Ligand profile

1CS

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

Bound to: VK055_0407 — acetolactate synthase, catabolic

Via homolog PDB 1t9b UniProt P07342 Formula C₁₂H₁₂ClN₅O₄S
Mol. weight 357.78 Da
Permeability Check
PAINS Clean

Identifiers

Database identifiers and provenance.

Ligand ID
1CS
PDB
1t9b
UniProt (similar protein)
P07342
Target protein
VK055_0407

Structure

2D representation rendered from SMILES.

Physicochemical properties

Computed with RDKit from SMILES.

Molecular weight 357.78 Da
LogP (Crippen) 1.35
H-bond donors 2
H-bond acceptors 7
TPSA 123.17 Ų
Rotatable bonds 4
Aromatic rings 2 / 2
Heavy atoms 23
Fraction sp³ C 0.17
Formula C₁₂H₁₂ClN₅O₄S

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 123.2
  • −1 ≤ LogP ≤ 5 1.35
Lipinski's Rule of Five Pass 0 violations
  • MW ≤ 500 Da 357.8
  • LogP ≤ 5 1.35
  • H-bond donors ≤ 5 2
  • H-bond acceptors ≤ 10 7
Veber's rules Pass
  • Rotatable bonds ≤ 10 4
  • TPSA ≤ 140 Ų 123.2
PAINS Clean

No PAINS structural alerts detected.

Chemical representations

Canonical representations for cheminformatics workflows.

SMILES 
Cc1nc(nc(n1)OC)NC(=O)NS(=O)(=O)c2ccccc2Cl
InChI 
InChI=1S/C12H12ClN5O4S/c1-7-14-10(17-12(15-7)22-2)16-11(19)18-23(20,21)9-6-4-3-5-8(9)13/h3-6H,1-2H3,(H2,14,15,16,17,18,19)
InChIKey 
VJYIFXVZLXQVHO-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
PF00205' 'PF02775' 'PF02776

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_0407.

PDB 38

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

Ligand PDB entry

ChEMBL 37

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)