Ligand profile

9KQ

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

Bound to: KP13_04919 — 3-oxoacyl-[acyl-carrier-protein] reductase

Via homolog PDB 4bnu UniProt O54438 Formula C₁₆H₁₁N₅
Mol. weight 273.30 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
9KQ
PDB
4bnu
UniProt (similar protein)
O54438
Target protein
KP13_04919

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 273.30 Da
LogP (Crippen) 2.88
H-bond donors 0
H-bond acceptors 5
TPSA 56.49 Ų
Rotatable bonds 2
Aromatic rings 4 / 4
Heavy atoms 21
Fraction sp³ C 0.00
Formula C₁₆H₁₁N₅

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 56.5
  • −1 ≤ LogP ≤ 5 2.88
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 273.3
  • LogP ≤ 5 2.88
  • H-bond donors ≤ 5 0
  • H-bond acceptors ≤ 10 5
Veber's rules Pass
  • Rotatable bonds ≤ 10 2
  • TPSA ≤ 140 Ų 56.5
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1ccc(cc1)c2nc3ccccc3c(n2)n4cnnc4
InChI 
InChI=1S/C16H11N5/c1-2-6-12(7-3-1)15-19-14-9-5-4-8-13(14)16(20-15)21-10-17-18-11-21/h1-11H
InChIKey 
PNPWQEYBCDBCSQ-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 KP13_04919.

PDB 17

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)