Ligand profile

18S

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

Bound to: KP13_00667 — Glycogen phosphorylase

Via homolog PDB 3ms2 UniProt P00489 Formula C₁₅H₂₁N₃O₅S
Mol. weight 355.42 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
18S
PDB
3ms2
UniProt (similar protein)
P00489
Target protein
KP13_00667

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 355.42 Da
LogP (Crippen) -1.41
H-bond donors 6
H-bond acceptors 7
TPSA 126.57 Ų
Rotatable bonds 4
Aromatic rings 1 / 2
Heavy atoms 24
Fraction sp³ C 0.47
Formula C₁₅H₂₁N₃O₅S

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 126.6
  • −1 ≤ LogP ≤ 5 -1.41
Lipinski's Rule of Five Pass 1 violation
  • MW ≤ 500 Da 355.4
  • LogP ≤ 5 -1.41
  • H-bond donors ≤ 5 6
  • H-bond acceptors ≤ 10 7
Veber's rules Pass
  • Rotatable bonds ≤ 10 4
  • TPSA ≤ 140 Ų 126.6
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
Cc1ccc(cc1)/C=N/NC(=S)N[C@H]2[C@@H]([C@H]([C@@H]([C@H](O2)CO)O)O)O
InChI 
InChI=1S/C15H21N3O5S/c1-8-2-4-9(5-3-8)6-16-18-15(24)17-14-13(22)12(21)11(20)10(7-19)23-14/h2-6,10-14,19-22H,7H2,1H3,(H2,17,18,24)/b16-6+/t10-,11-,12+,13-,14-/m1/s1
InChIKey 
DVGNOMWZPXETCK-VSZQLFBDSA-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)