Ligand profile

FR3

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

Bound to: KP13_04428 — Adenosine deaminase

Via homolog PDB 1ndy UniProt P56658 Formula C₁₈H₁₉N₃O₂
Mol. weight 309.37 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
FR3
PDB
1ndy
UniProt (similar protein)
P56658
Target protein
KP13_04428

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 309.37 Da
LogP (Crippen) 2.30
H-bond donors 2
H-bond acceptors 4
TPSA 81.14 Ų
Rotatable bonds 6
Aromatic rings 3 / 3
Heavy atoms 23
Fraction sp³ C 0.22
Formula C₁₈H₁₉N₃O₂

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 81.1
  • −1 ≤ LogP ≤ 5 2.30
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 309.4
  • LogP ≤ 5 2.30
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 4
Veber's rules Pass
  • Rotatable bonds ≤ 10 6
  • TPSA ≤ 140 Ų 81.1
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1ccc2c(c1)cccc2CC[C@H](CO)n3cc(nc3)C(=O)N
InChI 
InChI=1S/C18H19N3O2/c19-18(23)17-10-21(12-20-17)15(11-22)9-8-14-6-3-5-13-4-1-2-7-16(13)14/h1-7,10,12,15,22H,8-9,11H2,(H2,19,23)/t15-/m1/s1
InChIKey 
URGFTPMACWKJKU-OAHLLOKOSA-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
PF00962

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_04428.

PDB 11

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

Ligand PDB entry

ChEMBL 100

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)