{
  "science_site": {
    "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",
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    "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",
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    "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"
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  "structure": {
    "pdb_id": "6XCG",
    "title": "Histone-lysine N-methyltransferase NSD2-PWWP1 with compound UNC6934",
    "method": "[\"X-RAY DIFFRACTION\"]",
    "resolution_angstrom": 1.64,
    "primary_classification": "Co-Crystals",
    "observed_PWWP": 1,
    "review_required": 1,
    "review_reasons": "[\"Unresolved chemical role: UNX\"]",
    "release_date": "2020-07-22T00:00:00.000+00:00",
    "source_url": "https://www.rcsb.org/structure/6XCG",
    "coordinate_url": "https://files.rcsb.org/download/6XCG.cif",
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      "entity_id": "1",
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      "core_definition_source": "UniProtKB reviewed feature",
      "domain_id": "UP:O96028:PWWP1",
      "entity_id": "1",
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      "isolated_PWWP_containing_construct_candidate": 1,
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      "native_core_start": 222,
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    "core_definition_source": "UniProtKB reviewed feature",
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    "entity_id": "1",
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    "pfam_entity_ranges": "[[14, 125]]",
    "protein_id": "UP:O96028",
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      "biochemical_activity_inferred": 0,
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      "contact_class": "native_annotation_core_contact",
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      "cutoff_angstrom": 5.0,
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      "minimum_chain_distance_angstrom": 2.8613,
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      "component_context": "nonpolymer_component",
      "pose_kind": "deposited_source_coordinates",
      "chemical_name": "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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      "Pfam_contacts_5A": "[]",
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      "ccd_id": "UNX",
      "chain_contacts_5A": "[]",
      "chain_id": "PDB:6XCG:CHAIN:A:UP:O96028",
      "chemical_id": "CCD_UNRESOLVED:UNX",
      "contact_class": "no_contact_with_mapped_chain_in_asymmetric_unit",
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      "covalent_connection_ids": "[]",
      "cutoff_angstrom": 5.0,
      "domain_id": "UP:O96028:PWWP1",
      "gene": "NSD2",
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      "Pfam_contacts_5A": "[]",
      "biochemical_activity_inferred": 0,
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      "chain_id": "PDB:6XCG:CHAIN:A:UP:O96028",
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      "contact_class": "no_contact_with_mapped_chain_in_asymmetric_unit",
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      "core_contacts_5A": "[]",
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      "cutoff_angstrom": 5.0,
      "domain_id": "UP:O96028:PWWP1",
      "gene": "NSD2",
      "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
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      "chemical_name": "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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    {
      "Pfam_contacts_5A": "[]",
      "biochemical_activity_inferred": 0,
      "ccd_id": "UNX",
      "chain_contacts_5A": "[]",
      "chain_id": "PDB:6XCG:CHAIN:A:UP:O96028",
      "chemical_id": "CCD_UNRESOLVED:UNX",
      "contact_class": "no_contact_with_mapped_chain_in_asymmetric_unit",
      "contact_distance_rank": null,
      "core_contacts_5A": "[]",
      "covalent_connection_ids": "[]",
      "cutoff_angstrom": 5.0,
      "domain_id": "UP:O96028:PWWP1",
      "gene": "NSD2",
      "geometry_scope": "first deposited model; asymmetric unit; heavy atoms with occupancy >0; alternate locations retained; no symmetry expansion",
      "ligand_instance_id": "PDB:6XCG:LIG:G:UNX:403:.",
      "ligand_label_asym_id": "G",
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      "minimum_chain_distance_angstrom": 18.5227,
      "minimum_core_distance_angstrom": 18.5227,
      "multiple_contacting_mapped_chains": 0,
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      "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.",
      "site_id": "PDB:6XCG:LIG:G:UNX:403:.:SITE:UP:O96028:PWWP1:A",
      "source_coordinate_sha256": "2c370701c9b83de7ae6137f91d2130519a48c261a93ec5bc480dfcc3bc982200",
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      "occupancy_min": 1.0,
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      "unique_heavy_atom_names": 1,
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      "pose_kind": "deposited_source_coordinates",
      "chemical_name": "UNKNOWN ATOM OR ION",
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    },
    {
      "Pfam_contacts_5A": "[]",
      "biochemical_activity_inferred": 0,
      "ccd_id": "V01",
      "chain_contacts_5A": "[]",
