Ligand profile

HFK

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

Bound to: KP13_02993 — Galactokinase

Via homolog PDB 6q90 UniProt P51570 Formula C₂₀H₂₂N₄O₂
Mol. weight 350.42 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
HFK
PDB
6q90
UniProt (similar protein)
P51570
Target protein
KP13_02993

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 350.42 Da
LogP (Crippen) 3.91
H-bond donors 2
H-bond acceptors 6
TPSA 79.52 Ų
Rotatable bonds 1
Aromatic rings 2 / 5
Heavy atoms 26
Fraction sp³ C 0.45
Formula C₂₀H₂₂N₄O₂

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 79.5
  • −1 ≤ LogP ≤ 5 3.91
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 350.4
  • LogP ≤ 5 3.91
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 6
Veber's rules Pass
  • Rotatable bonds ≤ 10 1
  • TPSA ≤ 140 Ų 79.5
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1ccc2c(c1)nc(o2)NC3=NC4(CCCCC4)C5=C(N3)CCCC5=O
InChI 
InChI=1S/C20H22N4O2/c25-15-9-6-8-14-17(15)20(11-4-1-5-12-20)24-18(21-14)23-19-22-13-7-2-3-10-16(13)26-19/h2-3,7,10H,1,4-6,8-9,11-12H2,(H2,21,22,23,24)
InChIKey 
AZBGHUMVHJKFOO-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
PDB
Binding sites
PF00288

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_02993.

PDB 3

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

Ligand PDB entry

ChEMBL 10

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)