9G94:LIG:G:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/9G94",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:9G94:LIG:J:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C": {
          "ccd_url": "https://www.rcsb.org/ligand/A1D73",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "77cc947e76da8d5e49e56df359b3db472fe81dbdfabfc36f99d53b3c18200802",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:9G94:LIG:J:A1D73:101:.",
          "observed_other_component": false,
          "pdb_id": "9G94",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:9G94:LIG:J:A1D73:101:.:SITE:UP:Q7Z4V5:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/9G94",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        }
      },
      "science_assay_roles": {
        "PWWP:ASSAY:0011": {
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "NMR chemical-shift perturbation",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0011",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:Q7Z4V5",
          "remaining_uncertainty": "Intermediate-exchange NMR fit has large fitting error; ITC cross-validation reported, exact separate ITC number not extracted.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S04",
          "source_location": "Results; Figure 1E",
          "source_role": "experimentally_studied_fragment_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
          "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 7.0,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0012": {
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "domain_id": "UP:O75475:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "ITC",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0012",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:O75475",
          "remaining_uncertainty": "Full assay buffer, temperature and incubation metadata not transcribed; null means uncurated, not absent.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S04",
          "source_location": "Results; Figure 4B",
          "source_role": "experimentally_studied_fragment_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
          "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 27.0,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0013": {
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "domain_id": "UP:Q9Y3E1:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "Binding",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0013",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:Q9Y3E1",
          "remaining_uncertainty": "14 ± 2 µM confirmed in primary Results; specific Figure S2 assay method remains unresolved.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S04",
          "source_location": "Results: selectivity paragraph",
          "source_role": "experimentally_studied_fragment_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
          "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 14.0,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP5:ASSAY:0028": {
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "NMR chemical-shift perturbation",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP5:ASSAY:0028",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:Q7Z4V5",
          "remaining_uncertainty": "Y18S mutant measurement; must not be pooled with wild-type affinity. Construct is the source HDGFRP2 PWWP expression fragment (1–93) carrying the stated mutation. Replicate number and titration-specific temperature are not independently specified.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "P5:S:WEI2024",
          "source_location": "Results; Figure 3D",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": "Y18S",
          "units": "mM",
          "value": 0.29,
          "verification_status": "primary_source_verified"
        },
        "PWWP5:ASSAY:0029": {
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "domain_id": "UP:Q49A26:PWWP1",
          "endpoint": "qualitative",
          "evidence_type": "qualitative_binding",
          "explicitly_negative": true,
          "measured": true,
          "method": "Binding selectivity; assay method not verified in Figure S2",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP5:ASSAY:0029",
          "operator": null,
          "positive_direct_binder": false,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:Q49A26",
          "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Protein has the named PWWP domain; this qualitative observation is not an unbounded inactivity claim.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "P5:S:WEI2024",
          "source_location": "Results: selectivity paragraph referring to Figure S2",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": null,
          "value": null,
          "verification_status": "primary_source_verified"
        },
        "PWWP5:ASSAY:0030": {
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "domain_id": "UP:P55201:PWWP1",
          "endpoint": "qualitative",
          "evidence_type": "qualitative_binding",
          "explicitly_negative": true,
          "measured": true,
          "method": "Binding selectivity; assay method not verified in Figure S2",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP5:ASSAY:0030",
          "operator": null,
          "positive_direct_binder": false,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:P55201",
          "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Protein has the named PWWP domain; this qualitative observation is not an unbounded inactivity claim.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "P5:S:WEI2024",
          "source_location": "Results: selectivity paragraph referring to Figure S2",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": null,
          "value": null,
          "verification_status": "primary_source_verified"
        },
        "PWWP5:ASSAY:0031": {
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "domain_id": "UP:Q9UBC3:PWWP1",
          "endpoint": "qualitative",
          "evidence_type": "qualitative_binding",
          "explicitly_negative": true,
          "measured": true,
          "method": "Binding selectivity; assay method not verified in Figure S2",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP5:ASSAY:0031",
          "operator": null,
          "positive_direct_binder": false,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:Q9UBC3",
          "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Protein has the named PWWP domain; this qualitative observation is not an unbounded inactivity claim.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "P5:S:WEI2024",
          "source_location": "Results: selectivity paragraph referring to Figure S2",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": null,
          "value": null,
          "verification_status": "primary_source_verified"
        },
        "PWWP5:ASSAY:0032": {
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "domain_id": null,
          "endpoint": "qualitative",
          "evidence_type": "qualitative_binding",
          "explicitly_negative": true,
          "measured": true,
          "method": "Binding selectivity; assay method not verified in Figure S2",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP5:ASSAY:0032",
          "operator": null,
          "positive_direct_binder": false,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Source says NSD2 PWWP but does not specify PWWP1 versus PWWP2 in the inspected passage; domain_id remains null.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "P5:S:WEI2024",
          "source_location": "Results: selectivity paragraph referring to Figure S2",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "studied_compound": true,
          "target_scope": "domain_unresolved",
          "target_variant": null,
          "units": null,
          "value": null,
          "verification_status": "primary_source_verified"
        }
      },
      "example": {
        "DMSO_percent": null,
        "abstract_reported_endpoint": null,
        "abstract_reported_method": null,
        "abstract_reported_units": null,
        "abstract_reported_value": null,
        "assay_construct_end": 93,
        "assay_construct_start": 1,
        "assay_record_id": "PWWP:ASSAY:0011",
        "assay_type": "NMR chemical-shift perturbation Kd",
        "assay_value_transferred_to_modeled_stereoisomers": 0,
        "audit_decision": "retain_with_explicit_endpoint_and_identity",
        "baseline_assay_record": 1,
        "buffer": "HEPES-buffered saline; exact buffer/salt concentrations not restated in CSP subsection",
        "ccd_id": "A1D73",
        "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
        "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
        "chemical_identity_status": "exact_single_CCD_identity",
        "component_context": null,
        "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
        "compound_name": "BPP",
        "conditions": "{\"fit_model\": \"1:1 binding; global fit with shared Kd\", \"ligand_to_protein_molar_ratio_range\": [0, 6], \"protein_concentration_uM\": 100, \"protein_construct\": \"HDGFL2 1–93\"}",
        "crystallographic_component_ids": null,
        "curation_version": "frozen-v1.2",
        "domain": "PWWP",
        "domain_id": "UP:Q7Z4V5:PWWP1",
        "endpoint": "Kd",
        "endpoint_label_status": null,
        "evidence_class": "direct_binding_affinity",
        "evidence_location": "Results; Figure 1E",
        "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
        "gene": "HDGFL2",
        "interpretation": "Authors report intermediate-exchange limitations and additional ITC validation. This record preserves the NMR value and fitting error.",
        "is_measured": true,
        "is_negative": false,
        "method": "NMR chemical-shift perturbation",
        "molecular_entity_type": "small_molecule_preparation",
        "normalized_exact_uM": 7.0,
        "numeric_transcription_status": "matches_primary_report",
        "numeric_value_inferred_from_structure": 0,
        "organism": "Homo sapiens",
        "pH": 7.4,
        "pdb_id": "8Z6C",
        "preparation_id": "PREP:BPP",
        "protein_id": "UP:Q7Z4V5",
        "publication_year": 2024,
        "qualitative_result": null,
        "reference_id": "PMID:39031937",
        "remaining_uncertainty": "Intermediate-exchange NMR fit has large fitting error; ITC cross-validation reported, exact separate ITC number not extracted.",
        "replicates": null,
        "role": "experimentally_studied_fragment_ligand",
        "source_component_url": null,
        "source_database": "Primary literature (frozen Atlas)",
        "source_id": "S04",
        "source_measurement_key": "d4c00922e7b4cb60789dae0c9cd6d4d76f72574cab8eead4c9a2552558cfebcc",
        "source_original": {
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          "assay_construct_end": 93,
          "assay_construct_start": 1,
          "assay_record_id": "PWWP:ASSAY:0011",
          "assay_type": "NMR chemical-shift perturbation Kd",
          "assay_value_transferred_to_modeled_stereoisomers": 0,
          "audit_decision": "retain_with_explicit_endpoint_and_identity",
          "baseline_assay_record": 1,
          "buffer": "HEPES-buffered saline; exact buffer/salt concentrations not restated in CSP subsection",
          "ccd_id": "A1D73",
          "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "chemical_identity_status": "exact_single_CCD_identity",
          "component_context": null,
          "compound_name": "BPP",
          "conditions": "{\"fit_model\": \"1:1 binding; global fit with shared Kd\", \"ligand_to_protein_molar_ratio_range\": [0, 6], \"protein_concentration_uM\": 100, \"protein_construct\": \"HDGFL2 1–93\"}",
          "crystallographic_component_ids": null,
          "domain": "PWWP",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "endpoint_label_status": null,
          "evidence_class": "direct_binding_affinity",
          "evidence_location": "Results; Figure 1E",
          "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
          "gene": "HDGFL2",
          "interpretation": "Authors report intermediate-exchange limitations and additional ITC validation. This record preserves the NMR value and fitting error.",
          "molecular_entity_type": "small_molecule_preparation",
          "numeric_transcription_status": "matches_primary_report",
          "numeric_value_inferred_from_structure": 0,
          "pH": 7.4,
          "pdb_id": "8Z6C",
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:Q7Z4V5",
          "qualitative_result": null,
          "reference_id": "PMID:39031937",
          "remaining_uncertainty": "Intermediate-exchange NMR fit has large fitting error; ITC cross-validation reported, exact separate ITC number not extracted.",
          "replicates": null,
          "role": "experimentally_studied_fragment_ligand",
          "source_component_url": null,
          "source_id": "S04",
          "source_reported_uncertainty": "5",
          "source_reported_units": "µM",
          "source_reported_value": "7",
          "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
          "temperature_C": null,
          "uncertainty": 5.0,
          "uncertainty_type": "fitting_error",
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          "unit_conversion": null,
          "units": "µM",
          "value": 7.0,
          "value_operator": "=",
          "value_uM": 7.0,
          "verification_level": "primary_full_text_sections_verified"
        },
        "source_reported_uncertainty": "5",
        "source_reported_units": "µM",
        "source_reported_value": "7",
        "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
        "target_scope": "domain_specific",
        "temperature_C": null,
        "uncertainty": 5.0,
        "uncertainty_type": "fitting_error",
        "uncertainty_uM": 5.0,
        "unit_conversion": null,
        "units": "µM",
        "value": 7.0,
        "value_operator": "=",
        "value_uM": 7.0,
        "verification_level": "primary_full_text_sections_verified"
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      "matched_observations": [
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          "DMSO_percent": null,
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            "verification_level": "primary_full_text_sections_verified"
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            "role": "experimentally_studied_fragment_ligand",
            "source_component_url": null,
            "source_id": "S04",
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            "source_reported_units": "µM",
            "source_reported_value": "14",
            "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
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            "verification_level": "primary_full_text_sections_verified"
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          "source_reported_units": "µM",
          "source_reported_value": "14",
          "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
          "target_scope": "domain_specific",
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          "verification_level": "primary_full_text_sections_verified"
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          "evidence_location": "Results; Figure 3D",
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            "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
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          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "target_scope": "domain_specific",
          "target_variant": "Y18S",
          "uncertainty": 0.02,
          "uncertainty_type": "fitting error",
          "uncertainty_uM": 20.0,
          "unit_conversion": "mM × 1000 = µM",
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          "value_operator": "=",
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        },
        {
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          "gene": "GLYR1",
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          "is_measured": true,
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          "negative_evidence_scope": "Non-detectable binding in the source experimental comparison; assay limits not recovered.",
          "normalized_exact_uM": null,
          "numeric_transcription_status": "qualitative_or_not_reported",
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            "numeric_transcription_status": "qualitative_or_not_reported",
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            "uncertainty": null,
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          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
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        },
        {
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          "assay_value_transferred_to_modeled_stereoisomers": false,
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          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_name": "BPP",
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          "domain_id": "UP:P55201:PWWP1",
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          "gene": "BRPF1",
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          "is_measured": true,
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          "negative_evidence_scope": "Non-detectable binding in the source experimental comparison; assay limits not recovered.",
          "normalized_exact_uM": null,
          "numeric_transcription_status": "qualitative_or_not_reported",
          "numeric_value_inferred_from_structure": false,
          "organism": "Homo sapiens",
          "pdb_id": null,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:P55201",
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          "reference_id": "PMID:39031937",
          "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Protein has the named PWWP domain; this qualitative observation is not an unbounded inactivity claim.",
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          "retrieval_date": "2026-10-26",
          "role": "experimentally_studied_ligand",
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          "source_id": "P5:S:WEI2024",
          "source_measurement_key": "8b0073aae5fc1c92500107f909e335ed9da0b5cd65e6267735d56dfaa9bcf493",
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            "numeric_transcription_status": "qualitative_or_not_reported",
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            "pdb_id": null,
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            "protein_id": "UP:P55201",
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            "reference_id": "PMID:39031937",
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            "retrieval_date": "2026-10-26",
            "role": "experimentally_studied_ligand",
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            "source_reported_value": null,
            "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
            "uncertainty": null,
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        },
        {
          "assay_construct_end": null,
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          "chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
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          "domain_id": "UP:Q9UBC3:PWWP1",
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          "gene": "DNMT3B",
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          "negative_evidence_scope": "Non-detectable binding in the source experimental comparison; assay limits not recovered.",
          "normalized_exact_uM": null,
          "numeric_transcription_status": "qualitative_or_not_reported",
          "numeric_value_inferred_from_structure": false,
          "organism": "Homo sapiens",
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          "preparation_id": "PREP:BPP",
          "protein_id": "UP:Q9UBC3",
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          "reference_id": "PMID:39031937",
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          "retrieval_date": "2026-10-26",
          "role": "experimentally_studied_ligand",
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            "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
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            "numeric_transcription_status": "qualitative_or_not_reported",
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            "preparation_id": "PREP:BPP",
            "protein_id": "UP:Q9UBC3",
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            "qualitative_result": "Source reports non-detectable affinity in the tested selectivity comparison.",
            "reference_id": "PMID:39031937",
            "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Protein has the named PWWP domain; this qualitative observation is not an unbounded inactivity claim.",
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            "retrieval_date": "2026-10-26",
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            "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
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          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
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        },
        {
          "assay_construct_end": null,
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          "assay_context": "purified_PWWP_domain_unspecified_instance",
          "assay_organism": "Homo sapiens",
          "assay_record_id": "PWWP5:ASSAY:0032",
          "assay_type": "Binding selectivity; assay method not verified in Figure S2",
          "assay_value_transferred_to_modeled_stereoisomers": false,
          "ccd_id": null,
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          "compound_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
          "compound_name": "BPP",
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          "curation_version": "phase5-1.0.0",
          "domain": null,
          "domain_id": null,
          "endpoint": "qualitative",
          "evidence_class": "qualitative_binding",
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          "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
          "gene": "NSD2",
          "inclusion_rationale": "Primary source explicitly identifies this preparation, target context and observation.",
          "is_measured": true,
          "is_negative": true,
          "method": "Binding selectivity; assay method not verified in Figure S2",
          "negative_evidence_scope": "Non-detectable binding in the source experimental comparison; assay limits not recovered.",
          "normalized_exact_uM": null,
          "numeric_transcription_status": "qualitative_or_not_reported",
          "numeric_value_inferred_from_structure": false,
          "organism": "Homo sapiens",
          "pdb_id": null,
          "preparation_id": "PREP:BPP",
          "protein_id": "UP:O96028",
          "publication_year": 2024,
          "qualitative_result": "Source reports non-detectable affinity in the tested selectivity comparison.",
          "reference_id": "PMID:39031937",
          "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Source says NSD2 PWWP but does not specify PWWP1 versus PWWP2 in the inspected passage; domain_id remains null.",
          "replicates": null,
          "retrieval_date": "2026-10-26",
          "role": "experimentally_studied_ligand",
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          "source_measurement_key": "547aaaaad799d3248757429cbab8a53de50effe040eaddcef5fb1e1884e970cd",
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            "endpoint": "qualitative",
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            "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
            "gene": "NSD2",
            "inclusion_rationale": "Primary source explicitly identifies this preparation, target context and observation.",
            "is_negative": true,
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            "numeric_transcription_status": "qualitative_or_not_reported",
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            "pdb_id": null,
            "preparation_id": "PREP:BPP",
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            "publication_year": 2024,
            "qualitative_result": "Source reports non-detectable affinity in the tested selectivity comparison.",
            "reference_id": "PMID:39031937",
            "remaining_uncertainty": "No concentration limit, numeric Kd, assay method or construct boundaries assigned without original Supplementary Figure S2. Source says NSD2 PWWP but does not specify PWWP1 versus PWWP2 in the inspected passage; domain_id remains null.",
            "replicates": null,
            "retrieval_date": "2026-10-26",
            "role": "experimentally_studied_ligand",
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            "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
            "uncertainty": null,
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          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "target_scope": "domain_unresolved",
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          "units": null,
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          "verification_level": "primary_source_verified",
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      ],
      "matched_assay_count": 8
    },
    {
      "aliases": [
        "compound 1 (de Freitas 2021)"
      ],
      "assay_count": 2,
      "associated_pdb_ids": [],
      "bound_structure_count": 0,
      "category": "Bioactivity only",
      "chemical_id": null,
      "classifications": [
        "Preparation identity unresolved"
      ],
      "compound_id": "PREP:DEFREITAS2021_1",
      "curation_version": "phase5-1.0.0",
      "development_status": "Not independently curated",
      "domain_ids": [
        "UP:O96028:PWWP1"
      ],
      "entity_kind": "experimental_preparation",
      "genes": [
        "NSD2"
      ],
      "has_bioactivity_only": true,
      "has_source_conflict": false,
      "identity": null,
      "identity_note": "The source describes two stereocenters, one diastereoisomer and equipotent enantiomers. The measured preparation is retained without assigning an exact enantiomeric identity or composition.",
      "identity_resolved": false,
      "is_control": false,
      "is_probe": false,
      "measured_observation_count": 2,
      "name": "compound 1 (de Freitas 2021)",
      "negative_count": 0,
      "observation_ids": [
        "PWWP5:ASSAY:0033",
        "PWWP5:ASSAY:0034"
      ],
      "pdb_structure_count": 0,
      "preparation_count": 1,
      "preparation_ids": [
        "PREP:DEFREITAS2021_1"
      ],
      "protein_ids": [
        "UP:O96028"
      ],
      "relationships": [],
      "relevant": true,
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        }
      ],
      "matched_assay_count": 3
    },
    {
      "aliases": [
        "compound 12 (Collie 2025)"
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      "assay_count": 4,
      "associated_pdb_ids": [],
      "bound_structure_count": 0,
      "category": "Bioactivity only",
      "chemical_id": null,
      "classifications": [
        "Negative / censored observations",
        "Preparation identity unresolved"
      ],
      "compound_id": "PREP:COLLIE2025_12",
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      "entity_kind": "experimental_preparation",
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        "NSD2",
        "NSD3"
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      "has_bioactivity_only": true,
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      "identity": null,
      "identity_note": "Separated compound 11 fraction labelled isomer 1; retention time 7.1 min, reported dr 98.84:1.16. Absolute sulfolane assignment and exact CCD mapping remain unresolved; no affinity transfer from compound 11.",
      "identity_resolved": false,
      "is_control": false,
      "is_probe": false,
      "measured_observation_count": 4,
      "name": "compound 12 (Collie 2025)",
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        "PWWP:ASSAY:0019",
        "PWWP:ASSAY:0026",
        "PWWP:ASSAY:0030",
        "PWWP11:ASSAY:0006"
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      "pdb_structure_count": 0,
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      "preparation_ids": [
        "PREP:COLLIE2025_12"
      ],
      "protein_ids": [
        "UP:O96028",
        "UP:Q9BZ95"
      ],
      "relationships": [],
      "relevant": true,
      "search_text": "compound 12 (collie 2025) prep:collie2025_12 compound 12 (collie 2025) nsd2 nsd3 up:o96028:pwwp1 up:q9bz95:pwwp1 {} pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/",
      "source_urls": [
        "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/"
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      "verification_pending": false,
      "context_observations": [
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      "context_measured_count": 4,
      "context_bound_count": 0,
      "context_pdb_count": 0,
      "context_negative_count": 1,
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      "context_bioactivity_only": true,
      "context_kind": "Bioactivity only",
      "science": {
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        "verification_status": "source_scoped_mixed"
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      "science_site_roles": {},
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          "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
          "role": "experimentally_studied_ligand",
          "source_component_url": null,
          "source_database": "Primary literature (frozen Atlas)",
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            "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
            "role": "experimentally_studied_ligand",
            "source_component_url": null,
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            "source_reported_units": "µM",
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            "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
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          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
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          "chemical_identity_status": "paper_label_exact_identity_unresolved",
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          "compound_id": "PREP:COLLIE2025_12",
          "compound_name": "compound 12 (Collie 2025)",
          "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD2 208–368\", \"purified_tags\": \"N-terminal Avi; C-terminal 6His; biotinylated\", \"replicates\": 2, \"uncertainty_type\": \"SEM\"}",
          "crystallographic_component_ids": null,
          "curation_version": "frozen-v1.2",
          "domain": "PWWP1",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "IC50",
          "endpoint_label_status": null,
          "evidence_class": "biochemical_interaction_inhibition",
          "evidence_location": "Table 1",
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          "gene": "NSD2",
          "interpretation": "Probe displacement from the H3K36me2 binding site; not catalytic SET-domain inhibition.",
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          "protein_id": "UP:O96028",
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          "replicates": "2",
          "role": "experimentally_studied_ligand",
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            "domain": "PWWP1",
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            "replicates": "2",
            "role": "experimentally_studied_ligand",
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            "source_reported_units": "µM",
            "source_reported_value": "2.49",
            "source_verification_scope": "Phase 3 primary Table 1 and actual Collie supporting PDF pages 7, 9 and 14; Carlino supporting PDF contents inspected, but the inherited main-article HTRF method remains not inspected after documented access attempts.",
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          "curation_version": "frozen-v1.2",
          "domain": "PWWP1",
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          "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
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          "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
          "role": "counter_target_assay",
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          "source_database": "Primary literature (frozen Atlas)",
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            "domain": "PWWP1",
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            "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
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        }
      ],
      "matched_assay_count": 4
    },
    {
      "aliases": [
        "compound 13 (Collie 2025)"
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      "assay_count": 4,
      "associated_pdb_ids": [],
      "bound_structure_count": 0,
      "category": "Bioactivity only",
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        "Negative / censored observations",
        "Preparation identity unresolved"
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      "compound_id": "PREP:COLLIE2025_13",
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        "NSD3"
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      "has_bioactivity_only": true,
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      "identity_note": "Separated compound 11 fraction labelled isomer 2; retention time 8.2 min, reported dr 97.10:2.90. Absolute sulfolane assignment and exact CCD mapping remain unresolved; no affinity transfer from compound 11.",
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        "PWWP:ASSAY:0020",
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        "PWWP11:ASSAY:0007"
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      "protein_ids": [
        "UP:O96028",
        "UP:Q9BZ95"
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      "relationships": [],
      "relevant": true,
      "search_text": "compound 13 (collie 2025) prep:collie2025_13 compound 13 (collie 2025) nsd2 nsd3 up:o96028:pwwp1 up:q9bz95:pwwp1 {} pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/",
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      "verification_pending": false,
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      "context_measured_count": 4,
      "context_bound_count": 0,
      "context_pdb_count": 0,
      "context_negative_count": 1,
      "context_is_probe": false,
      "context_bioactivity_only": true,
      "context_kind": "Bioactivity only",
      "science": {
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        "other_component": false,
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        ],
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        "verification_status": "source_scoped_mixed"
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      "science_site_roles": {},
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          "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
          "role": "experimentally_studied_ligand",
          "source_component_url": null,
          "source_database": "Primary literature (frozen Atlas)",
          "source_id": "S05",
          "source_measurement_key": "23dff55b7536c9d14f9e3fdd76f3c65682b87c47dfefba76a8520ced61390d22",
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          "domain": "PWWP1",
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        }
      ],
      "matched_assay_count": 4
    },
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      "aliases": [
        "compound 5 (Collie 2025)"
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        "Negative / censored observations",
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      "has_bioactivity_only": true,
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      "protein_ids": [
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      "relationships": [],
      "relevant": true,
      "search_text": "compound 5 (collie 2025) prep:collie2025_5 compound 5 (collie 2025) nsd2 nsd3 up:o96028:pwwp1 up:q9bz95:pwwp1 {} pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/",
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            "chemical_identity_status": "paper_label_exact_identity_unresolved",
            "component_context": null,
            "compound_name": "compound 6 (Collie 2025)",
            "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD2 208–368\", \"purified_tags\": \"N-terminal Avi; C-terminal 6His; biotinylated\", \"replicates\": 2, \"uncertainty_type\": \"SEM\"}",
            "crystallographic_component_ids": null,
            "domain": "PWWP1",
            "domain_id": "UP:O96028:PWWP1",
            "endpoint_label_status": null,
            "evidence_class": "biochemical_interaction_inhibition",
            "evidence_location": "Table 1",
            "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
            "gene": "NSD2",
            "interpretation": "Probe displacement from the H3K36me2 binding site; not catalytic SET-domain inhibition.",
            "molecular_entity_type": "small_molecule_preparation",
            "numeric_transcription_status": "matches_primary_report",
            "numeric_value_inferred_from_structure": 0,
            "pH": null,
            "pdb_id": null,
            "preparation_id": "PREP:COLLIE2025_6",
            "protein_id": "UP:O96028",
            "qualitative_result": null,
            "reference_id": "PMID:40959233",
            "remaining_uncertainty": "HTRF full conditions are referenced to Carlino et al. 2024 DOI 10.1021/acs.jmedchem.4c00215. Its main protocol remains inaccessible after official repository checks. The actual supplement was inspected but contains no HTRF protocol. Table 1 reports SEM; independence level of HTRF replicates is not specified.",
            "replicates": "2",
            "role": "experimentally_studied_ligand",
            "source_component_url": null,
            "source_id": "S05",
            "source_reported_uncertainty": "0.08",
            "source_reported_units": "µM",
            "source_reported_value": "1.24",
            "source_verification_scope": "Phase 3 primary Table 1 and actual Collie supporting PDF pages 7, 9 and 14; Carlino supporting PDF contents inspected, but the inherited main-article HTRF method remains not inspected after documented access attempts.",
            "temperature_C": null,
            "uncertainty": 0.08,
            "uncertainty_type": "SEM",
            "uncertainty_uM": 0.08,
            "unit_conversion": null,
            "units": "µM",
            "value": 1.24,
            "value_operator": "=",
            "value_uM": 1.24,
            "verification_level": "primary_full_text_sections_verified"
          },
          "source_reported_uncertainty": "0.08",
          "source_reported_units": "µM",
          "source_reported_value": "1.24",
          "source_verification_scope": "Phase 3 primary Table 1 and actual Collie supporting PDF pages 7, 9 and 14; Carlino supporting PDF contents inspected, but the inherited main-article HTRF method remains not inspected after documented access attempts.",
          "target_scope": "domain_specific",
          "temperature_C": null,
          "uncertainty": 0.08,
          "uncertainty_type": "SEM",
          "uncertainty_uM": 0.08,
          "unit_conversion": null,
          "units": "µM",
          "value": 1.24,
          "value_operator": "=",
          "value_uM": 1.24,
          "verification_level": "primary_full_text_sections_verified"
        },
        {
          "DMSO_percent": 0.3,
          "abstract_reported_endpoint": null,
          "abstract_reported_method": null,
          "abstract_reported_units": null,
          "abstract_reported_value": null,
          "assay_construct_end": 398,
          "assay_construct_start": 263,
          "assay_record_id": "PWWP11:ASSAY:0003",
          "assay_type": "SPR Kd counter-screen",
          "assay_value_transferred_to_modeled_stereoisomers": 0,
          "audit_decision": null,
          "baseline_assay_record": 0,
          "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.1 mM TCEP; 0.05% (w/v) Tween-20; 0.3% (v/v) DMSO",
          "ccd_id": null,
          "ccd_mapping_source": null,
          "chemical_id": null,
          "chemical_identity_status": "paper_label_exact_identity_unresolved",
          "component_context": null,
          "compound_id": "PREP:COLLIE2025_6",
          "compound_name": "compound 6 (Collie 2025)",
          "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD3 263–398\", \"purified_tags\": \"N-terminal 6His-TEV retained\"}",
          "crystallographic_component_ids": null,
          "curation_version": "frozen-v1.2",
          "domain": "PWWP1",
          "domain_id": "UP:Q9BZ95:PWWP1",
          "endpoint": "Kd",
          "endpoint_label_status": null,
          "evidence_class": "censored_binding_limit",
          "evidence_location": "Table 1 NSD3 (263–398) column",
          "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "gene": "NSD3",
          "interpretation": "Single counter-target experiment; not evidence of proteome-wide selectivity. No-binding rows have no inferred numerical threshold.",
          "is_measured": true,
          "is_negative": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "normalized_exact_uM": null,
          "numeric_transcription_status": "matches_primary_table",
          "numeric_value_inferred_from_structure": null,
          "organism": "Homo sapiens",
          "pH": 7.5,
          "pdb_id": null,
          "preparation_id": "PREP:COLLIE2025_6",
          "protein_id": "UP:Q9BZ95",
          "publication_year": 2025,
          "qualitative_result": null,
          "reference_id": "PMID:40959233",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
          "role": "counter_target_assay",
          "source_component_url": null,
          "source_database": "Primary literature (frozen Atlas)",
          "source_id": "S05",
          "source_measurement_key": "d4512cced0c78207e81d56358ee09b07aeb4faf6f0e309cbbbad81f8d4babeb0",
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            "DMSO_percent": 0.3,
            "abstract_reported_endpoint": null,
            "abstract_reported_method": null,
            "abstract_reported_units": null,
            "abstract_reported_value": null,
            "assay_construct_end": 398,
            "assay_construct_start": 263,
            "assay_record_id": "PWWP11:ASSAY:0003",
            "assay_type": "SPR Kd counter-screen",
            "assay_value_transferred_to_modeled_stereoisomers": 0,
            "audit_decision": null,
            "baseline_assay_record": 0,
            "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.1 mM TCEP; 0.05% (w/v) Tween-20; 0.3% (v/v) DMSO",
            "ccd_id": null,
            "ccd_mapping_source": null,
            "chemical_id": null,
            "chemical_identity_status": "paper_label_exact_identity_unresolved",
            "component_context": null,
            "compound_name": "compound 6 (Collie 2025)",