      "chain_id": "PDB:6XCG:CHAIN:A:UP:O96028",
      "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
      "contact_class": "no_contact_with_mapped_chain_in_asymmetric_unit",
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      "core_contacts_5A": "[]",
      "covalent_connection_ids": "[]",
      "cutoff_angstrom": 5.0,
      "domain_id": "UP:O96028:PWWP1",
      "gene": "NSD2",
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      "ligand_instance_id": "PDB:6XCG:LIG:I:V01:401:.",
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      "ccd_id": "UNX",
      "chain_contacts_5A": "[]",
      "chain_id": "PDB:6XCG:CHAIN:A:UP:O96028",
      "chemical_id": "CCD_UNRESOLVED:UNX",
      "contact_class": "no_contact_with_mapped_chain_in_asymmetric_unit",
      "contact_distance_rank": null,
      "core_contacts_5A": "[]",
      "covalent_connection_ids": "[]",
      "cutoff_angstrom": 5.0,
      "domain_id": "UP:O96028:PWWP1",
      "gene": "NSD2",
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      "ligand_instance_id": "PDB:6XCG:LIG:L:UNX:404:.",
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      "protein_id": "UP:O96028",
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      "site_id": "PDB:6XCG:LIG:L:UNX:404:.:SITE:UP:O96028:PWWP1:A",
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      "pose_kind": "deposited_source_coordinates",
      "chemical_name": "UNKNOWN ATOM OR ION",
      "inchikey": null
    },
    {
      "Pfam_contacts_5A": "[]",
      "biochemical_activity_inferred": 0,
      "ccd_id": "UNX",
      "chain_contacts_5A": "[]",
      "chain_id": "PDB:6XCG:CHAIN:A:UP:O96028",
      "chemical_id": "CCD_UNRESOLVED:UNX",
      "contact_class": "no_contact_with_mapped_chain_in_asymmetric_unit",
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      "core_contacts_5A": "[]",
      "covalent_connection_ids": "[]",
      "cutoff_angstrom": 5.0,
      "domain_id": "UP:O96028:PWWP1",
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      "ligand_instance_id": "PDB:6XCG:LIG:J:UNX:402:.",
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      "site_id": "PDB:6XCG:LIG:J:UNX:402:.:SITE:UP:O96028:PWWP1:A",
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    },
    {
      "Pfam_contacts_5A": "[]",
      "biochemical_activity_inferred": 0,
      "ccd_id": "UNX",
      "chain_contacts_5A": "[]",
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      "chemical_id": "CCD_UNRESOLVED:UNX",
      "contact_class": "no_contact_with_mapped_chain_in_asymmetric_unit",
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      "core_contacts_5A": "[]",
      "covalent_connection_ids": "[]",
      "cutoff_angstrom": 5.0,
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    "chain_id": "PDB:6XCG:CHAIN:A:UP:O96028",
    "chemical_id": "INCHIKEY:KOZGEDUWAQFVAV-UHFFFAOYSA-N",
    "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\": 21, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.8951, \"uniprot_position\": 230}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"233\", \"component\": \"TYR\", \"entity_position\": 24, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3246, \"uniprot_position\": 233}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"236\", \"component\": \"TRP\", \"entity_position\": 27, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.5457, \"uniprot_position\": 236}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"266\", \"component\": \"PHE\", \"entity_position\": 57, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.1885, \"uniprot_position\": 266}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"267\", \"component\": \"PHE\", \"entity_position\": 58, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.3736, \"uniprot_position\": 267}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"268\", \"component\": \"GLY\", \"entity_position\": 59, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.1722, \"uniprot_position\": 268}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"269\", \"component\": \"ASP\", \"entity_position\": 60, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.2062, \"uniprot_position\": 269}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"270\", \"component\": \"ALA\", \"entity_position\": 61, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 2.8613, \"uniprot_position\": 270}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"271\", \"component\": \"PRO\", \"entity_position\": 62, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.3291, \"uniprot_position\": 271}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"272\", \"component\": \"GLU\", \"entity_position\": 63, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.0201, \"uniprot_position\": 272}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"273\", \"component\": \"ARG\", \"entity_position\": 64, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.0145, \"uniprot_position\": 273}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"274\", \"component\": \"ALA\", \"entity_position\": 65, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 3.6628, \"uniprot_position\": 274}, {\"auth_asym_id\": \"A\", \"auth_seq_id\": \"275\", \"component\": \"TRP\", \"entity_position\": 66, \"label_asym_id\": \"A\", \"minimum_distance_angstrom\": 4.5773, \"uniprot_position\": 275}]",
    "covalent_connection_ids": "[]",
