Engineering another class of anti-tubercular lead: Hit to lead optimization of an intriguing class of gyrase ATPase inhibitors

Eur J Med Chem. 2016 Oct 21:122:216-231. doi: 10.1016/j.ejmech.2016.06.042. Epub 2016 Jun 24.

Abstract

A structure based medium throughput virtual screening campaign of BITS-Pilani in house chemical library to identify novel binders of Mycobacterium tuberculosis gyrase ATPase domain led to the discovery of a quinoline scaffold. Further medicinal chemistry explorations on the right hand core of the early hit, engendered a potent lead demonstrating superior efficacy both in the enzyme and whole cell screening assay. The binding affinity shown at the enzyme level was further corroborated by biophysical characterization techniques. Early pharmacokinetic evaluation of the optimized analogue was encouraging and provides interesting potential for further optimization.

Keywords: DNA gyrase; Differential scanning fluorimetry; Medium throughput virtual screening; Mycobacterium tuberculosis.

MeSH terms

  • Adenosine Triphosphatases / antagonists & inhibitors*
  • Adenosine Triphosphatases / chemistry
  • Antitubercular Agents / chemistry
  • Antitubercular Agents / pharmacology*
  • DNA Gyrase / chemistry
  • DNA Gyrase / metabolism*
  • Drug Discovery*
  • Engineering
  • Microbial Sensitivity Tests
  • Models, Molecular
  • Mycobacterium tuberculosis / drug effects*
  • Mycobacterium tuberculosis / enzymology*
  • Protein Conformation

Substances

  • Antitubercular Agents
  • Adenosine Triphosphatases
  • DNA Gyrase