Ligand profile

G9A

Bioactivity hit from ChEMBL on a similar protein.

Bound to: KP13_04549 — NAD-dependent malic enzyme

Via homolog UniProt Q16798 Formula C₅H₆O₄
Mol. weight 130.10 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
G9A
UniProt (similar protein)
Q16798
Target protein
KP13_04549

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 130.10 Da
LogP (Crippen) 0.10
H-bond donors 2
H-bond acceptors 2
TPSA 74.60 Ų
Rotatable bonds 3
Aromatic rings 0 / 0
Heavy atoms 9
Fraction sp³ C 0.20
Formula C₅H₆O₄

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 0.10
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 130.1
  • LogP ≤ 5 0.10
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 2
Veber's rules Pass
  • Rotatable bonds ≤ 10 3
  • TPSA ≤ 140 Ų 74.6
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
C(/C=C/C(=O)O)C(=O)O
InChI 
InChI=1S/C5H6O4/c6-4(7)2-1-3-5(8)9/h1-2H,3H2,(H,6,7)(H,8,9)/b2-1+
InChIKey 
XVOUMQNXTGKGMA-OWOJBTEDSA-N

Provenance

Annotation context from LigQ_2, the internal Target step that collects PDB, ChEMBL, and ZINC ligand evidence.

Method
LigQ nearest_k
Source
ChEMBL
Activity
Active
Curation
pdb_similarity_tanimoto
Binding sites
PF00390

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_04549.

PDB 13

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

Ligand PDB entry

ChEMBL 1

Compounds with measured inhibitory activity on this target (higher pchembl = more potent).

Compound Potency (pchembl)

ZINC 50

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

Compound Similarity (Tanimoto)