Ligand profile

CHEMBL4451993

Bioactivity hit from ChEMBL on a similar protein.

Bound to: KP13_01605 — Protease 2

Via homolog UniProt P48147 Formula C₂₁H₂₀N₂O₃
pchembl 8.46 ~3.5 nM
Mol. weight 348.40 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
CHEMBL4451993
UniProt (similar protein)
P48147
pchembl
8.460 (~3.5 nM)
Target protein
KP13_01605

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 348.40 Da
LogP (Crippen) 2.65
H-bond donors 0
H-bond acceptors 3
TPSA 57.69 Ų
Rotatable bonds 4
Aromatic rings 2 / 4
Heavy atoms 26
Fraction sp³ C 0.29
Formula C₂₁H₂₀N₂O₃

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 57.7
  • −1 ≤ LogP ≤ 5 2.65
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 348.4
  • LogP ≤ 5 2.65
  • H-bond donors ≤ 5 0
  • H-bond acceptors ≤ 10 3
Veber's rules Pass
  • Rotatable bonds ≤ 10 4
  • TPSA ≤ 140 Ų 57.7
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
O=C[C@@H]1CCCN1C(=O)c1cccc2c1C(=O)N(Cc1ccccc1)C2
InChI 
InChI=1S/C21H20N2O3/c24-14-17-9-5-11-23(17)20(25)18-10-4-8-16-13-22(21(26)19(16)18)12-15-6-2-1-3-7-15/h1-4,6-8,10,14,17H,5,9,11-13H2/t17-/m0/s1
InChIKey 
XCDRGCRQJSNOSC-KRWDZBQOSA-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
PF00326' 'PF02897

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_01605.

PDB 4

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)