Ligand profile

HQK

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

Bound to: KP13_00988 — NADH-quinone oxidoreductase subunit G

Via homolog PDB 6q8x UniProt Q56223 Formula C₁₉H₂₅ClN₂OS
Mol. weight 364.94 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
HQK
PDB
6q8x
UniProt (similar protein)
Q56223
Target protein
KP13_00988

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 364.94 Da
LogP (Crippen) 5.24
H-bond donors 0
H-bond acceptors 4
TPSA 34.89 Ų
Rotatable bonds 3
Aromatic rings 2 / 2
Heavy atoms 24
Fraction sp³ C 0.47
Formula C₁₉H₂₅ClN₂OS

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 34.9
  • −1 ≤ LogP ≤ 5 5.24
Lipinski's Rule of Five Pass 1 violation
  • MW ≤ 500 Da 364.9
  • LogP ≤ 5 5.24
  • H-bond donors ≤ 5 0
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 3
  • TPSA ≤ 140 Ų 34.9
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
CC(C)(C)c1ccc(cc1)CSC2=C(C(=O)N(N=C2)C(C)(C)C)Cl
InChI 
InChI=1S/C19H25ClN2OS/c1-18(2,3)14-9-7-13(8-10-14)12-24-15-11-21-22(19(4,5)6)17(23)16(15)20/h7-11H,12H2,1-6H3
InChIKey 
DWFZBUWUXWZWKD-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
PF00346' 'PF01058

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_00988.

PDB 22

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

Ligand PDB entry

ZINC 50

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

Compound Similarity (Tanimoto)