Ligand profile

TDR

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

Bound to: KP13_03293 — Deoxyribodipyrimidine photo-lyase

Via homolog PDB 1iqu UniProt P61497 Formula C₅H₆N₂O₂
Mol. weight 126.11 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
TDR
PDB
1iqu
UniProt (similar protein)
P61497
Target protein
KP13_03293

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 126.11 Da
LogP (Crippen) -0.63
H-bond donors 2
H-bond acceptors 2
TPSA 65.72 Ų
Rotatable bonds 0
Aromatic rings 1 / 1
Heavy atoms 9
Fraction sp³ C 0.20
Formula C₅H₆N₂O₂

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 65.7
  • −1 ≤ LogP ≤ 5 -0.63
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 126.1
  • LogP ≤ 5 -0.63
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 2
Veber's rules Pass
  • Rotatable bonds ≤ 10 0
  • TPSA ≤ 140 Ų 65.7
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
CC1=CNC(=O)NC1=O
InChI 
InChI=1S/C5H6N2O2/c1-3-2-6-5(9)7-4(3)8/h2H,1H3,(H2,6,7,8,9)
InChIKey 
RWQNBRDOKXIBIV-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
PF03441

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_03293.

PDB 2

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)