Ligand profile

QCQ

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

Bound to: VK055_2087 — calcineurin-like phosphoesterase family protein

Via homolog PDB 6z9b UniProt P21589 Formula C₁₈H₂₁ClFN₅O₈P₂
Mol. weight 551.79 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
QCQ
PDB
6z9b
UniProt (similar protein)
P21589
Target protein
VK055_2087

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 551.79 Da
LogP (Crippen) 2.03
H-bond donors 5
H-bond acceptors 10
TPSA 189.15 Ų
Rotatable bonds 9
Aromatic rings 3 / 4
Heavy atoms 35
Fraction sp³ C 0.39
Formula C₁₈H₂₁ClFN₅O₈P₂

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 189.1
  • −1 ≤ LogP ≤ 5 2.03
Lipinski's Rule of Five Pass 1 violation
  • MW ≤ 500 Da 551.8
  • LogP ≤ 5 2.03
  • H-bond donors ≤ 5 5
  • H-bond acceptors ≤ 10 10
Veber's rules Fail
  • Rotatable bonds ≤ 10 9
  • TPSA ≤ 140 Ų 189.1
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
c1ccc(cc1)CNc2c3c(nc(n2)Cl)n(cn3)[C@H]4[C@H]([C@@H]([C@H](O4)COP(=O)(CP(=O)(O)O)O)O)F
InChI 
InChI=1S/C18H21ClFN5O8P2/c19-18-23-15(21-6-10-4-2-1-3-5-10)13-16(24-18)25(8-22-13)17-12(20)14(26)11(33-17)7-32-35(30,31)9-34(27,28)29/h1-5,8,11-12,14,17,26H,6-7,9H2,(H,30,31)(H,21,23,24)(H2,27,28,29)/t11-,12+,14-,17-/m1/s1
InChIKey 
PPWDVNAHTXSWKW-DMVWFOPNSA-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
PF00149' 'PF02872

External resources

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

Other ligands for this protein

Quick navigation to other ligands bound to VK055_2087.

PDB 14

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)