Skip to Main content Skip to Navigation
Journal articles

Contribution of a PerR-like regulator to the oxidative-stress response and virulence of Enterococcus faecalis

Abstract : PerR is one of the most important transcriptional regulators involved in the oxidative-stress response in Bacillus subtilis. Here, the homologous gene in Enterococcus faecalis, ranked among the leading causes of nosocomial infection, was characterized and analysed. Phenotype analysis showed that the perR mutant was significantly more resistant to H2O2 challenge (P<0·05). Expression of eight genes with potential roles in the oxidative-stress response was determined in the wild-type and perR-mutant strains by real-time quantitative PCR. Surprisingly, low quantitative differences in the transcriptional activity of these genes in the mutant versus wild-type were observed. Likewise, this locus was not involved in survival within murine macrophages, but in the mouse peritonitis model, the perR mutant appeared less lethal than the JH2-2 wild-type strain. The combined results show that PerR affects E. faecalis virulence and that its implication in the transcriptional regulation in this bacterium deviates from the B. subtilis model.
Complete list of metadatas

Cited literature [40 references]  Display  Hide  Download

https://hal-normandie-univ.archives-ouvertes.fr/hal-02181961
Contributor : Axel Hartke <>
Submitted on : Monday, June 1, 2020 - 1:20:12 AM
Last modification on : Wednesday, June 10, 2020 - 12:36:38 PM
Long-term archiving on: : Thursday, September 24, 2020 - 7:35:57 PM

File

12853_20091118031408469_1.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Nicolas Verneuil, Alain Rincé, Maurizio Sanguinetti, Brunella Posteraro, Giovanni Fadda, et al.. Contribution of a PerR-like regulator to the oxidative-stress response and virulence of Enterococcus faecalis. Microbiology, Microbiology Society, 2005, 151 (12), pp.3997-4004. ⟨10.1099/mic.0.28325-0⟩. ⟨hal-02181961⟩

Share

Metrics

Record views

81

Files downloads

40