            "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD3 263–398\", \"purified_tags\": \"N-terminal 6His-TEV retained\"}",
            "crystallographic_component_ids": null,
            "domain": "PWWP1",
            "domain_id": "UP:Q9BZ95:PWWP1",
            "endpoint_label_status": null,
            "evidence_class": "censored_binding_limit",
            "evidence_location": "Table 1 NSD3 (263–398) column",
            "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
            "gene": "NSD3",
            "interpretation": "Single counter-target experiment; not evidence of proteome-wide selectivity. No-binding rows have no inferred numerical threshold.",
            "molecular_entity_type": "small_molecule_preparation",
            "numeric_transcription_status": "matches_primary_table",
            "numeric_value_inferred_from_structure": null,
            "pH": 7.5,
            "pdb_id": null,
            "preparation_id": "PREP:COLLIE2025_6",
            "protein_id": "UP:Q9BZ95",
            "qualitative_result": null,
            "reference_id": "PMID:40959233",
            "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
            "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
            "role": "counter_target_assay",
            "source_component_url": null,
            "source_id": "S05",
            "source_reported_uncertainty": null,
            "source_reported_units": null,
            "source_reported_value": null,
            "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
            "temperature_C": 25,
            "uncertainty": null,
            "uncertainty_type": null,
            "uncertainty_uM": null,
            "unit_conversion": null,
            "units": "µM",
            "value": 30.0,
            "value_operator": ">",
            "value_uM": 30.0,
            "verification_level": null
          },
          "source_reported_uncertainty": null,
          "source_reported_units": null,
          "source_reported_value": null,
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "target_scope": "domain_specific",
          "temperature_C": 25,
          "uncertainty": null,
          "uncertainty_type": null,
          "uncertainty_uM": null,
          "unit_conversion": null,
          "units": "µM",
          "value": 30.0,
          "value_operator": ">",
          "value_uM": 30.0,
          "verification_level": null
        }
      ],
      "context_structures": [],
      "context_assay_count": 4,
      "context_measured_count": 4,
      "context_bound_count": 0,
      "context_pdb_count": 0,
      "context_negative_count": 1,
      "context_is_probe": false,
      "context_bioactivity_only": true,
      "context_kind": "Bioactivity only",
      "science": {
        "studied_compound": true,
        "measured_count": 4,
        "structural_research_ligand": false,
        "research_pdb_count": 0,
        "other_component": false,
        "component_site_count": 0,
        "verification_queue": true,
        "positive_direct_binder": true,
        "reported_probe": false,
        "reported_control": false,
        "cellular_activity": false,
        "protein_degradation": false,
        "bioactivity_only": true,
        "research_site_count": 0,
        "unknown_site_count": 0,
        "annotation_roles": [
          "studied",
          "unresolved"
        ]
      },
      "science_label": "Studied · no deposited PWWP research ligand",
      "science_profile": {
        "annotation_roles": [
          "studied",
          "unresolved"
        ],
        "cellular_activity": false,
        "chemical_id": null,
        "compound_id": "PREP:COLLIE2025_6",
        "entity_kind": "experimental_preparation",
        "identity_resolved": false,
        "measured_observation_count": 4,
        "name": "compound 6 (Collie 2025)",
        "other_pdb_component": false,
        "other_site_count": 0,
        "positive_direct_binder": true,
        "primary_view": "studied",
        "protein_degradation": false,
        "reported_control": false,
        "reported_probe": false,
        "rule": "Independent source observations + per-site coordinate role, not universal pharmacology",
        "source_observation_ids": [
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          "PWWP:ASSAY:0016",
          "PWWP11:ASSAY:0003",
          "PWWP:ASSAY:0028"
        ],
        "source_site_ids": [],
        "structural_research_ligand": false,
        "structural_research_site_count": 0,
        "studied_compound": true,
        "total_observation_count": 4,
        "uncertain_site_count": 0,
        "uncertainty": "Classification is evidence- and experiment-scoped; missing assays do not prove nonbinding.",
        "verification_queue": true,
        "verification_status": "source_scoped_mixed"
      },
      "science_site_roles": {},
      "science_assay_roles": {
        "PWWP:ASSAY:0016": {
          "chemical_id": null,
          "compound_id": "PREP:COLLIE2025_6",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0016",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:COLLIE2025_6",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 0.71,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0023": {
          "chemical_id": null,
          "compound_id": "PREP:COLLIE2025_6",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0023",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:COLLIE2025_6",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
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          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 5.83,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0028": {
          "chemical_id": null,
          "compound_id": "PREP:COLLIE2025_6",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "IC50",
          "evidence_type": "biochemical_function",
          "explicitly_negative": false,
          "measured": true,
          "method": "HTRF displacement",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0028",
          "operator": "=",
          "positive_direct_binder": false,
          "preparation_id": "PREP:COLLIE2025_6",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "HTRF full conditions are referenced to Carlino et al. 2024 DOI 10.1021/acs.jmedchem.4c00215. Its main protocol remains inaccessible after official repository checks. The actual supplement was inspected but contains no HTRF protocol. Table 1 reports SEM; independence level of HTRF replicates is not specified.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual Collie supporting PDF pages 7, 9 and 14; Carlino supporting PDF contents inspected, but the inherited main-article HTRF method remains not inspected after documented access attempts.",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 1.24,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP11:ASSAY:0003": {
          "chemical_id": null,
          "compound_id": "PREP:COLLIE2025_6",
          "domain_id": "UP:Q9BZ95:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "censored_binding",
          "explicitly_negative": true,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP11:ASSAY:0003",
          "operator": ">",
          "positive_direct_binder": false,
          "preparation_id": "PREP:COLLIE2025_6",
          "protein_id": "UP:Q9BZ95",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1 NSD3 (263–398) column",
          "source_role": "counter_target_assay",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 30.0,
          "verification_status": "source_scope_unresolved"
        }
      },
      "example": {
        "DMSO_percent": 0.3,
        "abstract_reported_endpoint": null,
        "abstract_reported_method": null,
        "abstract_reported_units": null,
        "abstract_reported_value": null,
        "assay_construct_end": 368,
        "assay_construct_start": 208,
        "assay_record_id": "PWWP:ASSAY:0016",
        "assay_type": "SPR Kd",
        "assay_value_transferred_to_modeled_stereoisomers": 0,
        "audit_decision": "retain_with_explicit_endpoint_and_identity",
        "baseline_assay_record": 1,
        "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.1 mM TCEP; 0.05% (w/v) Tween-20; 0.3% (v/v) DMSO",
        "ccd_id": null,
        "ccd_mapping_source": null,
        "chemical_id": null,
        "chemical_identity_status": "paper_label_exact_identity_unresolved",
        "component_context": null,
        "compound_id": "PREP:COLLIE2025_6",
        "compound_name": "compound 6 (Collie 2025)",
        "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD2 208–368\", \"purified_tags\": \"N-terminal Avi; C-terminal 6His; biotinylated\", \"replicates\": \"at least 3\", \"uncertainty_type\": \"SD\"}",
        "crystallographic_component_ids": null,
        "curation_version": "frozen-v1.2",
        "domain": "PWWP1",
        "domain_id": "UP:O96028:PWWP1",
        "endpoint": "Kd",
        "endpoint_label_status": null,
        "evidence_class": "direct_binding_affinity",
        "evidence_location": "Table 1",
        "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
        "gene": "NSD2",
        "interpretation": "Affinity pertains to assay construct; crystal mutations and boundaries are separately recorded.",
        "is_measured": true,
        "is_negative": false,
        "method": "SPR",
        "molecular_entity_type": "small_molecule_preparation",
        "normalized_exact_uM": 0.71,
        "numeric_transcription_status": "matches_primary_report",
        "numeric_value_inferred_from_structure": 0,
        "organism": "Homo sapiens",
        "pH": 7.5,
        "pdb_id": null,
        "preparation_id": "PREP:COLLIE2025_6",
        "protein_id": "UP:O96028",
        "publication_year": 2025,
        "qualitative_result": null,
        "reference_id": "PMID:40959233",
        "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
        "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
        "role": "experimentally_studied_ligand",
        "source_component_url": null,
        "source_database": "Primary literature (frozen Atlas)",
        "source_id": "S05",
        "source_measurement_key": "b12707995efe95fd63e6037dc199e7dc640b7c6cde4545193fd965846d217298",
        "source_original": {
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          "abstract_reported_endpoint": null,
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          "abstract_reported_units": null,
          "abstract_reported_value": null,
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          "assay_construct_start": 208,
          "assay_record_id": "PWWP:ASSAY:0016",
          "assay_type": "SPR Kd",
          "assay_value_transferred_to_modeled_stereoisomers": 0,
          "audit_decision": "retain_with_explicit_endpoint_and_identity",
          "baseline_assay_record": 1,
          "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.1 mM TCEP; 0.05% (w/v) Tween-20; 0.3% (v/v) DMSO",
          "ccd_id": null,
          "ccd_mapping_source": null,
          "chemical_id": null,
          "chemical_identity_status": "paper_label_exact_identity_unresolved",
          "component_context": null,
          "compound_name": "compound 6 (Collie 2025)",
          "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD2 208–368\", \"purified_tags\": \"N-terminal Avi; C-terminal 6His; biotinylated\", \"replicates\": \"at least 3\", \"uncertainty_type\": \"SD\"}",
          "crystallographic_component_ids": null,
          "domain": "PWWP1",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint_label_status": null,
          "evidence_class": "direct_binding_affinity",
          "evidence_location": "Table 1",
          "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "gene": "NSD2",
          "interpretation": "Affinity pertains to assay construct; crystal mutations and boundaries are separately recorded.",
          "molecular_entity_type": "small_molecule_preparation",
          "numeric_transcription_status": "matches_primary_report",
          "numeric_value_inferred_from_structure": 0,
          "pH": 7.5,
          "pdb_id": null,
          "preparation_id": "PREP:COLLIE2025_6",
          "protein_id": "UP:O96028",
          "qualitative_result": null,
          "reference_id": "PMID:40959233",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
          "role": "experimentally_studied_ligand",
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      "relationships": [],
      "relevant": true,
      "search_text": "compound 7 (collie 2025) inchikey:hhacexllnhjlft-inizcteosa-n 1-[[(2~{s})-1-[4-[ethyl(pyridin-4-ylmethyl)amino]-6-methyl-pyrimidin-2-yl]pyrrolidin-2-yl]methyl]urea compound 7 (collie 2025) nsd2 nsd3 up:o96028:pwwp1 up:q9bz95:pwwp1 9foe {\"aliases\":[\"1-[[(2~{s})-1-[4-[ethyl(pyridin-4-ylmethyl)amino]-6-methyl-pyrimidin-2-yl]pyrrolidin-2-yl]methyl]urea\"],\"ccd_ids\":[\"a1ief\"],\"ccd_names\":\"[\\\"1-[[(2~{s})-1-[4-[ethyl(pyridin-4-ylmethyl)amino]-6-methyl-pyrimidin-2-yl]pyrrolidin-2-yl]methyl]urea\\\"]\",\"ccd_types\":\"[\\\"non-polymer\\\"]\",\"chemical_id\":\"inchikey:hhacexllnhjlft-inizcteosa-n\",\"connectivity_block\":\"hhacexllnhjlft\",\"curated_source_sha256\":null,\"curation_version\":\"frozen-v1.2\",\"external_identifiers\":{},\"formal_charge_by_ccd\":\"{\\\"a1ief\\\": 0}\",\"formulae\":\"[\\\"c19 h27 n7 o\\\"]\",\"geometry_note\":\"ccd ideal sdf is a reference chemical geometry, not a deposited bound pose.\",\"identity_status\":\"complete_deposited_inchikey\",\"inchikey\":\"hhacexllnhjlft-inizcteosa-n\",\"inventory_origin\":\"v1_ccd_inventory\",\"isomeric_smiles\":\"ccn(cc1ccncc1)c2cc(nc(n2)n3ccc[c@h]3cnc(=o)n)c\",\"primary_name\":\"1-[[(2~{s})-1-[4-[ethyl(pyridin-4-ylmethyl)amino]-6-methyl-pyrimidin-2-yl]pyrrolidin-2-yl]methyl]urea\",\"retrieval_date\":\"2026-10-24\",\"smiles_stereo_by_ccd\":\"{\\\"a1ief\\\": \\\"ccn(cc1ccncc1)c2cc(nc(n2)n3ccc[c@h]3cnc(=o)n)c\\\"}\",\"source_metadata_sha256\":\"{\\\"a1ief\\\": \\\"4a823beea94f9176b22d2c2cf26400c5afa4f9e6ae4c31a6a18a969d957e008f\\\"}\",\"source_urls\":[\"https://www.rcsb.org/ligand/a1ief\"]} pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/ pmid:40959233 2025 https://pmc.ncbi.nlm.nih.gov/articles/pmc12434523/",
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            "source_reported_value": "0.76",
            "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
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            "unit_conversion": null,
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          "curation_version": "frozen-v1.2",
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          "contact_class": "native_annotation_core_contact",
          "contact_distance_rank": 1,
          "core_contacts_5A": "[{\"auth_asym_id\": \"A\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 27, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.3377, \"uniprot_position\": 230}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 30, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4165, \"uniprot_position\": 233}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"234\", \"component\": \"PRO\", \"entity_position\": 31, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.7262, \"uniprot_position\": 234}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 33, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3973, \"uniprot_position\": 236}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 63, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4717, \"uniprot_position\": 266}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 64, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.7848, \"uniprot_position\": 267}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 65, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6954, \"uniprot_position\": 268}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 66, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4123, \"uniprot_position\": 269}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 67, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.2268, \"uniprot_position\": 270}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 69, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.1245, \"uniprot_position\": 272}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 70, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.3528, \"uniprot_position\": 273}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 71, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.8749, \"uniprot_position\": 274}]",
          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"A\"]",
            "auth_seq_id": "401",
            "ccd_id": "A1IEF",
            "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"A\", \"sequence_length\": 174, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 27,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "B",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:9FOE:LIG:B:A1IEF:401:.",
            "nearest_polypeptide_distance_angstrom": 3.1245,
            "nearest_polypeptide_label_asym_id": "A",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "9FOE",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"A\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 27, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.3377, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 30, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4165, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"234\", \"component\": \"PRO\", \"entity_position\": 31, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.7262, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 33, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3973, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 63, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4717, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 64, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.7848, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 65, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6954, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 66, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4123, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 67, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.2268, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 69, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.1245, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 70, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.3528, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 71, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.8749, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"318\", \"component\": \"LEU\", \"entity_position\": 115, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.9402, \"uniprot_position\": null}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 118, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.4515, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/9FOE/original.cif",
            "source_coordinate_sha256": "f2b013ad297bf526cad83328b7e95e1b56e2e8ecd819ac082835ffadc0108034",
            "unique_heavy_atom_names": 27
          },
          "ligand_instance_id": "PDB:9FOE:LIG:B:A1IEF:401:.",
          "ligand_label_asym_id": "B",
          "minimum_Pfam_distance_angstrom": 3.1245,
          "minimum_chain_distance_angstrom": 3.1245,
          "minimum_core_distance_angstrom": 3.1245,
          "multiple_contacting_mapped_chains": 0,
          "pdb_id": "9FOE",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "A",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:9FOE:LIG:B:A1IEF:401:.:SITE:UP:O96028:PWWP1:A",
          "source_coordinate_sha256": "f2b013ad297bf526cad83328b7e95e1b56e2e8ecd819ac082835ffadc0108034"
        }
      ],
      "context_assay_count": 4,
      "context_measured_count": 4,
      "context_bound_count": 1,
      "context_pdb_count": 1,
      "context_negative_count": 1,
      "context_is_probe": false,
      "context_bioactivity_only": false,
      "context_kind": "Measured + bound structure",
      "science": {
        "studied_compound": true,
        "measured_count": 4,
        "structural_research_ligand": true,
        "research_pdb_count": 1,
        "other_component": false,
        "component_site_count": 0,
        "verification_queue": false,
        "positive_direct_binder": true,
        "reported_probe": false,
        "reported_control": false,
        "cellular_activity": false,
        "protein_degradation": false,
        "bioactivity_only": false,
        "research_site_count": 1,
        "unknown_site_count": 0,
        "annotation_roles": [
          "studied",
          "structural"
        ]
      },
      "science_label": "Studied + deposited research ligand",
      "science_profile": {
        "annotation_roles": [
          "studied",
          "structural"
        ],
        "cellular_activity": false,
        "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
        "compound_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
        "entity_kind": "chemical_identity",
        "identity_resolved": true,
        "measured_observation_count": 4,
        "name": "compound 7 (Collie 2025)",
        "other_pdb_component": false,
        "other_site_count": 0,
        "positive_direct_binder": true,
        "primary_view": "studied",
        "protein_degradation": false,
        "reported_control": false,
        "reported_probe": false,
        "rule": "Independent source observations + per-site coordinate role, not universal pharmacology",
        "source_observation_ids": [
          "PWWP:ASSAY:0024",
          "PWWP:ASSAY:0017",
          "PWWP11:ASSAY:0004",
          "PWWP:ASSAY:0029"
        ],
        "source_site_ids": [
          "PDB:9FOE:LIG:B:A1IEF:401:.:SITE:UP:O96028:PWWP1:A"
        ],
        "structural_research_ligand": true,
        "structural_research_site_count": 1,
        "studied_compound": true,
        "total_observation_count": 4,
