Ligand profile

K0J

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

Bound to: KP13_09841 — ADP compounds hydrolase nudE

Via homolog PDB 5qjc UniProt Q9UKK9 Formula C₅H₈N₄O
Mol. weight 140.15 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
K0J
PDB
5qjc
UniProt (similar protein)
Q9UKK9
Target protein
KP13_09841

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 140.15 Da
LogP (Crippen) -0.45
H-bond donors 2
H-bond acceptors 3
TPSA 70.67 Ų
Rotatable bonds 2
Aromatic rings 1 / 1
Heavy atoms 10
Fraction sp³ C 0.40
Formula C₅H₈N₄O

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 70.7
  • −1 ≤ LogP ≤ 5 -0.45
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 140.1
  • LogP ≤ 5 -0.45
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 3
Veber's rules Pass
  • Rotatable bonds ≤ 10 2
  • TPSA ≤ 140 Ų 70.7
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
CCNC(=O)c1c[nH]nn1
InChI 
InChI=1S/C5H8N4O/c1-2-6-5(10)4-3-7-9-8-4/h3H,2H2,1H3,(H,6,10)(H,7,8,9)
InChIKey 
VTJBQJOBKLNCDW-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
PF00293

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_09841.

PDB 53

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

Ligand PDB entry

ChEMBL 5

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)