    "cutoff_angstrom": 5.0,
    "domain_id": "UP:O96028:PWWP1",
    "gene": "NSD2",
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    "multiple_contacting_mapped_chains": 0,
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    "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.",
    "site_id": "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A",
    "source_coordinate_sha256": "2c370701c9b83de7ae6137f91d2130519a48c261a93ec5bc480dfcc3bc982200",
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    "occupancy_min": 1.0,
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    "component_context": "nonpolymer_component",
    "pose_kind": "deposited_source_coordinates",
    "chemical_name": "N-cyclopropyl-3-oxo-N-({4-[(pyrimidin-4-yl)carbamoyl]phenyl}methyl)-3,4-dihydro-2H-1,4-benzoxazine-7-carboxamide",
    "inchikey": "KOZGEDUWAQFVAV-UHFFFAOYSA-N"
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  "quality": {
    "quality_id": "6XCG:A:UP:O96028:PWWP1",
    "pdb_id": "6XCG",
    "domain_id": "UP:O96028:PWWP1",
    "label_asym_id": "A",
    "gene": "NSD2",
    "assessment_status": "assessed_packaged_coordinates",
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    "observed_core_residue_count": 65,
    "unobserved_core_positions": [],
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    "missing_core_heavy_atom_count": 6,
    "missing_core_backbone_atom_count": 0,
    "missing_core_sidechain_atom_count": 6,
    "core_residues_with_alternates": 1,
    "source_sequence_mismatches": [],
    "mapped_construct_ranges": [
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        350
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    ],
    "broader_Pfam_entity_ranges": [
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    ],
    "residues": [
      {
        "canonical_position": 211,
        "entity_position": 2,
        "component": "GLY",
        "observed_components": [],
        "label_asym_id": "A",
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        "insertion_code": null,
        "observed": false,
        "observed_atom_names": [],
        "expected_standard_heavy_atoms": [
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        "standard_template_available": true,
        "missing_standard_heavy_atoms": [],
        "missing_backbone_atoms": [],
        "missing_sidechain_atoms": [],
        "alternate_conformers": [],
        "alternate_completeness": [],
        "occupancy_min": null,
        "occupancy_max": null,
        "within_annotation_core": false,
        "within_broader_Pfam": false
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    "core_observed_substitutions": 0,
    "substitutions": "[]",
    "duplicate_canonical_positions": "[]",
    "experimental_method": "X-RAY DIFFRACTION",
    "resolution_angstrom": 1.64,
    "primary_classification": "Co-Crystals",
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    "source_cif": "Structures/NSD2__HUMAN__O96028/Co-Crystals/6XCG/original.cif",
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      "ccd_id": "V01",
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      "domain": "PWWP1",
      "domain_id": "UP:O96028:PWWP1",
      "endpoint_label_status": null,
      "evidence_class": "direct_binding_affinity",
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      "protein_id": "UP:O96028",
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      "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.",
      "replicates": "3 (triplicate experiments; independence level not specified)",
      "role": "reported_chemical_probe",
      "source_component_url": null,
      "source_id": "S02",
      "source_reported_uncertainty": "8",
      "source_reported_units": "nM",
      "source_reported_value": "91",
      "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,
      "uncertainty": 8.0,
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      "uncertainty_uM": 0.008,
      "unit_conversion": null,
      "units": "nM",
      "value": 91.0,
      "value_operator": "=",
      "value_uM": 0.091,
      "verification_level": "primary_full_text_sections_verified",
      "link_semantics": "same exact chemical identity and native domain; construct equivalence not assumed",
      "site_id": "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A"
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      "buffer": "150 mM NaCl; 20 mM Tris; 0.01% BSA; 0.01% NP-40; 1 mM DTT (DTT omitted from bead buffer)",
      "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_name": "UNC6934",
      "conditions": "{\"phase3_verification\": \"SV02A\", \"protein_construct\": \"NSD2 208–368\", \"readout\": \"His-NSD2-PWWP1 binding to H3K36me2 designer nucleosome\", \"tag\": \"6His\", \"temperature_scope\": \"23°C compound/protein and nucleosome preincubation; bead incubation room temperature\"}",
      "crystallographic_component_ids": null,
      "domain": "PWWP1",
      "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",
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      "pdb_id": "6XCG",
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      "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",
      "link_semantics": "same exact chemical identity and native domain; construct equivalence not assumed",