        "uncertain_site_count": 0,
        "uncertainty": "Classification is evidence- and experiment-scoped; missing assays do not prove nonbinding.",
        "verification_queue": false,
        "verification_status": "source_scoped_mixed"
      },
      "science_site_roles": {
        "PDB:9FOE:LIG:B:A1IEF:401:.:SITE:UP:O96028:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/A1IEF",
          "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "compound_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "f2b013ad297bf526cad83328b7e95e1b56e2e8ecd819ac082835ffadc0108034",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:9FOE:LIG:B:A1IEF:401:.",
          "observed_other_component": false,
          "pdb_id": "9FOE",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:9FOE:LIG:B:A1IEF:401:.:SITE:UP:O96028:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/9FOE",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        }
      },
      "science_assay_roles": {
        "PWWP:ASSAY:0017": {
          "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "compound_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0017",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:COLLIE2025_7",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 0.15,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0024": {
          "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "compound_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0024",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:COLLIE2025_7",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 0.76,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP:ASSAY:0029": {
          "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "compound_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "IC50",
          "evidence_type": "biochemical_function",
          "explicitly_negative": false,
          "measured": true,
          "method": "HTRF displacement",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0029",
          "operator": "=",
          "positive_direct_binder": false,
          "preparation_id": "PREP:COLLIE2025_7",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "HTRF full conditions are referenced to Carlino et al. 2024 DOI 10.1021/acs.jmedchem.4c00215. Its main protocol remains inaccessible after official repository checks. The actual supplement was inspected but contains no HTRF protocol. Table 1 reports SEM; independence level of HTRF replicates is not specified.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual Collie supporting PDF pages 7, 9 and 14; Carlino supporting PDF contents inspected, but the inherited main-article HTRF method remains not inspected after documented access attempts.",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 0.21,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP11:ASSAY:0004": {
          "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "compound_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "domain_id": "UP:Q9BZ95:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "censored_binding",
          "explicitly_negative": true,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP11:ASSAY:0004",
          "operator": ">",
          "positive_direct_binder": false,
          "preparation_id": "PREP:COLLIE2025_7",
          "protein_id": "UP:Q9BZ95",
          "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S05",
          "source_location": "Table 1 NSD3 (263–398) column",
          "source_role": "counter_target_assay",
          "source_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
          "source_verification_scope": "Phase 3 primary Table 1 and actual supporting PDF pages 7, 9 and 14; the inherited HTRF method remains explicitly not inspected",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 30.0,
          "verification_status": "source_scope_unresolved"
        }
      },
      "example": {
        "DMSO_percent": 0.3,
        "abstract_reported_endpoint": null,
        "abstract_reported_method": null,
        "abstract_reported_units": null,
        "abstract_reported_value": null,
        "assay_construct_end": 368,
        "assay_construct_start": 208,
        "assay_record_id": "PWWP:ASSAY:0017",
        "assay_type": "SPR Kd",
        "assay_value_transferred_to_modeled_stereoisomers": 0,
        "audit_decision": "retain_with_explicit_endpoint_and_identity",
        "baseline_assay_record": 1,
        "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.1 mM TCEP; 0.05% (w/v) Tween-20; 0.3% (v/v) DMSO",
        "ccd_id": "A1IEF",
        "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
        "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
        "chemical_identity_status": "exact_single_CCD_identity",
        "component_context": null,
        "compound_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
        "compound_name": "compound 7 (Collie 2025)",
        "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD2 208–368\", \"purified_tags\": \"N-terminal Avi; C-terminal 6His; biotinylated\", \"replicates\": \"at least 3\", \"uncertainty_type\": \"SD\"}",
        "crystallographic_component_ids": null,
        "curation_version": "frozen-v1.2",
        "domain": "PWWP1",
        "domain_id": "UP:O96028:PWWP1",
        "endpoint": "Kd",
        "endpoint_label_status": null,
        "evidence_class": "direct_binding_affinity",
        "evidence_location": "Table 1",
        "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC12434523/",
        "gene": "NSD2",
        "interpretation": "Affinity pertains to assay construct; crystal mutations and boundaries are separately recorded.",
        "is_measured": true,
        "is_negative": false,
        "method": "SPR",
        "molecular_entity_type": "small_molecule_preparation",
        "normalized_exact_uM": 0.15,
        "numeric_transcription_status": "matches_primary_report",
        "numeric_value_inferred_from_structure": 0,
        "organism": "Homo sapiens",
        "pH": 7.5,
        "pdb_id": "9FOE",
        "preparation_id": "PREP:COLLIE2025_7",
        "protein_id": "UP:O96028",
        "publication_year": 2025,
        "qualitative_result": null,
        "reference_id": "PMID:40959233",
        "remaining_uncertainty": "Assay-specific buffer and temperature verified from SI page 9; tag/construct from Table S2. Exact per-row kinetic-versus-steady-state fit choice and exact n beyond table footnote not specified. Chemical preparation identity remains as curated.",
        "replicates": "at least 3 independent replicates (Table 1 general SPR definition)",
        "role": "experimentally_studied_ligand",
        "source_component_url": null,
        "source_database": "Primary literature (frozen Atlas)",
        "source_id": "S05",
        "source_measurement_key": "aad07c81cb428bb6e480af2d79e30d7415101720070de31ebcc123870d7a89c7",
        "source_original": {
          "DMSO_percent": 0.3,
          "abstract_reported_endpoint": null,
          "abstract_reported_method": null,
          "abstract_reported_units": null,
          "abstract_reported_value": null,
          "assay_construct_end": 368,
          "assay_construct_start": 208,
          "assay_record_id": "PWWP:ASSAY:0017",
          "assay_type": "SPR Kd",
          "assay_value_transferred_to_modeled_stereoisomers": 0,
          "audit_decision": "retain_with_explicit_endpoint_and_identity",
          "baseline_assay_record": 1,
          "buffer": "10 mM HEPES; 150 mM NaCl; 3 mM EDTA; 0.1 mM TCEP; 0.05% (w/v) Tween-20; 0.3% (v/v) DMSO",
          "ccd_id": "A1IEF",
          "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
          "chemical_id": "INCHIKEY:HHACEXLLNHJLFT-INIZCTEOSA-N",
          "chemical_identity_status": "exact_single_CCD_identity",
          "component_context": null,
          "compound_name": "compound 7 (Collie 2025)",
          "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD2 208–368\", \"purified_tags\": \"N-terminal Avi; C-terminal 6His; biotinylated\", \"replicates\": \"at least 3\", \"uncertainty_type\": \"SD\"}",
          "crystallographic_component_ids": null,
          "domain": "PWWP1",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint_label_status": null,
          "evidence_class": "direct_binding_affinity",
          "evidence_location": "Table 1",
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      "search_text": "llc0424 inchikey:ohrabuzlzfhhej-uhfffaoysa-n llc0424 nsd2 {\"aliases\":[],\"bound_pose\":false,\"canonical_smiles\":\"c1cc1n(cc2=cc=c(c=c2)c(=o)nc3=cc=c(c=c3)c(=o)nc4ccn(cc4)c5=cc6=c(c=c5)c(=o)n(c6=o)c7ccc(=o)nc7=o)c(=o)c8=cc9=c(c=c8)nc(=o)co9\",\"ccd_ids\":[],\"chemical_id\":\"inchikey:ohrabuzlzfhhej-uhfffaoysa-n\",\"clinical_status\":\"not independently assessed\",\"curation_version\":\"phase5-1.0.0\",\"external_identifiers\":{\"pubchem cid\":\"171663346\"},\"identity_status\":\"resolved_reference_identity\",\"identity_verification\":\"pubchem reference identity for named compound10l; primary article confirms compound10l alias and chemical synthesis; unspecified stereochemistry retained\",\"inchi\":\"inchi=1s/c45h41n7o9/c53-38-16-15-36(42(57)49-38)52-44(59)33-13-12-32(22-34(33)45(52)60)50-19-17-30(18-20-50)47-41(56)27-5-8-29(9-6-27)46-40(55)26-3-1-25(2-4-26)23-51(31-10-11-31)43(58)28-7-14-35-37(21-28)61-24-39(54)48-35/h1-9,12-14,21-22,30-31,36h,10-11,15-20,23-24h2,(h,46,55)(h,47,56)(h,48,54)(h,49,53,57)\",\"inchikey\":\"ohrabuzlzfhhej-uhfffaoysa-n\",\"isomeric_smiles\":\"c1cc1n(cc2=cc=c(c=c2)c(=o)nc3=cc=c(c=c3)c(=o)nc4ccn(cc4)c5=cc6=c(c=c5)c(=o)n(c6=o)c7ccc(=o)nc7=o)c(=o)c8=cc9=c(c=c8)nc(=o)co9\",\"molecular_formula\":\"c45h41n7o9\",\"molecular_weight\":\"823.8\",\"name\":\"llc0424\",\"primary_name\":\"llc0424\",\"pubchem_cid\":\"171663346\",\"retrieval_date\":\"2026-10-26\",\"smiles\":\"c1cc1n(cc2=cc=c(c=c2)c(=o)nc3=cc=c(c=c3)c(=o)nc4ccn(cc4)c5=cc6=c(c=c5)c(=o)n(c6=o)c7ccc(=o)nc7=o)c(=o)c8=cc9=c(c=c8)nc(=o)co9\",\"source_url\":\"https://pubchem.ncbi.nlm.nih.gov/compound/171663346\",\"source_urls\":[\"https://pubchem.ncbi.nlm.nih.gov/compound/171663346\"],\"version\":\"phase5.chemical_curation.1.1.0\"} pmid:38687638 2024 https://pmc.ncbi.nlm.nih.gov/articles/pmc11094793/ pmid:38687638 2024 https://pmc.ncbi.nlm.nih.gov/articles/pmc11094793/",
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        "curation_version": "frozen-v1.2",
        "external_identifiers": {},
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        "formulae": "[\"C16 H14 N2 O S\"]",
        "geometry_note": "CCD ideal SDF is a reference chemical geometry, not a deposited bound pose.",
        "identity_status": "complete_deposited_InChIKey",
        "inchikey": "WYAGGMZTARRIDX-UHFFFAOYSA-N",
        "inventory_origin": "v1_CCD_inventory",
        "isomeric_smiles": "c1cc(sc1)CN(C2CC2)C(=O)c3ccc(cc3)C#N",
        "primary_name": "4-cyano-N-cyclopropyl-N-[(thiophen-2-yl)methyl]benzamide",
        "retrieval_date": "2026-10-24",
        "smiles_stereo_by_ccd": "{\"Q5D\": \"c1cc(sc1)CN(C2CC2)C(=O)c3ccc(cc3)C#N\"}",
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          "https://www.rcsb.org/ligand/Q5D"
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      "identity_note": "Complete deposited identity retained; no connectivity-only or name-only merge.",
      "identity_resolved": true,
      "is_control": false,
      "is_probe": false,
      "measured_observation_count": 2,
      "name": "MR837 (3f)",
      "negative_count": 0,
      "observation_ids": [
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      "pdb_structure_count": 1,
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      "preparation_ids": [
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      "protein_ids": [
        "UP:O96028"
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      "relationships": [],
      "relevant": true,
      "search_text": "mr837 (3f) inchikey:wyaggmztarridx-uhfffaoysa-n 4-cyano-n-cyclopropyl-n-[(thiophen-2-yl)methyl]benzamide mr837 (3f) nsd2 up:o96028:pwwp1 6ue6 {\"aliases\":[\"4-cyano-n-cyclopropyl-n-[(thiophen-2-yl)methyl]benzamide\"],\"ccd_ids\":[\"q5d\"],\"ccd_names\":\"[\\\"4-cyano-n-cyclopropyl-n-[(thiophen-2-yl)methyl]benzamide\\\"]\",\"ccd_types\":\"[\\\"non-polymer\\\"]\",\"chemical_id\":\"inchikey:wyaggmztarridx-uhfffaoysa-n\",\"connectivity_block\":\"wyaggmztarridx\",\"curated_source_sha256\":null,\"curation_version\":\"frozen-v1.2\",\"external_identifiers\":{},\"formal_charge_by_ccd\":\"{\\\"q5d\\\": 0}\",\"formulae\":\"[\\\"c16 h14 n2 o s\\\"]\",\"geometry_note\":\"ccd ideal sdf is a reference chemical geometry, not a deposited bound pose.\",\"identity_status\":\"complete_deposited_inchikey\",\"inchikey\":\"wyaggmztarridx-uhfffaoysa-n\",\"inventory_origin\":\"v1_ccd_inventory\",\"isomeric_smiles\":\"c1cc(sc1)cn(c2cc2)c(=o)c3ccc(cc3)c#n\",\"primary_name\":\"4-cyano-n-cyclopropyl-n-[(thiophen-2-yl)methyl]benzamide\",\"retrieval_date\":\"2026-10-24\",\"smiles_stereo_by_ccd\":\"{\\\"q5d\\\": \\\"c1cc(sc1)cn(c2cc2)c(=o)c3ccc(cc3)c#n\\\"}\",\"source_metadata_sha256\":\"{\\\"q5d\\\": \\\"cd79b90f28f534ca0857c5ed8c356a210b6f4b6820c4df810482c24f0db6f57e\\\"}\",\"source_urls\":[\"https://www.rcsb.org/ligand/q5d\"]} pmid:33522809 2021 https://pmc.ncbi.nlm.nih.gov/articles/pmc8130708/ pmid:33522809 2021 https://pmc.ncbi.nlm.nih.gov/articles/pmc8130708/",
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        "https://www.rcsb.org/ligand/Q5D"
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      "verification_pending": false,
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            "alternate_locations": "[]",
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          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
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          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
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            "ccd_id": "Q5D",
            "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
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            "ideal_CCD_SDF_is_source_pose": 0,
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            "label_seq_id": null,
            "ligand_instance_id": "PDB:6UE6:LIG:KA:Q5D:2001:.",
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            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
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          "minimum_chain_distance_angstrom": 3.0472,
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          "protein_id": "UP:O96028",
          "protein_label_asym_id": "D",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
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          "ccd_id": "Q5D",
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          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
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          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"H\"]",
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            "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
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            "covalent_connection_ids": "[]",
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            "ideal_CCD_SDF_is_source_pose": 0,
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            "label_seq_id": null,
            "ligand_instance_id": "PDB:6UE6:LIG:LB:Q5D:2001:.",
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            "nearest_polypeptide_label_asym_id": "H",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/6UE6/original.cif",
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          "ligand_instance_id": "PDB:6UE6:LIG:LB:Q5D:2001:.",
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          "minimum_Pfam_distance_angstrom": 3.5141,
          "minimum_chain_distance_angstrom": 3.5141,
          "minimum_core_distance_angstrom": 3.8076,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "E",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:6UE6:LIG:LB:Q5D:2001:.:SITE:UP:O96028:PWWP1:E",
          "source_coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27"
        },
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          "biochemical_activity_inferred": 0,
          "ccd_id": "Q5D",
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          "chain_id": "PDB:6UE6:CHAIN:H:UP:O96028",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "contact_distance_rank": 1,
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          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"H\"]",
            "auth_seq_id": "2001",
            "ccd_id": "Q5D",
            "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"E\", \"sequence_length\": 141, \"uniprot_ids\": [\"O96028\"]}, {\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"H\", \"sequence_length\": 141, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 20,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "LB",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:6UE6:LIG:LB:Q5D:2001:.",
            "nearest_polypeptide_distance_angstrom": 3.0433,
            "nearest_polypeptide_label_asym_id": "H",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "6UE6",
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/6UE6/original.cif",
            "source_coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
            "unique_heavy_atom_names": 20
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          "ligand_instance_id": "PDB:6UE6:LIG:LB:Q5D:2001:.",
          "ligand_label_asym_id": "LB",
          "minimum_Pfam_distance_angstrom": 3.0433,
          "minimum_chain_distance_angstrom": 3.0433,
          "minimum_core_distance_angstrom": 3.0433,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "H",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:6UE6:LIG:LB:Q5D:2001:.:SITE:UP:O96028:PWWP1:H",
          "source_coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27"
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          "instance": {
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          "role": "experimentally studied ligand",
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          "instance": {
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            "occupancy_min": 1.0,
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            "occupancy_max": 1.0,
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            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"G\", \"sequence_length\": 141, \"uniprot_ids\": [\"O96028\"]}, {\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"H\", \"sequence_length\": 141, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 20,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "ZA",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:6UE6:LIG:ZA:Q5D:2001:.",
            "nearest_polypeptide_distance_angstrom": 3.0377,
            "nearest_polypeptide_label_asym_id": "G",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "6UE6",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"G\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 21, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.8886, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 24, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.3187, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 27, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.5006, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 57, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.5567, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 58, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.8894, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 59, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.3608, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 60, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.4841, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 61, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.0377, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"271\", \"component\": \"PRO\", \"entity_position\": 62, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 4.3328, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 63, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.4051, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 64, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.5948, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 65, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.8665, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"318\", \"component\": \"LEU\", \"entity_position\": 109, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 4.1319, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 112, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.4846, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 60, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.909, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"316\", \"component\": \"GLY\", \"entity_position\": 107, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 4.864, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"317\", \"component\": \"LYS\", \"entity_position\": 108, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.8308, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 111, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.5373, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 112, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 4.2923, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/6UE6/original.cif",
            "source_coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
            "unique_heavy_atom_names": 20
          },
          "ligand_instance_id": "PDB:6UE6:LIG:ZA:Q5D:2001:.",
          "ligand_label_asym_id": "ZA",
          "minimum_Pfam_distance_angstrom": 3.5373,
          "minimum_chain_distance_angstrom": 3.5373,
