Benzothiazinones mediate killing of Corynebacterianeae by blocking decaprenyl phosphate recycling involved in cell wall biosynthesis

Shipra Grover, Luke J Alderwick, Arun K Mishra, Karin Krumbach, Jan Marienhagen, Lothar Eggeling, Apoorva Bhatt, Gurdyal S Besra

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)
182 Downloads (Pure)

Abstract

Benzothiazinones (BTZs) are a new class of sulphur containing heterocyclic compounds which target DprE1, an oxidoreductase involved in the epimerisation of decaprenyl-phosphoribose (DPR) to decaprenyl-phosphoarabinose (DPA) in the Corynebacterineae, such as Corynebacterium glutamicum and Mycobacterium tuberculosis. As a result, BTZ inhibition leads to inhibition of cell wall arabinan biosynthesis. Previous studies have demonstrated the essentiality of dprE1. In contrast, Cg-UbiA a ribosyltransferase, that catalyzes the first step of DPR biosynthesis prior to DprE1, when genetically-disrupted, produced a viable mutant, suggesting that while BTZ biochemically targets DprE1, killing also occurs through chemical synthetic lethality, presumably through the lack of decaprenyl phosphate recycling. To test this hypothesis, a derivative of BTZ, BTZ043 was examined in detail against C. glutamicum and C. glutamicum::ubiA. The wild type strain was sensitive to BTZ043; however C. glutamicum::ubiA was found to be resistant, despite possessing a functional DprE1. When the gene encoding C. glutamicum Z-decaprenyl diphosphate synthase (NCgl2203) was over-expressed in wild type C. glutamicum, resistance to BTZ043 was further increased. This data demonstrates that in presence of BTZ, the bacilli accumulate DPR and fail to recycle decaprenyl phosphate, which results in the depletion of decaprenyl phosphate and ultimately leads to cell death.
Original languageEnglish
Pages (from-to)6177-6187
JournalJournal of Biological Chemistry
Volume289
Issue number9
Early online date20 Jan 2014
DOIs
Publication statusPublished - 28 Feb 2014

Keywords

  • Bacterial Metabolism
  • Carbohydrate Metabolism
  • Cell Wall
  • Drug Resistance
  • Polysaccharide

Fingerprint

Dive into the research topics of 'Benzothiazinones mediate killing of Corynebacterianeae by blocking decaprenyl phosphate recycling involved in cell wall biosynthesis'. Together they form a unique fingerprint.

Cite this