Ligand profile

FQW

Ligand co-crystallized with a similar protein (Protein Data Bank).

Bound to: VK055_0984 — hypothetical protein

Via homolog PDB 4cmk UniProt O76290 Formula C₂₀H₁₈N₄O
Mol. weight 330.39 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
FQW
PDB
4cmk
UniProt (similar protein)
O76290
Target protein
VK055_0984

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 330.39 Da
LogP (Crippen) 3.29
H-bond donors 3
H-bond acceptors 3
TPSA 87.56 Ų
Rotatable bonds 4
Aromatic rings 4 / 4
Heavy atoms 25
Fraction sp³ C 0.10
Formula C₂₀H₁₈N₄O

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 87.6
  • −1 ≤ LogP ≤ 5 3.29
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 330.4
  • LogP ≤ 5 3.29
  • H-bond donors ≤ 5 3
  • H-bond acceptors ≤ 10 3
Veber's rules Pass
  • Rotatable bonds ≤ 10 4
  • TPSA ≤ 140 Ų 87.6
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1ccc(cc1)CCc2c3c([nH]c2c4ccccc4)N=C(NC3=O)N
InChI 
InChI=1S/C20H18N4O/c21-20-23-18-16(19(25)24-20)15(12-11-13-7-3-1-4-8-13)17(22-18)14-9-5-2-6-10-14/h1-10H,11-12H2,(H4,21,22,23,24,25)
InChIKey 
YBOPRCBPMVVKCJ-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
PDB
Binding sites
PF13561

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_0984.

PDB 92

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

Ligand PDB entry

ChEMBL 35

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)