Ligand profile

B43

Bioactivity hit from ChEMBL on a similar protein.

Bound to: VK055_4925 — apurinic endonuclease family protein

Via homolog UniProt P0A6C1 Formula C₂₃H₂₂N₄O
pchembl 6.05 ~891.3 nM
Mol. weight 370.46 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
B43
UniProt (similar protein)
P0A6C1
pchembl
6.050 (~891.3 nM)
Target protein
VK055_4925

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 370.46 Da
LogP (Crippen) 5.59
H-bond donors 1
H-bond acceptors 5
TPSA 65.96 Ų
Rotatable bonds 4
Aromatic rings 4 / 5
Heavy atoms 28
Fraction sp³ C 0.22
Formula C₂₃H₂₂N₄O

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 66.0
  • −1 ≤ LogP ≤ 5 5.59
Lipinski's Rule of Five Pass 1 violation
  • MW ≤ 500 Da 370.5
  • LogP ≤ 5 5.59
  • H-bond donors ≤ 5 1
  • H-bond acceptors ≤ 10 5
Veber's rules Pass
  • Rotatable bonds ≤ 10 4
  • TPSA ≤ 140 Ų 66.0
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1ccc(cc1)Oc2ccc(cc2)c3cn(c4c3c(ncn4)N)C5CCCC5
InChI 
InChI=1S/C23H22N4O/c24-22-21-20(14-27(17-6-4-5-7-17)23(21)26-15-25-22)16-10-12-19(13-11-16)28-18-8-2-1-3-9-18/h1-3,8-15,17H,4-7H2,(H2,24,25,26)
InChIKey 
FMETVQKSDIOGPX-UHFFFAOYSA-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
Inconclusive
Binding sites
PF01261

External resources

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

Other ligands for this protein

Quick navigation to other ligands bound to VK055_4925.

PDB 1

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

Ligand PDB entry

ChEMBL 63

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)