Ligand profile

AZA

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

Bound to: KP13_02055 — Queuine tRNA-ribosyltransferase

Via homolog PDB 5utj UniProt P28720 Formula C₄H₃N₅O₂
Mol. weight 153.10 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
AZA
PDB
5utj
UniProt (similar protein)
P28720
Target protein
KP13_02055

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 153.10 Da
LogP (Crippen) -1.67
H-bond donors 3
H-bond acceptors 4
TPSA 107.29 Ų
Rotatable bonds 0
Aromatic rings 2 / 2
Heavy atoms 11
Fraction sp³ C 0.00
Formula C₄H₃N₅O₂

Drug-likeness

Descriptor-based ADME screening flags from SMILES. These are not experimental toxicity results.

Permeability proxy Check

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 107.3
  • −1 ≤ LogP ≤ 5 -1.67
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 153.1
  • LogP ≤ 5 -1.67
  • H-bond donors ≤ 5 3
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 0
  • TPSA ≤ 140 Ų 107.3
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c12c([nH]nn1)NC(=O)NC2=O
InChI 
InChI=1S/C4H3N5O2/c10-3-1-2(8-9-7-1)5-4(11)6-3/h(H3,5,6,7,8,9,10,11)
InChIKey 
KVGVQTOQSNJTJI-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
PF01702

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_02055.

PDB 60

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)