Ligand profile

4G4

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

Bound to: KP13_02423 — tRNA (guanine-N(1)-)-methyltransferase

Via homolog PDB 4yq7 UniProt P43912 Formula C₁₅H₁₈N₄O
Mol. weight 270.34 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
4G4
PDB
4yq7
UniProt (similar protein)
P43912
Target protein
KP13_02423

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 270.34 Da
LogP (Crippen) 1.86
H-bond donors 2
H-bond acceptors 4
TPSA 71.25 Ų
Rotatable bonds 5
Aromatic rings 2 / 2
Heavy atoms 20
Fraction sp³ C 0.20
Formula C₁₅H₁₈N₄O

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 71.2
  • −1 ≤ LogP ≤ 5 1.86
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 270.3
  • LogP ≤ 5 1.86
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 5
  • TPSA ≤ 140 Ų 71.2
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
CN(C)c1ccccc1CNc2ccc(cn2)C(=O)N
InChI 
InChI=1S/C15H18N4O/c1-19(2)13-6-4-3-5-11(13)9-17-14-8-7-12(10-18-14)15(16)20/h3-8,10H,9H2,1-2H3,(H2,16,20)(H,17,18)
InChIKey 
OQZMUCDXSPWFIT-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
PF01746

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_02423.

PDB 88

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

Ligand PDB entry

ChEMBL 38

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)