          "minimum_core_distance_angstrom": 3.909,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "H",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:6UE6:LIG:ZA:Q5D:2001:.:SITE:UP:O96028:PWWP1:H",
          "source_coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27"
        }
      ],
      "context_assay_count": 2,
      "context_measured_count": 2,
      "context_bound_count": 1,
      "context_pdb_count": 1,
      "context_negative_count": 0,
      "context_is_probe": false,
      "context_bioactivity_only": false,
      "context_kind": "Measured + bound structure",
      "science": {
        "studied_compound": true,
        "measured_count": 2,
        "structural_research_ligand": true,
        "research_pdb_count": 1,
        "other_component": false,
        "component_site_count": 0,
        "verification_queue": false,
        "positive_direct_binder": true,
        "reported_probe": false,
        "reported_control": false,
        "cellular_activity": false,
        "protein_degradation": false,
        "bioactivity_only": false,
        "research_site_count": 16,
        "unknown_site_count": 0,
        "annotation_roles": [
          "studied",
          "structural"
        ]
      },
      "science_label": "Studied + deposited research ligand",
      "science_profile": {
        "annotation_roles": [
          "studied",
          "structural"
        ],
        "cellular_activity": false,
        "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
        "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
        "entity_kind": "chemical_identity",
        "identity_resolved": true,
        "measured_observation_count": 2,
        "name": "MR837 (3f)",
        "other_pdb_component": false,
        "other_site_count": 0,
        "positive_direct_binder": true,
        "primary_view": "studied",
        "protein_degradation": false,
        "reported_control": false,
        "reported_probe": false,
        "rule": "Independent source observations + per-site coordinate role, not universal pharmacology",
        "source_observation_ids": [
          "PWWP:ASSAY:0002",
          "PWWP:ASSAY:0001"
        ],
        "source_site_ids": [
          "PDB:6UE6:LIG:I:Q5D:2001:.:SITE:UP:O96028:PWWP1:A",
          "PDB:6UE6:LIG:KA:Q5D:2001:.:SITE:UP:O96028:PWWP1:A",
          "PDB:6UE6:LIG:S:Q5D:2001:.:SITE:UP:O96028:PWWP1:B",
          "PDB:6UE6:LIG:I:Q5D:2001:.:SITE:UP:O96028:PWWP1:B",
          "PDB:6UE6:LIG:EA:Q5D:2001:.:SITE:UP:O96028:PWWP1:C",
          "PDB:6UE6:LIG:S:Q5D:2001:.:SITE:UP:O96028:PWWP1:C",
          "PDB:6UE6:LIG:KA:Q5D:2001:.:SITE:UP:O96028:PWWP1:D",
          "PDB:6UE6:LIG:EA:Q5D:2001:.:SITE:UP:O96028:PWWP1:D",
          "PDB:6UE6:LIG:OA:Q5D:2001:.:SITE:UP:O96028:PWWP1:E",
          "PDB:6UE6:LIG:LB:Q5D:2001:.:SITE:UP:O96028:PWWP1:E",
          "PDB:6UE6:LIG:UA:Q5D:2001:.:SITE:UP:O96028:PWWP1:F",
          "PDB:6UE6:LIG:OA:Q5D:2001:.:SITE:UP:O96028:PWWP1:F",
          "PDB:6UE6:LIG:ZA:Q5D:2001:.:SITE:UP:O96028:PWWP1:G",
          "PDB:6UE6:LIG:UA:Q5D:2001:.:SITE:UP:O96028:PWWP1:G",
          "PDB:6UE6:LIG:LB:Q5D:2001:.:SITE:UP:O96028:PWWP1:H",
          "PDB:6UE6:LIG:ZA:Q5D:2001:.:SITE:UP:O96028:PWWP1:H"
        ],
        "structural_research_ligand": true,
        "structural_research_site_count": 16,
        "studied_compound": true,
        "total_observation_count": 2,
        "uncertain_site_count": 0,
        "uncertainty": "Classification is evidence- and experiment-scoped; missing assays do not prove nonbinding.",
        "verification_queue": false,
        "verification_status": "source_scoped_mixed"
      },
      "science_site_roles": {
        "PDB:6UE6:LIG:EA:Q5D:2001:.:SITE:UP:O96028:PWWP1:C": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:EA:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:EA:Q5D:2001:.:SITE:UP:O96028:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6UE6:LIG:EA:Q5D:2001:.:SITE:UP:O96028:PWWP1:D": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:EA:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:EA:Q5D:2001:.:SITE:UP:O96028:PWWP1:D",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6UE6:LIG:I:Q5D:2001:.:SITE:UP:O96028:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:I:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:I:Q5D:2001:.:SITE:UP:O96028:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6UE6:LIG:I:Q5D:2001:.:SITE:UP:O96028:PWWP1:B": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:I:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:I:Q5D:2001:.:SITE:UP:O96028:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6UE6:LIG:KA:Q5D:2001:.:SITE:UP:O96028:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:KA:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:KA:Q5D:2001:.:SITE:UP:O96028:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6UE6:LIG:KA:Q5D:2001:.:SITE:UP:O96028:PWWP1:D": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:KA:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:KA:Q5D:2001:.:SITE:UP:O96028:PWWP1:D",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6UE6:LIG:LB:Q5D:2001:.:SITE:UP:O96028:PWWP1:E": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:LB:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:LB:Q5D:2001:.:SITE:UP:O96028:PWWP1:E",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6UE6:LIG:LB:Q5D:2001:.:SITE:UP:O96028:PWWP1:H": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:LB:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:LB:Q5D:2001:.:SITE:UP:O96028:PWWP1:H",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:6UE6:LIG:OA:Q5D:2001:.:SITE:UP:O96028:PWWP1:E": {
          "ccd_url": "https://www.rcsb.org/ligand/Q5D",
          "chemical_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:WYAGGMZTARRIDX-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fbf22f430937d8ed0ad110294f251af23fd33f7e8bf3164fe0dc9e3cb4f21d27",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:6UE6:LIG:OA:Q5D:2001:.",
          "observed_other_component": false,
          "pdb_id": "6UE6",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:6UE6:LIG:OA:Q5D:2001:.:SITE:UP:O96028:PWWP1:E",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/6UE6",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
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        },
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            "source_reported_value": "7",
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        "MRT866",
        "~{N}-cyclopropyl-3-oxidanylidene-~{N}-(thiophen-2-ylmethyl)-4~{H}-1,4-benzoxazine-7-carboxamide"
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        "7MDN"
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      "classifications": [],
      "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
      "curation_version": "phase5-1.0.0",
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        "calculated_HBD": 1,
        "calculated_TPSA": 58.64,
        "calculated_formula": "C17H16N2O3S",
        "calculated_logP": 2.8838,
        "calculated_molecular_weight": 328.393,
        "computed_inchikey": "XPHOPAPMJBSLFN-UHFFFAOYSA-N",
        "descriptor_scope": "RDKit calculation for the source identity; not an experimental measurement",
        "files": {
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        "rdkit_version": "2025.09.3",
        "status": "verified_smiles_full_inchikey_match"
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      "development_status": "Not independently curated",
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      "entity_kind": "chemical_identity",
      "genes": [
        "NSD2"
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      "has_bioactivity_only": false,
      "has_source_conflict": false,
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        "ccd_ids": [
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        "ccd_names": "[\"~{N}-cyclopropyl-3-oxidanylidene-~{N}-(thiophen-2-ylmethyl)-4~{H}-1,4-benzoxazine-7-carboxamide\"]",
        "ccd_types": "[\"non-polymer\"]",
        "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
        "connectivity_block": "XPHOPAPMJBSLFN",
        "curated_source_sha256": null,
        "curation_version": "frozen-v1.2",
        "external_identifiers": {},
        "formal_charge_by_ccd": "{\"Y6V\": 0}",
        "formulae": "[\"C17 H16 N2 O3 S\"]",
        "geometry_note": "CCD ideal SDF is a reference chemical geometry, not a deposited bound pose.",
        "identity_status": "complete_deposited_InChIKey",
        "inchikey": "XPHOPAPMJBSLFN-UHFFFAOYSA-N",
        "inventory_origin": "v1_CCD_inventory",
        "isomeric_smiles": "c1cc(sc1)CN(C2CC2)C(=O)c3ccc4c(c3)OCC(=O)N4",
        "primary_name": "~{N}-cyclopropyl-3-oxidanylidene-~{N}-(thiophen-2-ylmethyl)-4~{H}-1,4-benzoxazine-7-carboxamide",
        "retrieval_date": "2026-10-24",
        "smiles_stereo_by_ccd": "{\"Y6V\": \"c1cc(sc1)CN(C2CC2)C(=O)c3ccc4c(c3)OCC(=O)N4\"}",
        "source_metadata_sha256": "{\"Y6V\": \"2c8c70a80727afc9def58f2457cc063473f3c173b932c7f3f315681b62fe8a5e\"}",
        "source_urls": [
          "https://www.rcsb.org/ligand/Y6V"
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      "identity_note": "Complete deposited identity retained; no connectivity-only or name-only merge.",
      "identity_resolved": true,
      "is_control": false,
      "is_probe": false,
      "measured_observation_count": 1,
      "name": "MRT866",
      "negative_count": 0,
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      "pdb_structure_count": 2,
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        "PREP:MRT866"
      ],
      "protein_ids": [
        "UP:O96028"
      ],
      "relationships": [],
      "relevant": true,
      "search_text": "mrt866 inchikey:xphopapmjbslfn-uhfffaoysa-n mrt866 ~{n}-cyclopropyl-3-oxidanylidene-~{n}-(thiophen-2-ylmethyl)-4~{h}-1,4-benzoxazine-7-carboxamide nsd2 up:o96028:pwwp1 7lmt 7mdn {\"aliases\":[\"~{n}-cyclopropyl-3-oxidanylidene-~{n}-(thiophen-2-ylmethyl)-4~{h}-1,4-benzoxazine-7-carboxamide\"],\"ccd_ids\":[\"y6v\"],\"ccd_names\":\"[\\\"~{n}-cyclopropyl-3-oxidanylidene-~{n}-(thiophen-2-ylmethyl)-4~{h}-1,4-benzoxazine-7-carboxamide\\\"]\",\"ccd_types\":\"[\\\"non-polymer\\\"]\",\"chemical_id\":\"inchikey:xphopapmjbslfn-uhfffaoysa-n\",\"connectivity_block\":\"xphopapmjbslfn\",\"curated_source_sha256\":null,\"curation_version\":\"frozen-v1.2\",\"external_identifiers\":{},\"formal_charge_by_ccd\":\"{\\\"y6v\\\": 0}\",\"formulae\":\"[\\\"c17 h16 n2 o3 s\\\"]\",\"geometry_note\":\"ccd ideal sdf is a reference chemical geometry, not a deposited bound pose.\",\"identity_status\":\"complete_deposited_inchikey\",\"inchikey\":\"xphopapmjbslfn-uhfffaoysa-n\",\"inventory_origin\":\"v1_ccd_inventory\",\"isomeric_smiles\":\"c1cc(sc1)cn(c2cc2)c(=o)c3ccc4c(c3)occ(=o)n4\",\"primary_name\":\"~{n}-cyclopropyl-3-oxidanylidene-~{n}-(thiophen-2-ylmethyl)-4~{h}-1,4-benzoxazine-7-carboxamide\",\"retrieval_date\":\"2026-10-24\",\"smiles_stereo_by_ccd\":\"{\\\"y6v\\\": \\\"c1cc(sc1)cn(c2cc2)c(=o)c3ccc4c(c3)occ(=o)n4\\\"}\",\"source_metadata_sha256\":\"{\\\"y6v\\\": \\\"2c8c70a80727afc9def58f2457cc063473f3c173b932c7f3f315681b62fe8a5e\\\"}\",\"source_urls\":[\"https://www.rcsb.org/ligand/y6v\"]} pmid:34782742 2022 https://pmc.ncbi.nlm.nih.gov/articles/pmc9189931/",
      "source_urls": [
        "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
        "https://www.rcsb.org/ligand/Y6V"
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      "context_structures": [
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          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
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          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7LMT/original.cif",
            "source_coordinate_sha256": "fb452dcc9ac176dd436a568f45cd7c3bec865b2422bfae1f7d54a214d9cff6c0",
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          "minimum_chain_distance_angstrom": 2.9635,
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          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "B",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7LMT:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "source_coordinate_sha256": "fb452dcc9ac176dd436a568f45cd7c3bec865b2422bfae1f7d54a214d9cff6c0"
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          "biochemical_activity_inferred": 0,
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          "chain_id": "PDB:7LMT:CHAIN:C:UP:O96028",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "core_contacts_5A": "[{\"auth_asym_id\": \"C\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"C\", \"minimum_distance_angstrom\": 3.939, \"uniprot_position\": 269}]",
          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"B\"]",
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            "ccd_id": "Y6V",
            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"B\", \"sequence_length\": 140, \"uniprot_ids\": [\"O96028\"]}, {\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"C\", \"sequence_length\": 140, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 23,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "K",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:7LMT:LIG:K:Y6V:401:.",
            "nearest_polypeptide_distance_angstrom": 2.9635,
            "nearest_polypeptide_label_asym_id": "B",
            "occupancy_max": 1.0,
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            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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            "pose_kind": "deposited_source_coordinates",
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            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7LMT/original.cif",
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          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
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          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
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          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
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          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
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            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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            "ligand_instance_id": "PDB:7LMT:LIG:N:Y6V:401:.",
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            "pose_kind": "deposited_source_coordinates",
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          "pdb_id": "7LMT",
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          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7LMT:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
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          "chain_id": "PDB:7LMT:CHAIN:E:UP:O96028",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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          "cutoff_angstrom": 5.0,
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          "exact_pwwp_contact": true,
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            "alternate_locations": "[]",
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            "occupancy_min": 1.0,
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7LMT/original.cif",
            "source_coordinate_sha256": "fb452dcc9ac176dd436a568f45cd7c3bec865b2422bfae1f7d54a214d9cff6c0",
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          "minimum_chain_distance_angstrom": 2.9609,
          "minimum_core_distance_angstrom": 2.9609,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "G",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7LMT:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "source_coordinate_sha256": "fb452dcc9ac176dd436a568f45cd7c3bec865b2422bfae1f7d54a214d9cff6c0"
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          "biochemical_activity_inferred": 0,
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          "chain_id": "PDB:7LMT:CHAIN:G:UP:O96028",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "contact_distance_rank": 2,
          "core_contacts_5A": "[{\"auth_asym_id\": \"G\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.9131, \"uniprot_position\": 269}]",
          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"H\"]",
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            "ccd_id": "Y6V",
            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"G\", \"sequence_length\": 140, \"uniprot_ids\": [\"O96028\"]}, {\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"H\", \"sequence_length\": 140, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 23,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "R",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:7LMT:LIG:R:Y6V:401:.",
            "nearest_polypeptide_distance_angstrom": 2.9704,
            "nearest_polypeptide_label_asym_id": "H",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "7LMT",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"G\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.9131, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"316\", \"component\": \"GLY\", \"entity_position\": 106, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 4.975, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"317\", \"component\": \"LYS\", \"entity_position\": 107, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.8079, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 110, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.536, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 111, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 4.3451, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 20, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.7176, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 23, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.2198, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"234\", \"component\": \"PRO\", \"entity_position\": 24, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 4.8696, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 26, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.5529, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 56, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.335, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 57, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.304, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 58, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.1903, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.3614, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 60, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 2.9704, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"271\", \"component\": \"PRO\", \"entity_position\": 61, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 4.0874, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 62, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.4663, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 63, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.6236, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 64, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.6508, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 111, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.0052, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7LMT/original.cif",
            "source_coordinate_sha256": "fb452dcc9ac176dd436a568f45cd7c3bec865b2422bfae1f7d54a214d9cff6c0",
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          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
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            "ccd_id": "Y6V",
            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
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            "ligand_instance_id": "PDB:7LMT:LIG:R:Y6V:401:.",
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            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7LMT/original.cif",
            "source_coordinate_sha256": "fb452dcc9ac176dd436a568f45cd7c3bec865b2422bfae1f7d54a214d9cff6c0",
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          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
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          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
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          "chain_id": "PDB:7MDN:CHAIN:A:UP:O96028",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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          "protein_id": "UP:O96028",
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          "role": "experimentally studied ligand",
          "role_category": "functional",
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            "alternate_locations": "[]",
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          "minimum_Pfam_distance_angstrom": 3.5194,
          "minimum_chain_distance_angstrom": 3.5194,
          "minimum_core_distance_angstrom": 3.8394,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "H",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
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          "protein_id": "UP:O96028",
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          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
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          "gene": "NSD2",
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          "instance": {
            "alternate_locations": "[]",
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            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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            "occupancy_min": 1.0,
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
