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Contribution of a PerR-like regulator to the oxidative-stress response and virulence of Enterococcus faecalis.
- Source :
-
Microbiology (Reading, England) [Microbiology (Reading)] 2005 Dec; Vol. 151 (Pt 12), pp. 3997-4004. - Publication Year :
- 2005
-
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.
- Subjects :
- Bacterial Proteins genetics
Enterococcus faecalis physiology
Molecular Sequence Data
Repressor Proteins genetics
Transcription Factors genetics
Transcription, Genetic
Virulence
Bacterial Proteins physiology
Enterococcus faecalis pathogenicity
Gene Expression Regulation, Bacterial
Oxidative Stress physiology
Repressor Proteins physiology
Transcription Factors physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1350-0872
- Volume :
- 151
- Issue :
- Pt 12
- Database :
- MEDLINE
- Journal :
- Microbiology (Reading, England)
- Publication Type :
- Academic Journal
- Accession number :
- 16339944
- Full Text :
- https://doi.org/10.1099/mic.0.28325-0