Ligand profile

PHT

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

Bound to: KP13_03261 — Quinolinate synthase A

Via homolog PDB 6g74 UniProt Q9X1X7 Formula C₈H₆O₄
Mol. weight 166.13 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
PHT
PDB
6g74
UniProt (similar protein)
Q9X1X7
Target protein
KP13_03261

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 166.13 Da
LogP (Crippen) 1.08
H-bond donors 2
H-bond acceptors 2
TPSA 74.60 Ų
Rotatable bonds 2
Aromatic rings 1 / 1
Heavy atoms 12
Fraction sp³ C 0.00
Formula C₈H₆O₄

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 74.6
  • −1 ≤ LogP ≤ 5 1.08
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 166.1
  • LogP ≤ 5 1.08
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 2
Veber's rules Pass
  • Rotatable bonds ≤ 10 2
  • TPSA ≤ 140 Ų 74.6
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1ccc(c(c1)C(=O)O)C(=O)O
InChI 
InChI=1S/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12)
InChIKey 
XNGIFLGASWRNHJ-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
PF02445

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_03261.

PDB 21

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)