Ligand profile

ZINC100318659

Virtual-screening candidate from ZINC.

Bound to: KP13_03545 — Cysteine synthase B

Via homolog UniProt P9WP55 Formula C₂₃H₂₀N₂O₅S
Tanimoto 0.84
Mol. weight 436.49 Da
Permeability High
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
ZINC100318659
UniProt (similar protein)
P9WP55
Tanimoto
0.844
Target protein
KP13_03545

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 436.49 Da
LogP (Crippen) 4.03
H-bond donors 1
H-bond acceptors 6
TPSA 88.43 Ų
Rotatable bonds 7
Aromatic rings 2 / 3
Heavy atoms 31
Fraction sp³ C 0.17
Formula C₂₃H₂₀N₂O₅S

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 88.4
  • −1 ≤ LogP ≤ 5 4.03
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 436.5
  • LogP ≤ 5 4.03
  • H-bond donors ≤ 5 1
  • H-bond acceptors ≤ 10 6
Veber's rules Pass
  • Rotatable bonds ≤ 10 7
  • TPSA ≤ 140 Ų 88.4
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
C#CCOc1ccc(/C=C2\S/C(=N/c3cccc(C(=O)O)c3)N(CC)C2=O)cc1OC
InChI 
InChI=1S/C23H20N2O5S/c1-4-11-30-18-10-9-15(12-19(18)29-3)13-20-21(26)25(5-2)23(31-20)24-17-8-6-7-16(14-17)22(27)28/h1,6-10,12-14H,5,11H2,2-3H3,(H,27,28)/b20-13-,24-23+
InChIKey 
IATGXSHXTKPYBT-RLYGRLLTSA-N

Provenance

Annotation context from LigQ_2, the internal Target step that collects PDB, ChEMBL, and ZINC ligand evidence.

Method
LigQ nearest_k
Query
CHEMBL2418505
Homolog
P9WP55

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_03545.

PDB 8

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

Ligand PDB entry

ChEMBL 15

Compounds with measured inhibitory activity on this target (higher pchembl = more potent).

Compound Potency (pchembl)

ZINC 49

Virtual screening candidates selected by structural similarity to known actives (Tanimoto ≥ 0.5).

Compound Similarity (Tanimoto)