Ligand profile

CHEMBL4438807

Bioactivity hit from ChEMBL on a similar protein.

Bound to: KP13_02784 — DNA topoisomerase 4 subunit A

Via homolog UniProt P20831 Formula C₂₆H₂₆FN₃O₃
pchembl 6.10 ~794.3 nM
Mol. weight 447.51 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
CHEMBL4438807
UniProt (similar protein)
P20831
pchembl
6.100 (~794.3 nM)
Target protein
KP13_02784

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 447.51 Da
LogP (Crippen) 3.60
H-bond donors 1
H-bond acceptors 6
TPSA 69.81 Ų
Rotatable bonds 6
Aromatic rings 4 / 5
Heavy atoms 33
Fraction sp³ C 0.31
Formula C₂₆H₂₆FN₃O₃

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 69.8
  • −1 ≤ LogP ≤ 5 3.60
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 447.5
  • LogP ≤ 5 3.60
  • H-bond donors ≤ 5 1
  • H-bond acceptors ≤ 10 6
Veber's rules Pass
  • Rotatable bonds ≤ 10 6
  • TPSA ≤ 140 Ų 69.8
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
O=c1cc(CC(O)CCN2CCN(c3nccc4ccc(F)cc34)CC2)c2ccccc2o1
InChI 
InChI=1S/C26H26FN3O3/c27-20-6-5-18-7-9-28-26(23(18)17-20)30-13-11-29(12-14-30)10-8-21(31)15-19-16-25(32)33-24-4-2-1-3-22(19)24/h1-7,9,16-17,21,31H,8,10-15H2
InChIKey 
MELNHVXWRBLZRI-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
PF00521

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_02784.

PDB 23

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

Ligand PDB entry

ChEMBL 14

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)