      "site_id": "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A"
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    {
      "DMSO_percent": null,
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      "abstract_reported_value": null,
      "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",
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      "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",
      "component_context": null,
      "compound_name": "UNC6934",
      "conditions": "{\"cell_line\": \"U2OS\", \"readout\": \"NSD2 PWWP1–histone H3.3 interaction\"}",
      "crystallographic_component_ids": null,
      "domain": "PWWP1",
      "domain_id": "UP:O96028:PWWP1",
      "endpoint_label_status": "Results/Figure use EC50, Discussion uses IC50; neutral half-response retained",
      "evidence_class": "cellular_interaction_response",
      "evidence_location": "Results: cellular target engagement; Figure 4d",
      "evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9189931/",
      "gene": "NSD2",
      "interpretation": "Main Results calls this EC50; Discussion calls it IC50. Original value retained without conflating it with Kd.",
      "molecular_entity_type": "small_molecule_preparation",
      "numeric_transcription_status": "matches_primary_report",
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      "pdb_id": "6XCG",
      "preparation_id": "PREP:UNC6934",
      "protein_id": "UP:O96028",
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      "reference_id": "PMID:34782742",
      "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.",
      "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,
      "uncertainty": 0.25,
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      "units": "µM",
      "value": 1.23,
      "value_operator": "=",
      "value_uM": 1.23,
      "verification_level": "primary_full_text_sections_verified",
      "link_semantics": "same exact chemical identity and native domain; construct equivalence not assumed",
      "site_id": "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A"
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      "DMSO_percent": 0.3,
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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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      "compound_name": "UNC6934",
      "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",
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      "preparation_id": "PREP:UNC6934",
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      "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": "reported_chemical_probe",
      "source_component_url": null,
      "source_id": "S05",
      "source_reported_uncertainty": "0.03",
      "source_reported_units": "µM",
      "source_reported_value": "0.24",
      "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": 0.03,
      "uncertainty_type": "SD",
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      "value_operator": "=",
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      "verification_level": "primary_full_text_sections_verified",
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      "site_id": "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A"
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      "ccd_id": "V01",
      "ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
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      "component_context": null,
      "compound_name": "UNC6934",
      "conditions": "{\"assay_substitutions\": \"not listed for assay constructs; 9FOE crystallographic mutants kept separate\", \"phase3_verification\": \"SV05A/SV05B\", \"protein_construct\": \"NSD2 211–350\", \"purified_tags\": \"N-terminal GS remnant; C-terminal Avi; biotinylated after GST/6His removal\", \"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:UNC6934",
      "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": "reported_chemical_probe",
      "source_component_url": null,
      "source_id": "S05",
      "source_reported_uncertainty": "0.19",
      "source_reported_units": "µM",
      "source_reported_value": "1.33",
      "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": 0.19,
      "uncertainty_type": "SD",
      "uncertainty_uM": 0.19,
      "unit_conversion": null,
      "units": "µM",
      "value": 1.33,
      "value_operator": "=",
      "value_uM": 1.33,
      "verification_level": "primary_full_text_sections_verified",
      "link_semantics": "same exact chemical identity and native domain; construct equivalence not assumed",
      "site_id": "PDB:6XCG:LIG:D:V01:401:.:SITE:UP:O96028:PWWP1:A"
    }
  ],
  "local_coordinates": true,
  "coordinate_url": "/coordinates/6XCG.cif",
  "interpretation": "Heavy-atom distances use the first deposited model and asymmetric unit, occupancy >0 and retained alternate locations. No symmetry expansion or affinity inference.",
  "quality_scope": "Detailed atom completeness only for the three packaged original-coordinate files; quality uses observed atom-name union across positive-occupancy alternate conformers, with per-alt differences retained. Missing entire residues are separate. Nonstandard amino-acid templates are unassessed. No density reinterpretation, receptor repair, docking or MD.",
  "analysis_id": "PWWP_POCKET_QUALITY_1.0.0",
  "source_conflict": null
}
