Regulation of rpoS in Borrelia burgdorferi
Author Information
Author(s): Mary N Burtnick, Jennifer S Downey, Paul J Brett, Julie A Boylan, Jonathan G Frye, Timothy R Hoover, Frank C Gherardini
Primary Institution: National Institute of Allergy and Infectious Diseases, National Institutes of Health
Hypothesis
How do multiple signaling pathways regulate the expression of rpoS in Borrelia burgdorferi?
Conclusion
The study reveals that Rrp2 activates rpoS transcription through a σ54-dependent promoter, and that while rpoN is essential for maximal expression, hk2 is not.
Supporting Evidence
- Rrp2 is a σ54-dependent activator that controls rpoS expression.
- RpoN is required for cell density- and temperature-dependent expression of rpoS.
- Rrp2Δ123 can activate transcription from the rpoS promoter in E. coli.
Takeaway
This study shows how a bacteria called Borrelia burgdorferi can change its behavior based on different signals from its environment, helping it survive and cause disease.
Methodology
The study used quantitative reverse transcription polymerase chain reaction (QRT-PCR) and reporter constructs to analyze gene expression.
Limitations
The inability to generate rrp2 mutants suggests that Rrp2 has essential functions beyond activating transcription.
Digital Object Identifier (DOI)
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