Ligand profile

CHEMBL4067105

Bioactivity hit from ChEMBL on a similar protein.

Bound to: KP13_00958 — Ribonucleoside-diphosphate reductase 1 subunit alpha

Via homolog UniProt P23921 Formula C₁₈H₁₄N₂O₃
Mol. weight 306.32 Da
Permeability High
PAINS Alert

Identifiers

Database identifiers and provenance.

Ligand ID
CHEMBL4067105
UniProt (similar protein)
P23921
Target protein
KP13_00958

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 306.32 Da
LogP (Crippen) 3.01
H-bond donors 3
H-bond acceptors 4
TPSA 81.92 Ų
Rotatable bonds 3
Aromatic rings 3 / 3
Heavy atoms 23
Fraction sp³ C 0.00
Formula C₁₈H₁₄N₂O₃

Drug-likeness

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

Permeability proxy High

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 81.9
  • −1 ≤ LogP ≤ 5 3.01
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 306.3
  • LogP ≤ 5 3.01
  • H-bond donors ≤ 5 3
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 3
  • TPSA ≤ 140 Ų 81.9
PAINS Alert

Matches PAINS filter: hzone_phenol_A(479). May be a frequent false positive in HTS — review carefully.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
O=C(N/N=C/c1c(O)ccc2ccccc12)c1ccccc1O
InChI 
InChI=1S/C18H14N2O3/c21-16-8-4-3-7-14(16)18(23)20-19-11-15-13-6-2-1-5-12(13)9-10-17(15)22/h1-11,21-22H,(H,20,23)/b19-11+
InChIKey 
ZZSJOLDICPVVAV-YBFXNURJSA-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
Curation
pdb_similarity_tanimoto
Binding sites
PF00317' 'PF02867

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_00958.

PDB 16

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

Ligand PDB entry

ChEMBL 8

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)