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            "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
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          "ligand_instance_id": "PDB:7MDN:LIG:K:Y6V:401:.",
          "ligand_label_asym_id": "K",
          "minimum_Pfam_distance_angstrom": 3.4641,
          "minimum_chain_distance_angstrom": 3.4641,
          "minimum_core_distance_angstrom": 3.9046,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "C",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a"
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            "occupancy_min": 1.0,
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7MDN/original.cif",
            "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
            "unique_heavy_atom_names": 23
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          "ligand_instance_id": "PDB:7MDN:LIG:M:Y6V:401:.",
          "ligand_label_asym_id": "M",
          "minimum_Pfam_distance_angstrom": 3.5464,
          "minimum_chain_distance_angstrom": 3.5464,
          "minimum_core_distance_angstrom": 3.8855,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "E",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a"
        },
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          "biochemical_activity_inferred": 0,
          "ccd_id": "Y6V",
          "chain_contacts_5A": "[{\"auth_asym_id\": \"B\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.8567, \"uniprot_position\": 269}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"316\", \"component\": \"GLY\", \"entity_position\": 106, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.9443, \"uniprot_position\": 316}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"317\", \"component\": \"LYS\", \"entity_position\": 107, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.7256, \"uniprot_position\": 317}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 110, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.4955, \"uniprot_position\": 320}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 111, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.3609, \"uniprot_position\": 321}]",
          "chain_id": "PDB:7MDN:CHAIN:B:UP:O96028",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "contact_distance_rank": 2,
          "core_contacts_5A": "[{\"auth_asym_id\": \"B\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.8567, \"uniprot_position\": 269}]",
          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"E\"]",
            "auth_seq_id": "401",
            "ccd_id": "Y6V",
            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"B\", \"sequence_length\": 140, \"uniprot_ids\": [\"O96028\"]}, {\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"E\", \"sequence_length\": 140, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 23,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "N",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:7MDN:LIG:N:Y6V:401:.",
            "nearest_polypeptide_distance_angstrom": 2.9125,
            "nearest_polypeptide_label_asym_id": "E",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "7MDN",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"B\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.8567, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"316\", \"component\": \"GLY\", \"entity_position\": 106, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.9443, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"317\", \"component\": \"LYS\", \"entity_position\": 107, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.7256, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 110, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.4955, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 111, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.3609, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 20, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.6467, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 23, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.1881, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"234\", \"component\": \"PRO\", \"entity_position\": 24, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 4.8902, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 26, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.5898, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 56, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.3232, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 57, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.3185, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 58, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.2011, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.3283, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 60, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 2.9125, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"271\", \"component\": \"PRO\", \"entity_position\": 61, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 4.182, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 62, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.4871, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 63, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.6056, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 64, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.6529, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"318\", \"component\": \"LEU\", \"entity_position\": 108, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.8128, \"uniprot_position\": null}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 111, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 2.9491, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7MDN/original.cif",
            "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
            "unique_heavy_atom_names": 23
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          "ligand_instance_id": "PDB:7MDN:LIG:N:Y6V:401:.",
          "ligand_label_asym_id": "N",
          "minimum_Pfam_distance_angstrom": 3.4955,
          "minimum_chain_distance_angstrom": 3.4955,
          "minimum_core_distance_angstrom": 3.8567,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "B",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a"
        },
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          "biochemical_activity_inferred": 0,
          "ccd_id": "Y6V",
          "chain_contacts_5A": "[{\"auth_asym_id\": \"E\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 20, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.6467, \"uniprot_position\": 230}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 23, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.1881, \"uniprot_position\": 233}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"234\", \"component\": \"PRO\", \"entity_position\": 24, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 4.8902, \"uniprot_position\": 234}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 26, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.5898, \"uniprot_position\": 236}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 56, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.3232, \"uniprot_position\": 266}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 57, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.3185, \"uniprot_position\": 267}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 58, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.2011, \"uniprot_position\": 268}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.3283, \"uniprot_position\": 269}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 60, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 2.9125, \"uniprot_position\": 270}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"271\", \"component\": \"PRO\", \"entity_position\": 61, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 4.182, \"uniprot_position\": 271}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 62, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.4871, \"uniprot_position\": 272}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 63, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.6056, \"uniprot_position\": 273}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 64, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.6529, \"uniprot_position\": 274}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"318\", \"component\": \"LEU\", \"entity_position\": 108, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 3.8128, \"uniprot_position\": 318}, {\"auth_asym_id\": \"E\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 111, \"label_asym_id\": \"E\", \"minimum_distance_angstrom\": 2.9491, \"uniprot_position\": 321}]",
          "chain_id": "PDB:7MDN:CHAIN:E:UP:O96028",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "minimum_chain_distance_angstrom": 2.9125,
          "minimum_core_distance_angstrom": 2.9125,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
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          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
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          "cutoff_angstrom": 5.0,
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          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
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            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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            "occupancy_min": 1.0,
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
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          "ligand_instance_id": "PDB:7MDN:LIG:P:Y6V:401:.",
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          "minimum_Pfam_distance_angstrom": 3.4898,
          "minimum_chain_distance_angstrom": 3.4898,
          "minimum_core_distance_angstrom": 3.951,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "A",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7MDN/original.cif",
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          "minimum_Pfam_distance_angstrom": 3.4941,
          "minimum_chain_distance_angstrom": 3.4941,
          "minimum_core_distance_angstrom": 3.8794,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "F",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a"
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          "minimum_chain_distance_angstrom": 2.9056,
          "minimum_core_distance_angstrom": 2.9056,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "G",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
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          "covalent_connection_ids": "[]",
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          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
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            "ccd_id": "Y6V",
            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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            "ideal_CCD_SDF_is_source_pose": 0,
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            "ligand_instance_id": "PDB:7MDN:LIG:R:Y6V:401:.",
            "nearest_polypeptide_distance_angstrom": 2.8979,
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            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "7MDN",
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            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7MDN/original.cif",
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          "ligand_instance_id": "PDB:7MDN:LIG:R:Y6V:401:.",
          "ligand_label_asym_id": "R",
          "minimum_Pfam_distance_angstrom": 3.5515,
          "minimum_chain_distance_angstrom": 3.5515,
          "minimum_core_distance_angstrom": 3.9208,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "G",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a"
        },
        {
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          "biochemical_activity_inferred": 0,
          "ccd_id": "Y6V",
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          "chain_id": "PDB:7MDN:CHAIN:H:UP:O96028",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "contact_distance_rank": 1,
          "core_contacts_5A": "[{\"auth_asym_id\": \"H\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 20, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.6907, \"uniprot_position\": 230}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 23, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.1901, \"uniprot_position\": 233}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"234\", \"component\": \"PRO\", \"entity_position\": 24, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 4.9109, \"uniprot_position\": 234}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 26, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.5967, \"uniprot_position\": 236}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 56, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.34, \"uniprot_position\": 266}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 57, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.3456, \"uniprot_position\": 267}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 58, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.1836, \"uniprot_position\": 268}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.3309, \"uniprot_position\": 269}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 60, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 2.8979, \"uniprot_position\": 270}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"271\", \"component\": \"PRO\", \"entity_position\": 61, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 4.171, \"uniprot_position\": 271}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 62, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.4866, \"uniprot_position\": 272}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 63, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.5921, \"uniprot_position\": 273}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 64, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.6634, \"uniprot_position\": 274}]",
          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "NSD2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"H\"]",
            "auth_seq_id": "401",
            "ccd_id": "Y6V",
            "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"G\", \"sequence_length\": 140, \"uniprot_ids\": [\"O96028\"]}, {\"description\": \"Histone-lysine N-methyltransferase NSD2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"H\", \"sequence_length\": 140, \"uniprot_ids\": [\"O96028\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 23,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "R",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:7MDN:LIG:R:Y6V:401:.",
            "nearest_polypeptide_distance_angstrom": 2.8979,
            "nearest_polypeptide_label_asym_id": "H",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "7MDN",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"G\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.9208, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"316\", \"component\": \"GLY\", \"entity_position\": 106, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 4.9226, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"317\", \"component\": \"LYS\", \"entity_position\": 107, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.7955, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"320\", \"component\": \"ALA\", \"entity_position\": 110, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 3.5515, \"uniprot_position\": null}, {\"auth_asym_id\": \"G\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 111, \"label_asym_id\": \"G\", \"minimum_distance_angstrom\": 4.3775, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"230\", \"component\": \"VAL\", \"entity_position\": 20, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.6907, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 23, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.1901, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"234\", \"component\": \"PRO\", \"entity_position\": 24, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 4.9109, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 26, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.5967, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 56, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.34, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 57, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.3456, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 58, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.1836, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 59, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.3309, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 60, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 2.8979, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"271\", \"component\": \"PRO\", \"entity_position\": 61, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 4.171, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 62, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.4866, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 63, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.5921, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 64, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 3.6634, \"uniprot_position\": null}, {\"auth_asym_id\": \"H\", \"auth_seq_id\": \"321\", \"component\": \"GLN\", \"entity_position\": 111, \"label_asym_id\": \"H\", \"minimum_distance_angstrom\": 2.9632, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/NSD2__HUMAN__O96028/Co-Crystals/7MDN/original.cif",
            "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
            "unique_heavy_atom_names": 23
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          "ligand_instance_id": "PDB:7MDN:LIG:R:Y6V:401:.",
          "ligand_label_asym_id": "R",
          "minimum_Pfam_distance_angstrom": 2.8979,
          "minimum_chain_distance_angstrom": 2.8979,
          "minimum_core_distance_angstrom": 2.8979,
          "multiple_contacting_mapped_chains": 1,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "protein_label_asym_id": "H",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:7MDN:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
          "source_coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a"
        }
      ],
      "context_assay_count": 1,
      "context_measured_count": 1,
      "context_bound_count": 2,
      "context_pdb_count": 2,
      "context_negative_count": 0,
      "context_is_probe": false,
      "context_bioactivity_only": false,
      "context_kind": "Measured + bound structure",
      "science": {
        "studied_compound": true,
        "measured_count": 1,
        "structural_research_ligand": true,
        "research_pdb_count": 2,
        "other_component": false,
        "component_site_count": 0,
        "verification_queue": false,
        "positive_direct_binder": true,
        "reported_probe": false,
        "reported_control": false,
        "cellular_activity": false,
        "protein_degradation": false,
        "bioactivity_only": false,
        "research_site_count": 32,
        "unknown_site_count": 0,
        "annotation_roles": [
          "studied",
          "structural"
        ]
      },
      "science_label": "Studied + deposited research ligand",
      "science_profile": {
        "annotation_roles": [
          "studied",
          "structural"
        ],
        "cellular_activity": false,
        "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
        "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
        "entity_kind": "chemical_identity",
        "identity_resolved": true,
        "measured_observation_count": 1,
        "name": "MRT866",
        "other_pdb_component": false,
        "other_site_count": 0,
        "positive_direct_binder": true,
        "primary_view": "studied",
        "protein_degradation": false,
        "reported_control": false,
        "reported_probe": false,
        "rule": "Independent source observations + per-site coordinate role, not universal pharmacology",
        "source_observation_ids": [
          "PWWP:ASSAY:0003"
        ],
        "source_site_ids": [
          "PDB:7MDN:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
          "PDB:7LMT:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
          "PDB:7LMT:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
          "PDB:7MDN:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
          "PDB:7MDN:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "PDB:7LMT:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "PDB:7MDN:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "PDB:7LMT:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "PDB:7MDN:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "PDB:7LMT:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "PDB:7MDN:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "PDB:7LMT:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "PDB:7MDN:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:D",
          "PDB:7LMT:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:D",
          "PDB:7MDN:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:D",
          "PDB:7LMT:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:D",
