Ligand profile

QLB

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

Bound to: KP13_02140 — Outer membrane pore protein E

Via homolog PDB 6zhp UniProt P02931 Formula C₁₄H₃₀O₄
Mol. weight 262.39 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
QLB
PDB
6zhp
UniProt (similar protein)
P02931
Target protein
KP13_02140

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 262.39 Da
LogP (Crippen) 2.39
H-bond donors 1
H-bond acceptors 4
TPSA 47.92 Ų
Rotatable bonds 15
Aromatic rings 0 / 0
Heavy atoms 18
Fraction sp³ C 1.00
Formula C₁₄H₃₀O₄

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 47.9
  • −1 ≤ LogP ≤ 5 2.39
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 262.4
  • LogP ≤ 5 2.39
  • H-bond donors ≤ 5 1
  • H-bond acceptors ≤ 10 4
Veber's rules Fail
  • Rotatable bonds ≤ 10 15
  • TPSA ≤ 140 Ų 47.9
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
CCCCCCCCOCCOCCOCCO
InChI 
InChI=1S/C14H30O4/c1-2-3-4-5-6-7-9-16-11-13-18-14-12-17-10-8-15/h15H,2-14H2,1H3
InChIKey 
XIVLVYLYOMHUGB-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
PF00267

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_02140.

PDB 14

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)