Ligand profile

UQ2

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

Bound to: KP13_00989 — NADH-quinone oxidoreductase subunit F

Via homolog PDB 7dgq UniProt P25708 Formula C₁₉H₂₆O₄
Mol. weight 318.41 Da
Permeability High
PAINS Alert

Identifiers

Database identifiers and provenance.

Ligand ID
UQ2
PDB
7dgq
UniProt (similar protein)
P25708
Target protein
KP13_00989

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 318.41 Da
LogP (Crippen) 4.04
H-bond donors 0
H-bond acceptors 4
TPSA 52.60 Ų
Rotatable bonds 7
Aromatic rings 0 / 1
Heavy atoms 23
Fraction sp³ C 0.47
Formula C₁₉H₂₆O₄

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 52.6
  • −1 ≤ LogP ≤ 5 4.04
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 318.4
  • LogP ≤ 5 4.04
  • H-bond donors ≤ 5 0
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 7
  • TPSA ≤ 140 Ų 52.6
PAINS Alert

Matches PAINS filter: quinone_A(370). May be a frequent false positive in HTS — review carefully.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
CC1=C(C(=O)C(=C(C1=O)OC)OC)C\C=C(/C)\CCC=C(C)C
InChI 
InChI=1S/C19H26O4/c1-12(2)8-7-9-13(3)10-11-15-14(4)16(20)18(22-5)19(23-6)17(15)21/h8,10H,7,9,11H2,1-6H3/b13-10+
InChIKey 
SQQWBSBBCSFQGC-JLHYYAGUSA-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
PF02271

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_00989.

PDB 19

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)