          "PDB:7MDN:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "PDB:7LMT:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "PDB:7MDN:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "PDB:7LMT:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "PDB:7MDN:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "PDB:7LMT:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "PDB:7MDN:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "PDB:7LMT:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "PDB:7MDN:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "PDB:7LMT:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "PDB:7LMT:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "PDB:7MDN:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "PDB:7MDN:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
          "PDB:7LMT:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
          "PDB:7MDN:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
          "PDB:7LMT:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:H"
        ],
        "structural_research_ligand": true,
        "structural_research_site_count": 32,
        "studied_compound": true,
        "total_observation_count": 1,
        "uncertain_site_count": 0,
        "uncertainty": "Classification is evidence- and experiment-scoped; missing assays do not prove nonbinding.",
        "verification_queue": false,
        "verification_status": "source_scoped_mixed"
      },
      "science_site_roles": {
        "PDB:7LMT:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "fb452dcc9ac176dd436a568f45cd7c3bec865b2422bfae1f7d54a214d9cff6c0",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7LMT:LIG:I:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:H": {
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          "ligand_instance_id": "PDB:7LMT:LIG:I:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
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          "role_group": "research_ligand",
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          "site_id": "PDB:7LMT:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:B": {
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          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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          "ligand_instance_id": "PDB:7LMT:LIG:K:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
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          "site_id": "PDB:7LMT:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:C": {
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          "ligand_instance_id": "PDB:7LMT:LIG:K:Y6V:401:.",
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          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
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          "role_group": "research_ligand",
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          "site_id": "PDB:7LMT:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:C": {
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          "ligand_instance_id": "PDB:7LMT:LIG:L:Y6V:401:.",
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          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
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          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:D": {
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          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7LMT:LIG:L:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:D",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:D": {
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          "ligand_instance_id": "PDB:7LMT:LIG:M:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:D",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:E": {
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          "ligand_instance_id": "PDB:7LMT:LIG:M:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:B": {
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          "ligand_instance_id": "PDB:7LMT:LIG:N:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
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          "site_id": "PDB:7LMT:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:E": {
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          "ligand_instance_id": "PDB:7LMT:LIG:N:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
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          "ligand_instance_id": "PDB:7LMT:LIG:P:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:F": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
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          "ligand_instance_id": "PDB:7LMT:LIG:P:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:F": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
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          "ligand_instance_id": "PDB:7LMT:LIG:Q:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:G": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
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          "ligand_instance_id": "PDB:7LMT:LIG:Q:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:G": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
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          "ligand_instance_id": "PDB:7LMT:LIG:R:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7LMT:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:H": {
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          "ligand_instance_id": "PDB:7LMT:LIG:R:Y6V:401:.",
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          "pdb_id": "7LMT",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7LMT:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7LMT",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:A": {
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          "ligand_instance_id": "PDB:7MDN:LIG:I:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:H": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:I:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:I:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:B": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "ligand_instance_id": "PDB:7MDN:LIG:K:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:C": {
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          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
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          "ligand_instance_id": "PDB:7MDN:LIG:K:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:K:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:C": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:L:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:C",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:D": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:L:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:L:Y6V:401:.:SITE:UP:O96028:PWWP1:D",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:D": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:M:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:D",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:E": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
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          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:M:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:M:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:B": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:N:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:E": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:N:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:N:Y6V:401:.:SITE:UP:O96028:PWWP1:E",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:A": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:P:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:A",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:F": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:P:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:P:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:F": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:Q:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:F",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:G": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:Q:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:Q:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:G": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:R:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:G",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        },
        "PDB:7MDN:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:H": {
          "ccd_url": "https://www.rcsb.org/ligand/Y6V",
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "411eea421108aa7f0e46d8c191904297040016aeabc0f48ef43d4a7503888c2a",
          "domain_id": "UP:O96028:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:7MDN:LIG:R:Y6V:401:.",
          "observed_other_component": false,
          "pdb_id": "7MDN",
          "protein_id": "UP:O96028",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:7MDN:LIG:R:Y6V:401:.:SITE:UP:O96028:PWWP1:H",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/7MDN",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        }
      },
      "science_assay_roles": {
        "PWWP:ASSAY:0003": {
          "chemical_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "compound_id": "INCHIKEY:XPHOPAPMJBSLFN-UHFFFAOYSA-N",
          "domain_id": "UP:O96028:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "SPR",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0003",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:MRT866",
          "protein_id": "UP:O96028",
          "remaining_uncertainty": "349 ± 19 nM verified in Results; MRT866-specific SPR construct/protocol, replicate definition and uncertainty statistic remain unresolved. Crystallography 211–350 is not assigned as the binding-assay construct.",
          "reported_cellular": false,
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              "protein_concentration_uM": 20,
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      "search_text": "varenicline inchikey:jqshbvhomnkwft-dtorhvgosa-n varenicline varenicline hdgfl2 up:q7z4v5:pwwp1 8z6o {\"aliases\":[\"varenicline\"],\"ccd_ids\":[\"qmr\"],\"ccd_names\":\"[\\\"varenicline\\\"]\",\"ccd_types\":\"[\\\"non-polymer\\\"]\",\"chemical_id\":\"inchikey:jqshbvhomnkwft-dtorhvgosa-n\",\"connectivity_block\":\"jqshbvhomnkwft\",\"curated_source_sha256\":null,\"curation_version\":\"frozen-v1.2\",\"external_identifiers\":{},\"formal_charge_by_ccd\":\"{\\\"qmr\\\": 0}\",\"formulae\":\"[\\\"c13 h13 n3\\\"]\",\"geometry_note\":\"ccd ideal sdf is a reference chemical geometry, not a deposited bound pose.\",\"identity_status\":\"complete_deposited_inchikey\",\"inchikey\":\"jqshbvhomnkwft-dtorhvgosa-n\",\"inventory_origin\":\"v1_ccd_inventory\",\"isomeric_smiles\":\"c1cnc2cc3c(cc2n1)[c@@h]4c[c@h]3cnc4\",\"primary_name\":\"varenicline\",\"retrieval_date\":\"2026-10-24\",\"smiles_stereo_by_ccd\":\"{\\\"qmr\\\": \\\"c1cnc2cc3c(cc2n1)[c@@h]4c[c@h]3cnc4\\\"}\",\"source_metadata_sha256\":\"{\\\"qmr\\\": \\\"0439a1f642c76ab4c22ef3c5263fd2b3dec2301d7a686de21385d3defd3e9814\\\"}\",\"source_urls\":[\"https://www.rcsb.org/ligand/qmr\"]} pmid:39031937 2024 https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981 pmid:39031937 2024 https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
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            "verification_level": "primary_full_text_sections_verified"
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      "context_structures": [
        {
          "Pfam_contacts_5A": "[{\"auth_asym_id\": \"B\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 15, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.579, \"uniprot_position\": 15}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 18, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.4485, \"uniprot_position\": 18}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 21, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.6336, \"uniprot_position\": 21}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 44, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.5123, \"uniprot_position\": 44}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 47, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.9898, \"uniprot_position\": 47}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 49, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.8063, \"uniprot_position\": 49}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 50, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.5483, \"uniprot_position\": 50}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 51, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.8161, \"uniprot_position\": 51}]",
          "biochemical_activity_inferred": 0,
          "ccd_id": "QMR",
          "chain_contacts_5A": "[{\"auth_asym_id\": \"B\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 15, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.579, \"uniprot_position\": 15}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 18, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.4485, \"uniprot_position\": 18}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 21, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.6336, \"uniprot_position\": 21}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 44, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.5123, \"uniprot_position\": 44}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 47, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.9898, \"uniprot_position\": 47}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 49, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.8063, \"uniprot_position\": 49}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 50, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.5483, \"uniprot_position\": 50}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 51, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.8161, \"uniprot_position\": 51}]",
          "chain_id": "PDB:8Z6O:CHAIN:B:UP:Q7Z4V5",
          "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "contact_class": "native_annotation_core_contact",
          "contact_distance_rank": 1,
          "core_contacts_5A": "[{\"auth_asym_id\": \"B\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 15, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.579, \"uniprot_position\": 15}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 18, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.4485, \"uniprot_position\": 18}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 21, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.6336, \"uniprot_position\": 21}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 44, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.5123, \"uniprot_position\": 44}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 47, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.9898, \"uniprot_position\": 47}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 49, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.8063, \"uniprot_position\": 49}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 50, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.5483, \"uniprot_position\": 50}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 51, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.8161, \"uniprot_position\": 51}]",
          "covalent_connection_ids": "[]",
          "cutoff_angstrom": 5.0,
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "gene": "HDGFL2",
          "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
          "instance": {
            "alternate_locations": "[]",
            "auth_asym_ids": "[\"B\"]",
            "auth_seq_id": "101",
            "ccd_id": "QMR",
            "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
            "component_context": "nonpolymer_component",
            "contacted_polymer_partners": "[{\"description\": \"Hepatoma-derived growth factor-related protein 2\", \"entity_id\": \"1\", \"is_PWWP_family_protein\": true, \"label_asym_id\": \"B\", \"sequence_length\": 93, \"uniprot_ids\": [\"Q7Z4V5\"]}]",
            "covalent_connection_ids": "[]",
            "heavy_atom_row_count": 16,
            "ideal_CCD_SDF_is_source_pose": 0,
            "label_asym_id": "D",
            "label_seq_id": null,
            "ligand_instance_id": "PDB:8Z6O:LIG:D:QMR:101:.",
            "nearest_polypeptide_distance_angstrom": 2.8063,
            "nearest_polypeptide_label_asym_id": "B",
            "occupancy_max": 1.0,
            "occupancy_min": 1.0,
            "pdb_id": "8Z6O",
            "polypeptide_contact_residues_5A": "[{\"auth_asym_id\": \"B\", \"auth_seq_id\": \"15\", \"component\": \"MET\", \"entity_position\": 15, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.579, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"18\", \"component\": \"TYR\", \"entity_position\": 18, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.4485, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"21\", \"component\": \"TRP\", \"entity_position\": 21, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.6336, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"44\", \"component\": \"PHE\", \"entity_position\": 44, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.5123, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"47\", \"component\": \"THR\", \"entity_position\": 47, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.9898, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"49\", \"component\": \"GLU\", \"entity_position\": 49, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 2.8063, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"50\", \"component\": \"THR\", \"entity_position\": 50, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 4.5483, \"uniprot_position\": null}, {\"auth_asym_id\": \"B\", \"auth_seq_id\": \"51\", \"component\": \"ALA\", \"entity_position\": 51, \"label_asym_id\": \"B\", \"minimum_distance_angstrom\": 3.8161, \"uniprot_position\": null}]",
            "pose_kind": "deposited_source_coordinates",
            "reference_model": "1",
            "source_coordinate_file": "Structures/HDGFL2__HUMAN__Q7Z4V5/Co-Crystals/8Z6O/original.cif",
            "source_coordinate_sha256": "80d1a2369d1ebdb0aa342c4273e6641a37cb6e245960b063aeeea5a83bd64ba9",
            "unique_heavy_atom_names": 16
          },
          "ligand_instance_id": "PDB:8Z6O:LIG:D:QMR:101:.",
          "ligand_label_asym_id": "D",
          "minimum_Pfam_distance_angstrom": 2.8063,
          "minimum_chain_distance_angstrom": 2.8063,
          "minimum_core_distance_angstrom": 2.8063,
          "multiple_contacting_mapped_chains": 0,
          "pdb_id": "8Z6O",
          "protein_id": "UP:Q7Z4V5",
          "protein_label_asym_id": "B",
          "rank_interpretation": "Distance rank among mapped chains only; crystal packing and biological site assignment require separate review.",
          "role": "experimentally studied ligand",
          "role_category": "functional",
          "site_id": "PDB:8Z6O:LIG:D:QMR:101:.:SITE:UP:Q7Z4V5:PWWP1:B",
          "source_coordinate_sha256": "80d1a2369d1ebdb0aa342c4273e6641a37cb6e245960b063aeeea5a83bd64ba9"
        }
      ],
      "context_assay_count": 2,
      "context_measured_count": 2,
      "context_bound_count": 1,
      "context_pdb_count": 1,
      "context_negative_count": 0,
      "context_is_probe": false,
      "context_bioactivity_only": false,
      "context_kind": "Measured + bound structure",
      "science": {
        "studied_compound": true,
        "measured_count": 2,
        "structural_research_ligand": true,
        "research_pdb_count": 1,
        "other_component": false,
        "component_site_count": 0,
        "verification_queue": false,
        "positive_direct_binder": true,
        "reported_probe": false,
        "reported_control": false,
        "cellular_activity": false,
        "protein_degradation": false,
        "bioactivity_only": false,
        "research_site_count": 1,
        "unknown_site_count": 0,
        "annotation_roles": [
          "studied",
          "structural"
        ]
      },
      "science_label": "Studied + deposited research ligand",
      "science_profile": {
        "annotation_roles": [
          "studied",
          "structural"
        ],
        "cellular_activity": false,
        "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
        "compound_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
        "entity_kind": "chemical_identity",
        "identity_resolved": true,
        "measured_observation_count": 2,
        "name": "varenicline",
        "other_pdb_component": false,
        "other_site_count": 0,
        "positive_direct_binder": true,
        "primary_view": "studied",
        "protein_degradation": false,
        "reported_control": false,
        "reported_probe": false,
        "rule": "Independent source observations + per-site coordinate role, not universal pharmacology",
        "source_observation_ids": [
          "PWWP:ASSAY:0010",
          "PWWP5:ASSAY:0027"
        ],
        "source_site_ids": [
          "PDB:8Z6O:LIG:D:QMR:101:.:SITE:UP:Q7Z4V5:PWWP1:B"
        ],
        "structural_research_ligand": true,
        "structural_research_site_count": 1,
        "studied_compound": true,
        "total_observation_count": 2,
        "uncertain_site_count": 0,
        "uncertainty": "Classification is evidence- and experiment-scoped; missing assays do not prove nonbinding.",
        "verification_queue": false,
        "verification_status": "source_scoped_mixed"
      },
      "science_site_roles": {
        "PDB:8Z6O:LIG:D:QMR:101:.:SITE:UP:Q7Z4V5:PWWP1:B": {
          "ccd_url": "https://www.rcsb.org/ligand/QMR",
          "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "compound_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "contact_class": "native_annotation_core_contact",
          "coordinate_sha256": "80d1a2369d1ebdb0aa342c4273e6641a37cb6e245960b063aeeea5a83bd64ba9",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "exact_pwwp_contact": true,
