Ligand profile

CHEMBL1877709

Bioactivity hit from ChEMBL on a similar protein.

Bound to: KP13_31612 — Peptide methionine sulfoxide reductase msrA

Via homolog UniProt P54149 Formula C₂₁H₁₄N₂O₅S₂
Mol. weight 438.49 Da
Permeability Check
PAINS Alert

Identifiers

Database identifiers and provenance.

Ligand ID
CHEMBL1877709
UniProt (similar protein)
P54149
Target protein
KP13_31612

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 438.49 Da
LogP (Crippen) 3.82
H-bond donors 2
H-bond acceptors 6
TPSA 112.90 Ų
Rotatable bonds 5
Aromatic rings 3 / 4
Heavy atoms 30
Fraction sp³ C 0.00
Formula C₂₁H₁₄N₂O₅S₂

Drug-likeness

Descriptor-based ADME screening flags from SMILES. These are not experimental toxicity results.

Permeability proxy Check

Estimated from TPSA and LogP only: TPSA ≤ 90 Ų and −1 ≤ LogP ≤ 5 are treated as a favorable small-molecule permeability screen.

  • TPSA ≤ 90 Ų 112.9
  • −1 ≤ LogP ≤ 5 3.82
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 438.5
  • LogP ≤ 5 3.82
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 6
Veber's rules Pass
  • Rotatable bonds ≤ 10 5
  • TPSA ≤ 140 Ų 112.9
PAINS Alert

Matches PAINS filter: quinone_A(370). May be a frequent false positive in HTS — review carefully.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
O=C(O)c1ccc(NC2=C/C(=N/S(=O)(=O)c3cccs3)c3ccccc3C2=O)cc1
InChI 
InChI=1S/C21H14N2O5S2/c24-20-16-5-2-1-4-15(16)17(23-30(27,28)19-6-3-11-29-19)12-18(20)22-14-9-7-13(8-10-14)21(25)26/h1-12,22H,(H,25,26)/b23-17-
InChIKey 
HMKDSTGRMDFIOZ-QJOMJCCJSA-N

Provenance

Annotation context from LigQ_2, the internal Target step that collects PDB, ChEMBL, and ZINC ligand evidence.

Method
LigQ nearest_k
Source
ChEMBL
Activity
active
Binding sites
PF01625

External resources

Open this ligand in third-party databases and cheminformatics tools.

Other ligands for this protein

Quick navigation to other ligands bound to KP13_31612.

PDB 6

Ligands co-crystallized with this protein (structural evidence).

Ligand PDB entry

ChEMBL 5

Compounds with measured inhibitory activity on this target (higher pchembl = more potent).

Compound Potency (pchembl)

ZINC 50

Virtual screening candidates selected by structural similarity to known actives (Tanimoto ≥ 0.5).

Compound Similarity (Tanimoto)