Ligand profile

KQS

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

Bound to: O00116

Via homolog PDB 5adz UniProt P97275 Formula C₁₈H₁₈FN₃O₂
Mol. weight 327.36 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
KQS
PDB
5adz
UniProt (similar protein)
P97275
Target protein
O00116

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 327.36 Da
LogP (Crippen) 2.81
H-bond donors 3
H-bond acceptors 2
TPSA 77.75 Ų
Rotatable bonds 5
Aromatic rings 3 / 3
Heavy atoms 24
Fraction sp³ C 0.22
Formula C₁₈H₁₈FN₃O₂

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 77.8
  • −1 ≤ LogP ≤ 5 2.81
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 327.4
  • LogP ≤ 5 2.81
  • H-bond donors ≤ 5 3
  • H-bond acceptors ≤ 10 2
Veber's rules Pass
  • Rotatable bonds ≤ 10 5
  • TPSA ≤ 140 Ų 77.8
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
C[C@@H](CC(=O)NCc1ccc2c(c1)NC(=O)N2)c3ccccc3F
InChI 
InChI=1S/C18H18FN3O2/c1-11(13-4-2-3-5-14(13)19)8-17(23)20-10-12-6-7-15-16(9-12)22-18(24)21-15/h2-7,9,11H,8,10H2,1H3,(H,20,23)(H2,21,22,24)/t11-/m0/s1
InChIKey 
JYQMTEASQYBLAO-NSHDSACASA-N

Provenance

Annotation context from LigQ_2, the internal Target step that collects PDB, ChEMBL, and ZINC ligand evidence.

Method
LigQ sequence
Source
PDB
Binding sites
PF01565' 'PF02913

External resources

Open this ligand in third-party databases and cheminformatics tools.

Other ligands for this protein

Quick navigation to other ligands bound to O00116.

PDB 62

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

Ligand PDB entry

ChEMBL 53

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)