Identification and characterization of aspartyl-tRNA synthetase inhibitors against Mycobacterium tuberculosis by an integrated whole-cell target-based approach

Research output: Contribution to journalArticle

Authors

  • Esther Perez-Herran
  • Beatriz Rodriguez
  • Bogdan M Duma
  • Monica Cacho-Izquierdo
  • Alfonso Mendoza-Losana
  • Joel Lelievre
  • David Barros Aguirre
  • Lluis Ballell

Colleges, School and Institutes

External organisations

  • Diseases of the Developing World, GlaxoSmithKline, Severo Ochoa 2, 28760, Tres Cantos, Madrid, Spain.

Abstract

Mycobacterium tuberculosis, the causative agent of tuberculosis, has surpassed HIV as the leading cause of death due to an infectious disease worldwide, being responsible for more than 1.5 million deaths in low-income countries. In response to a pandemic threat by drug resistant strains, the tuberculosis research community is searching for new chemical entities with novel mechanisms of action to avoid drug resistance and shorten treatment regimens using combinatorial chemotherapy. Herein, we have identified several novel chemical scaffolds, GSK97C (spiro-oxazolidin-2-one), GSK93A (2-amino-1,3-thiazole, GSK85A and GSK92A (enamides), which target M. tuberculosis aspartyl-tRNA synthetase (Mt-AspRS), an essential component of the protein synthesis machinery of tuberculosis, using a whole-cell target-based screening strategy against a genetically modified Mycobacterium bovis BCG strain. We also provide further evidence of protein inhibition and inhibitor profiling through a classical aminoacylation reaction and a tRNA-independent assay, respectively. Altogether, our results have identified a number of hit new molecules with novel mechanism of action for further development through medicinal chemistry as hits and leads.

Details

Original languageEnglish
Article number12664
Number of pages9
JournalScientific Reports
Volume8
Publication statusPublished - 23 Aug 2018