Ligand profile

CKQ

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

Bound to: KP13_00667 — Glycogen phosphorylase

Via homolog PDB 6f3j UniProt P00489 Formula C₂₁H₂₁N₃O₇
Mol. weight 427.41 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
CKQ
PDB
6f3j
UniProt (similar protein)
P00489
Target protein
KP13_00667

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 427.41 Da
LogP (Crippen) 0.35
H-bond donors 6
H-bond acceptors 8
TPSA 169.02 Ų
Rotatable bonds 5
Aromatic rings 3 / 4
Heavy atoms 31
Fraction sp³ C 0.29
Formula C₂₁H₂₁N₃O₇

Drug-likeness

Descriptor-based ADME screening flags from SMILES. These are not experimental toxicity results.

Permeability proxy Check

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 169.0
  • −1 ≤ LogP ≤ 5 0.35
Lipinski's Rule of Five Pass 1 violation
  • MW ≤ 500 Da 427.4
  • LogP ≤ 5 0.35
  • H-bond donors ≤ 5 6
  • H-bond acceptors ≤ 10 8
Veber's rules Fail
  • Rotatable bonds ≤ 10 5
  • TPSA ≤ 140 Ų 169.0
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1cc(ccc1c2ccc(cc2)C(=O)O)c3[nH]c(nn3)[C@H]4[C@@H]([C@H]([C@@H]([C@H](O4)CO)O)O)O
InChI 
InChI=1S/C21H21N3O7/c25-9-14-15(26)16(27)17(28)18(31-14)20-22-19(23-24-20)12-5-1-10(2-6-12)11-3-7-13(8-4-11)21(29)30/h1-8,14-18,25-28H,9H2,(H,29,30)(H,22,23,24)/t14-,15-,16+,17-,18-/m1/s1
InChIKey 
UQZVJUDMJCTDEV-UYTYNIKBSA-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
PF00343

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_00667.

PDB 115

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)