Ligand profile

CHEMBL4877839

Bioactivity hit from ChEMBL on a similar protein.

Bound to: KP13_02726 — S-adenosylmethionine synthase

Via homolog UniProt P31153 Formula C₁₈H₂₀N₄O
pchembl 6.58 ~263.0 nM
Mol. weight 308.39 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
CHEMBL4877839
UniProt (similar protein)
P31153
pchembl
6.580 (~263.0 nM)
Target protein
KP13_02726

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 308.39 Da
LogP (Crippen) 2.99
H-bond donors 1
H-bond acceptors 4
TPSA 53.40 Ų
Rotatable bonds 2
Aromatic rings 3 / 4
Heavy atoms 23
Fraction sp³ C 0.33
Formula C₁₈H₂₀N₄O

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 53.4
  • −1 ≤ LogP ≤ 5 2.99
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 308.4
  • LogP ≤ 5 2.99
  • H-bond donors ≤ 5 1
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 2
  • TPSA ≤ 140 Ų 53.4
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
Cc1cc(=O)n2nc(-c3ccccc3)c(N3CCCCC3)c2[nH]1
InChI 
InChI=1S/C18H20N4O/c1-13-12-15(23)22-18(19-13)17(21-10-6-3-7-11-21)16(20-22)14-8-4-2-5-9-14/h2,4-5,8-9,12,19H,3,6-7,10-11H2,1H3
InChIKey 
NRSYURQQRICLTP-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
ChEMBL
Curation
pdb_similarity_tanimoto
Binding sites
PF00438' 'PF02772' 'PF02773

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_02726.

PDB 20

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

Ligand PDB entry

ChEMBL 99

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)