Dataset Information

The mevalonate auxotrophic mutant of Staphylococcus aureus can adapt to mevalonate depletion.

ABSTRACT: In this study, we attempted to adopt the auxotrophic mevalonate synthase mutant (?mvaS mutant) of Staphylococcus aureus to study whether a nongrowing but viable cell population is tolerant to bactericidal antibiotics. The mevalonate-depleted nongrowing ?mvaS mutant was found tolerant to antibiotics. Surprisingly, after prolonged cultivation, we obtained stable ?mvaS variants that were able to grow without mevalonate, which suggested unknown mechanisms for compensating undecaprenyl pyrophosphate production without mevalonate in S. aureus.

SUBMITTER: Yu W

PROVIDER: S-EPMC3811321 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

The mevalonate auxotrophic mutant of Staphylococcus aureus can adapt to mevalonate depletion.

Yu Wenqi W Leibig Martina M Schäfer Tina T Bertram Ralph R Ohlsen Knut K Götz Friedrich F

Antimicrobial agents and chemotherapy 20130819 11

In this study, we attempted to adopt the auxotrophic mevalonate synthase mutant (ΔmvaS mutant) of Staphylococcus aureus to study whether a nongrowing but viable cell population is tolerant to bactericidal antibiotics. The mevalonate-depleted nongrowing ΔmvaS mutant was found tolerant to antibiotics. Surprisingly, after prolonged cultivation, we obtained stable ΔmvaS variants that were able to grow without mevalonate, which suggested unknown mechanisms for compensating undecaprenyl pyrophosphate ...[more]

PMID: 23959312

Similar Datasets

Project description:Isoprenoids are a class of ubiquitous organic molecules synthesized from the five-carbon starter unit isopentenyl pyrophosphate (IPP). Comprising more than 30,000 known natural products, isoprenoids serve various important biological functions in many organisms. In bacteria, undecaprenyl pyrophosphate is absolutely required for the formation of cell wall peptidoglycan and other cell surface structures, while ubiquinones and menaquinones, both containing an essential prenyl moiety, are key electron carriers in respiratory energy generation. There is scant knowledge on the nature and regulation of bacterial isoprenoid pathways. In order to explore the cellular responses to perturbations in the mevalonate pathway, responsible for producing the isoprenoid precursor IPP in many Gram-positive bacteria and eukaryotes, we constructed three strains of Staphylococcus aureus in which each of the mevalonate pathway genes is regulated by an IPTG inducible promoter. We used DNA microarrays to profile the transcriptional effects of downregulating the components of the mevalonate pathway in S. aureus and demonstrate that decreased expression of the mevalonate pathway leads to widespread downregulation of primary metabolism genes, an upregulation in virulence factors and cell wall biosynthetic determinants, and surprisingly little compensatory expression in other isoprenoid biosynthetic genes. We subsequently correlate these transcriptional changes with downstream metabolic consequences. We used microarrays to profile the transcriptional changes incurred when downregulating mvaS, mvaA, or mvaK in S. aureus. Keywords: stress response S. aureus mutants were generated in which mvaS, mvaA, or mvaK were placed under control of the IPTG-inducible Pspac promoter. These mutants, as well as wildtype RN4220 S. aureus, were grown with or without 1 mM IPTG, harvested in exponential phase, and their total RNA was extracted and hybridized to Affymetrix GeneChips. Experiments were done in triplicate.

Dataset Information

The mevalonate auxotrophic mutant of Staphylococcus aureus can adapt to mevalonate depletion.

Publications

The mevalonate auxotrophic mutant of Staphylococcus aureus can adapt to mevalonate depletion.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets