Resolved chemical identity

2-(N-MORPHOLINO)-ETHANESULFONIC ACID

Other PDB component · not a studied ligand

complete_deposited_InChIKey

0 assay / association records0 preparations0 research-ligand PDB entries

No deposited PWWP research-ligand geometry is classified for this preparation in the selected release. Deposition of a buffer/ion is not binding evidence.

Clinical / development status: Not independently curated. A chemical probe classification does not imply medicinal approval.

Identity is separate from preparation

Chemical identity

Stable identity: INCHIKEY:SXGZJKUKBWWHRA-UHFFFAOYSA-N
Full InChIKey: SXGZJKUKBWWHRA-UHFFFAOYSA-N
Source identity status: complete deposited InChIKey
Deposited CCD identifiers: MES
External identifiers: See deposited identity and source links

Reference formula: C6H13NO4S
Calculated molecular weight: 195.24
Calculated descriptors: cLogP -2.5533 · TPSA 70.87 Å² · HBD 1 · HBA 4RDKit 2025.09.3; calculations for this source identity, not experimental measurements.
Depiction validation: verified smiles full inchikey match

SMILES, InChI & complete identity record

Isomeric SMILES: C1COCC[NH+]1CCS(=O)(=O)[O-]
InChI: Not curated

{
  "aliases": [
    "2-(N-MORPHOLINO)-ETHANESULFONIC ACID"
  ],
  "ccd_ids": [
    "MES"
  ],
  "ccd_names": "[\"2-(N-MORPHOLINO)-ETHANESULFONIC ACID\"]",
  "ccd_types": "[\"non-polymer\"]",
  "chemical_id": "INCHIKEY:SXGZJKUKBWWHRA-UHFFFAOYSA-N",
  "connectivity_block": "SXGZJKUKBWWHRA",
  "curated_source_sha256": null,
  "curation_version": "frozen-v1.2",
  "external_identifiers": {},
  "formal_charge_by_ccd": "{\"MES\": 0}",
  "formulae": "[\"C6 H13 N O4 S\"]",
  "geometry_note": "CCD ideal SDF is a reference chemical geometry, not a deposited bound pose.",
  "identity_status": "complete_deposited_InChIKey",
  "inchikey": "SXGZJKUKBWWHRA-UHFFFAOYSA-N",
  "inventory_origin": "v1_CCD_inventory",
  "isomeric_smiles": "C1COCC[NH+]1CCS(=O)(=O)[O-]",
  "primary_name": "2-(N-MORPHOLINO)-ETHANESULFONIC ACID",
  "retrieval_date": "2026-10-24",
  "smiles_stereo_by_ccd": "{\"MES\": \"C1COCC[NH+]1CCS(=O)(=O)[O-]\"}",
  "source_metadata_sha256": "{\"MES\": \"8af0b807d750f0cef5c5d653b78e0d36a7899c0400fa8bf71a04b7ff3abdb28a\"}",
  "source_urls": [
    "https://www.rcsb.org/ligand/MES"
  ]
}

Measured target and original context

Bioactivity & experimental observations

Download assay CSV

Each row is one source-specific observation. Repeated measurements of this compound are not independent compounds. Direct binding, functional displacement and cellular outcomes retain their distinct endpoints.

Preparation	Tested target & construct	Method / endpoint	Original observation	Conditions & uncertainty	Source & verification
No observations match these filters. Missing curation is not evidence of biological inactivity.

Exact deposited instances

Experimental structures

Native-core and broader Pfam proximity are distinguished from contacts elsewhere in a protein. Each action opens the actual deposited ligand instance. Geometric proximity does not supply a measured binding affinity.

Entry / ligand	Native domain & protein chain	Geometric evidence	Minimum distance	Inspect
6IIP · MESPDB:6IIP:LIG:C:MES:101:.	HDGFL3 PWWP1Protein label chain A · ligand label chain C	native annotation core contactbuffer/additivebuffer component · other component. Deposited geometry is not solution affinity.	Core: 2.7633 Å Pfam: 2.7633 Å	View deposited instance
6IIP · MESPDB:6IIP:LIG:C:MES:101:.	HDGFL3 PWWP1Protein label chain B · ligand label chain C	native annotation core contactbuffer/additivebuffer component · other component. Deposited geometry is not solution affinity.	Core: 2.9491 Å Pfam: 2.9491 Å	View deposited instance
6IIP · MESPDB:6IIP:LIG:G:MES:101:.	HDGFL3 PWWP1Protein label chain A · ligand label chain G	native annotation core contactbuffer/additivebuffer component · other component. Deposited geometry is not solution affinity.	Core: 2.9207 Å Pfam: 2.9207 Å	View deposited instance
6IIP · MESPDB:6IIP:LIG:G:MES:101:.	HDGFL3 PWWP1Protein label chain B · ligand label chain G	native annotation core contactbuffer/additivebuffer component · other component. Deposited geometry is not solution affinity.	Core: 2.7066 Å Pfam: 2.7066 Å	View deposited instance

Preparations, identities and controls remain separate

Experimental context

No measured preparation is linked to this deposited identity in the curated snapshot.

Provenance and reproducibility

Sources & downloads

https://www.rcsb.org/ligand/MES

Download complete evidence JSON Curation methods & source receipts

Snapshot 2026-10-26 · phase5-1.0.0 · original measurements, operators, constructs and uncertainty are retained in the exports.