          "ligand_instance_id": "PDB:8Z6O:LIG:D:QMR:101:.",
          "observed_other_component": false,
          "pdb_id": "8Z6O",
          "protein_id": "UP:Q7Z4V5",
          "role_code": "reported_studied_structural_ligand",
          "role_group": "research_ligand",
          "rule": "Phase5 exact deposited site role, measured heavy-atom contacts and native-domain scope",
          "site_id": "PDB:8Z6O:LIG:D:QMR:101:.:SITE:UP:Q7Z4V5:PWWP1:B",
          "source_role": "experimentally studied ligand",
          "source_url": "https://www.rcsb.org/structure/8Z6O",
          "structural_research_ligand": true,
          "uncertainty": "Role is source-annotated; deposited proximity alone does not establish solution binding or biological activity.",
          "verification_status": "phase5_derived_deposited_geometry"
        }
      },
      "science_assay_roles": {
        "PWWP:ASSAY:0010": {
          "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "compound_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "NMR chemical-shift perturbation",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP:ASSAY:0010",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:VARENICLINE",
          "protein_id": "UP:Q7Z4V5",
          "remaining_uncertainty": "Full assay buffer, temperature and incubation metadata not transcribed; null means uncurated, not absent.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "S04",
          "source_location": "Results; Figure 1E",
          "source_role": "experimentally_studied_fragment_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
          "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": null,
          "units": "µM",
          "value": 250.0,
          "verification_status": "primary_full_text_sections_verified"
        },
        "PWWP5:ASSAY:0027": {
          "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "compound_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "endpoint": "Kd",
          "evidence_type": "direct_binding",
          "explicitly_negative": false,
          "measured": true,
          "method": "NMR chemical-shift perturbation",
          "molecular_entity_type": "small_molecule_preparation",
          "observation_id": "PWWP5:ASSAY:0027",
          "operator": "=",
          "positive_direct_binder": true,
          "preparation_id": "PREP:VARENICLINE",
          "protein_id": "UP:Q7Z4V5",
          "remaining_uncertainty": "Y18S mutant measurement; must not be pooled with wild-type affinity. Construct is the source HDGFRP2 PWWP expression fragment (1–93) carrying the stated mutation. Replicate number and titration-specific temperature are not independently specified.",
          "reported_cellular": false,
          "reported_control": false,
          "reported_probe": false,
          "rule": "Phase5 source-curated evidence_class, material, target_scope, source role; no inferred affinities",
          "source_id": "P5:S:WEI2024",
          "source_location": "Results; Figure 2E",
          "source_role": "experimentally_studied_ligand",
          "source_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "studied_compound": true,
          "target_scope": "domain_specific",
          "target_variant": "Y18S",
          "units": "mM",
          "value": 0.78,
          "verification_status": "primary_source_verified"
        }
      },
      "example": {
        "DMSO_percent": null,
        "abstract_reported_endpoint": null,
        "abstract_reported_method": null,
        "abstract_reported_units": null,
        "abstract_reported_value": null,
        "assay_construct_end": 93,
        "assay_construct_start": 1,
        "assay_record_id": "PWWP:ASSAY:0010",
        "assay_type": "NMR chemical-shift perturbation Kd",
        "assay_value_transferred_to_modeled_stereoisomers": 0,
        "audit_decision": "retain_with_explicit_endpoint_and_identity",
        "baseline_assay_record": 1,
        "buffer": "HEPES-buffered saline; exact buffer/salt concentrations not restated in CSP subsection",
        "ccd_id": "QMR",
        "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
        "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
        "chemical_identity_status": "exact_single_CCD_identity",
        "component_context": null,
        "compound_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
        "compound_name": "varenicline",
        "conditions": "{\"fit_model\": \"1:1 binding; global fit with shared Kd\", \"ligand_to_protein_molar_ratio_range\": [0, 6], \"protein_concentration_uM\": 100, \"protein_construct\": \"HDGFL2 1–93\"}",
        "crystallographic_component_ids": null,
        "curation_version": "frozen-v1.2",
        "domain": "PWWP",
        "domain_id": "UP:Q7Z4V5:PWWP1",
        "endpoint": "Kd",
        "endpoint_label_status": null,
        "evidence_class": "direct_binding_affinity",
        "evidence_location": "Results; Figure 1E",
        "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
        "gene": "HDGFL2",
        "interpretation": "Converted from 0.25 ± 0.04 mM. Receptor pharmacology in other systems is not evidence of PWWP potency.",
        "is_measured": true,
        "is_negative": false,
        "method": "NMR chemical-shift perturbation",
        "molecular_entity_type": "small_molecule_preparation",
        "normalized_exact_uM": 250.0,
        "numeric_transcription_status": "matches_primary_report",
        "numeric_value_inferred_from_structure": 0,
        "organism": "Homo sapiens",
        "pH": 7.4,
        "pdb_id": "8Z6O",
        "preparation_id": "PREP:VARENICLINE",
        "protein_id": "UP:Q7Z4V5",
        "publication_year": 2024,
        "qualitative_result": null,
        "reference_id": "PMID:39031937",
        "remaining_uncertainty": "Full assay buffer, temperature and incubation metadata not transcribed; null means uncurated, not absent.",
        "replicates": null,
        "role": "experimentally_studied_fragment_ligand",
        "source_component_url": null,
        "source_database": "Primary literature (frozen Atlas)",
        "source_id": "S04",
        "source_measurement_key": "2b9c01d4150ca3f35a87bce9ed5d4dde79bfafc9ecb109e3891ecdca18c484f1",
        "source_original": {
          "DMSO_percent": null,
          "abstract_reported_endpoint": null,
          "abstract_reported_method": null,
          "abstract_reported_units": null,
          "abstract_reported_value": null,
          "assay_construct_end": 93,
          "assay_construct_start": 1,
          "assay_record_id": "PWWP:ASSAY:0010",
          "assay_type": "NMR chemical-shift perturbation Kd",
          "assay_value_transferred_to_modeled_stereoisomers": 0,
          "audit_decision": "retain_with_explicit_endpoint_and_identity",
          "baseline_assay_record": 1,
          "buffer": "HEPES-buffered saline; exact buffer/salt concentrations not restated in CSP subsection",
          "ccd_id": "QMR",
          "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
          "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "chemical_identity_status": "exact_single_CCD_identity",
          "component_context": null,
          "compound_name": "varenicline",
          "conditions": "{\"fit_model\": \"1:1 binding; global fit with shared Kd\", \"ligand_to_protein_molar_ratio_range\": [0, 6], \"protein_concentration_uM\": 100, \"protein_construct\": \"HDGFL2 1–93\"}",
          "crystallographic_component_ids": null,
          "domain": "PWWP",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "endpoint_label_status": null,
          "evidence_class": "direct_binding_affinity",
          "evidence_location": "Results; Figure 1E",
          "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
          "gene": "HDGFL2",
          "interpretation": "Converted from 0.25 ± 0.04 mM. Receptor pharmacology in other systems is not evidence of PWWP potency.",
          "molecular_entity_type": "small_molecule_preparation",
          "numeric_transcription_status": "matches_primary_report",
          "numeric_value_inferred_from_structure": 0,
          "pH": 7.4,
          "pdb_id": "8Z6O",
          "preparation_id": "PREP:VARENICLINE",
          "protein_id": "UP:Q7Z4V5",
          "qualitative_result": null,
          "reference_id": "PMID:39031937",
          "remaining_uncertainty": "Full assay buffer, temperature and incubation metadata not transcribed; null means uncurated, not absent.",
          "replicates": null,
          "role": "experimentally_studied_fragment_ligand",
          "source_component_url": null,
          "source_id": "S04",
          "source_reported_uncertainty": "0.04",
          "source_reported_units": "mM",
          "source_reported_value": "0.25",
          "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
          "temperature_C": null,
          "uncertainty": 40.0,
          "uncertainty_type": "fitting_error",
          "uncertainty_uM": 40.0,
          "unit_conversion": "0.25 mM × 1000 = 250 µM; 0.04 mM × 1000 = 40 µM",
          "units": "µM",
          "value": 250.0,
          "value_operator": "=",
          "value_uM": 250.0,
          "verification_level": "primary_full_text_sections_verified"
        },
        "source_reported_uncertainty": "0.04",
        "source_reported_units": "mM",
        "source_reported_value": "0.25",
        "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
        "target_scope": "domain_specific",
        "temperature_C": null,
        "uncertainty": 40.0,
        "uncertainty_type": "fitting_error",
        "uncertainty_uM": 40.0,
        "unit_conversion": "0.25 mM × 1000 = 250 µM; 0.04 mM × 1000 = 40 µM",
        "units": "µM",
        "value": 250.0,
        "value_operator": "=",
        "value_uM": 250.0,
        "verification_level": "primary_full_text_sections_verified"
      },
      "matched_observations": [
        {
          "DMSO_percent": null,
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          "abstract_reported_units": null,
          "abstract_reported_value": null,
          "assay_construct_end": 93,
          "assay_construct_start": 1,
          "assay_record_id": "PWWP:ASSAY:0010",
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          "assay_value_transferred_to_modeled_stereoisomers": 0,
          "audit_decision": "retain_with_explicit_endpoint_and_identity",
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          "buffer": "HEPES-buffered saline; exact buffer/salt concentrations not restated in CSP subsection",
          "ccd_id": "QMR",
          "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
          "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
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          "compound_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
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          "crystallographic_component_ids": null,
          "curation_version": "frozen-v1.2",
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          "domain_id": "UP:Q7Z4V5:PWWP1",
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          "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
          "gene": "HDGFL2",
          "interpretation": "Converted from 0.25 ± 0.04 mM. Receptor pharmacology in other systems is not evidence of PWWP potency.",
          "is_measured": true,
          "is_negative": false,
          "method": "NMR chemical-shift perturbation",
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          "numeric_transcription_status": "matches_primary_report",
          "numeric_value_inferred_from_structure": 0,
          "organism": "Homo sapiens",
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          "publication_year": 2024,
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          "reference_id": "PMID:39031937",
          "remaining_uncertainty": "Full assay buffer, temperature and incubation metadata not transcribed; null means uncurated, not absent.",
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          "role": "experimentally_studied_fragment_ligand",
          "source_component_url": null,
          "source_database": "Primary literature (frozen Atlas)",
          "source_id": "S04",
          "source_measurement_key": "2b9c01d4150ca3f35a87bce9ed5d4dde79bfafc9ecb109e3891ecdca18c484f1",
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            "audit_decision": "retain_with_explicit_endpoint_and_identity",
            "baseline_assay_record": 1,
            "buffer": "HEPES-buffered saline; exact buffer/salt concentrations not restated in CSP subsection",
            "ccd_id": "QMR",
            "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
            "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
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            "conditions": "{\"fit_model\": \"1:1 binding; global fit with shared Kd\", \"ligand_to_protein_molar_ratio_range\": [0, 6], \"protein_concentration_uM\": 100, \"protein_construct\": \"HDGFL2 1–93\"}",
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            "domain": "PWWP",
            "domain_id": "UP:Q7Z4V5:PWWP1",
            "endpoint_label_status": null,
            "evidence_class": "direct_binding_affinity",
            "evidence_location": "Results; Figure 1E",
            "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
            "gene": "HDGFL2",
            "interpretation": "Converted from 0.25 ± 0.04 mM. Receptor pharmacology in other systems is not evidence of PWWP potency.",
            "molecular_entity_type": "small_molecule_preparation",
            "numeric_transcription_status": "matches_primary_report",
            "numeric_value_inferred_from_structure": 0,
            "pH": 7.4,
            "pdb_id": "8Z6O",
            "preparation_id": "PREP:VARENICLINE",
            "protein_id": "UP:Q7Z4V5",
            "qualitative_result": null,
            "reference_id": "PMID:39031937",
            "remaining_uncertainty": "Full assay buffer, temperature and incubation metadata not transcribed; null means uncurated, not absent.",
            "replicates": null,
            "role": "experimentally_studied_fragment_ligand",
            "source_component_url": null,
            "source_id": "S04",
            "source_reported_uncertainty": "0.04",
            "source_reported_units": "mM",
            "source_reported_value": "0.25",
            "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
            "temperature_C": null,
            "uncertainty": 40.0,
            "uncertainty_type": "fitting_error",
            "uncertainty_uM": 40.0,
            "unit_conversion": "0.25 mM × 1000 = 250 µM; 0.04 mM × 1000 = 40 µM",
            "units": "µM",
            "value": 250.0,
            "value_operator": "=",
            "value_uM": 250.0,
            "verification_level": "primary_full_text_sections_verified"
          },
          "source_reported_uncertainty": "0.04",
          "source_reported_units": "mM",
          "source_reported_value": "0.25",
          "source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
          "target_scope": "domain_specific",
          "temperature_C": null,
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          "uncertainty_type": "fitting_error",
          "uncertainty_uM": 40.0,
          "unit_conversion": "0.25 mM × 1000 = 250 µM; 0.04 mM × 1000 = 40 µM",
          "units": "µM",
          "value": 250.0,
          "value_operator": "=",
          "value_uM": 250.0,
          "verification_level": "primary_full_text_sections_verified"
        },
        {
          "assay_construct_end": 93,
          "assay_construct_start": 1,
          "assay_context": "purified_mutant_domain",
          "assay_organism": "Homo sapiens",
          "assay_record_id": "PWWP5:ASSAY:0027",
          "assay_type": "NMR chemical-shift perturbation Kd",
          "assay_value_transferred_to_modeled_stereoisomers": false,
          "ccd_id": null,
          "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "compound_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
          "compound_name": "varenicline",
          "conditions": {
            "binding_model": "1:1 global fit of perturbed residues",
            "buffer": "HEPES-buffered saline; CSP subsection does not separately give HEPES/NaCl concentrations",
            "ligand_protein_molar_ratio_range": [
              0,
              6
            ],
            "pH": 7.4,
            "protein_concentration_mM": 0.1,
            "target_variant": "Y18S"
          },
          "curation_version": "phase5-1.0.0",
          "domain": "PWWP1",
          "domain_id": "UP:Q7Z4V5:PWWP1",
          "endpoint": "Kd",
          "evidence_class": "direct_binding_affinity",
          "evidence_location": "Results; Figure 2E",
          "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
          "gene": "HDGFL2",
          "inclusion_rationale": "Primary source explicitly identifies this preparation, target context and observation.",
          "is_measured": true,
          "is_negative": false,
          "method": "NMR chemical-shift perturbation",
          "normalized_exact_uM": 780.0,
          "numeric_transcription_status": "source_preserved",
          "numeric_value_inferred_from_structure": false,
          "organism": "Homo sapiens",
          "pH": 7.4,
          "pdb_id": null,
          "preparation_id": "PREP:VARENICLINE",
          "protein_id": "UP:Q7Z4V5",
          "publication_year": 2024,
          "reference_id": "PMID:39031937",
          "remaining_uncertainty": "Y18S mutant measurement; must not be pooled with wild-type affinity. Construct is the source HDGFRP2 PWWP expression fragment (1–93) carrying the stated mutation. Replicate number and titration-specific temperature are not independently specified.",
          "replicates": null,
          "retrieval_date": "2026-10-26",
          "role": "experimentally_studied_ligand",
          "source_database": "Primary literature (Phase 5)",
          "source_id": "P5:S:WEI2024",
          "source_measurement_key": "ffcc722dc4af4f80ffe47c5d374303804d84ce0ece347772ae8ec971c8c8d9c4",
          "source_original": {
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            "assay_construct_start": 1,
            "assay_context": "purified_mutant_domain",
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            "assay_record_id": "PWWP5:ASSAY:0027",
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            "assay_value_transferred_to_modeled_stereoisomers": false,
            "ccd_id": null,
            "chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
            "compound_name": "varenicline",
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              "binding_model": "1:1 global fit of perturbed residues",
              "buffer": "HEPES-buffered saline; CSP subsection does not separately give HEPES/NaCl concentrations",
              "ligand_protein_molar_ratio_range": [
                0,
                6
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              "pH": 7.4,
              "protein_concentration_mM": 0.1,
              "target_variant": "Y18S"
            },
            "domain": "PWWP1",
            "domain_id": "UP:Q7Z4V5:PWWP1",
            "endpoint": "Kd",
            "evidence_class": "direct_binding_affinity",
            "evidence_location": "Results; Figure 2E",
            "evidence_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
            "gene": "HDGFL2",
            "inclusion_rationale": "Primary source explicitly identifies this preparation, target context and observation.",
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            "numeric_transcription_status": "source_preserved",
            "numeric_value_inferred_from_structure": false,
            "pH": 7.4,
            "pdb_id": null,
            "preparation_id": "PREP:VARENICLINE",
            "protein_id": "UP:Q7Z4V5",
            "publication_year": 2024,
            "reference_id": "PMID:39031937",
            "remaining_uncertainty": "Y18S mutant measurement; must not be pooled with wild-type affinity. Construct is the source HDGFRP2 PWWP expression fragment (1–93) carrying the stated mutation. Replicate number and titration-specific temperature are not independently specified.",
            "replicates": null,
            "retrieval_date": "2026-10-26",
            "role": "experimentally_studied_ligand",
            "source_id": "P5:S:WEI2024",
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            "source_reported_units": "mM",
            "source_reported_value": "0.78",
            "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
            "target_variant": "Y18S",
            "uncertainty": 0.05,
            "uncertainty_type": "fitting error",
            "uncertainty_uM": 50.0,
            "unit_conversion": "mM × 1000 = µM",
            "units": "mM",
            "value": 0.78,
            "value_operator": "=",
            "value_uM": 780.0,
            "verification_level": "primary_source_verified",
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          },
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          "source_reported_units": "mM",
          "source_reported_value": "0.78",
          "source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrieved",
          "target_scope": "domain_specific",
          "target_variant": "Y18S",
          "uncertainty": 0.05,
          "uncertainty_type": "fitting error",
          "uncertainty_uM": 50.0,
          "unit_conversion": "mM × 1000 = µM",
          "units": "mM",
          "value": 0.78,
          "value_operator": "=",
          "value_uM": 780.0,
          "verification_level": "primary_source_verified",
          "version": "phase5.chemical_curation.1.1.0"
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      ],
      "matched_assay_count": 2
    }
  ]
}