Ligand profile

HC4

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

Bound to: KP13_05275 — Multiple antibiotic resistance protein marR

Via homolog PDB 4rgr UniProt Q7X0D9 Formula C₉H₈O₃
Mol. weight 164.16 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
HC4
PDB
4rgr
UniProt (similar protein)
Q7X0D9
Target protein
KP13_05275

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 164.16 Da
LogP (Crippen) 1.49
H-bond donors 2
H-bond acceptors 2
TPSA 57.53 Ų
Rotatable bonds 2
Aromatic rings 1 / 1
Heavy atoms 12
Fraction sp³ C 0.00
Formula C₉H₈O₃

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 57.5
  • −1 ≤ LogP ≤ 5 1.49
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 164.2
  • LogP ≤ 5 1.49
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 2
Veber's rules Pass
  • Rotatable bonds ≤ 10 2
  • TPSA ≤ 140 Ų 57.5
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1cc(ccc1/C=C/C(=O)O)O
InChI 
InChI=1S/C9H8O3/c10-8-4-1-7(2-5-8)3-6-9(11)12/h1-6,10H,(H,11,12)/b6-3+
InChIKey 
NGSWKAQJJWESNS-ZZXKWVIFSA-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
PF12802

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_05275.

PDB 13

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)