Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 50, Issue 1, Pages 336-343Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.50.1.336-343.2006
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Funding
- NIAID NIH HHS [R03 AI44999-01, R01 AI40481-01A1, R01 AI040481] Funding Source: Medline
- NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES [R01AI040481, R03AI044999] Funding Source: NIH RePORTER
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The VraS/VraR two-component system (VraSR) regulates transcriptional induction of penicillin-binding protein 2 (encoded by pbp2) by vancomycin in Staphylococcus aureus. We have now defined the vraSR operon and determined that its induction by beta-lactams as well as by vancomycin is autoregulated. Induction of the pbp2 and vraSR operons by beta-lactams and related compounds within 1 hour after exposure to the antimicrobials was dependent on vraS. However, when a disk diffusion assay that can detect induction of genes over an extended time period was used, induction of the pbp2 operon was mediated by some beta-lactams, including oxacillin; this induction was independent of vraS.
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