A Naturally Occurring Mutation in ropB Suppresses SpeB Expression and Reduces M1T1 Group A Streptococcal Systemic Virulence
2008
Mutation in RopB Reduces Virulence in Group A Streptococcus
publication
Evidence: moderate
Author Information
Author(s): Hollands Andrew, Aziz Ramy K., Kansal Rita, Kotb Malak, Nizet Victor, Walker Mark J.
Primary Institution: School of Biological Sciences, University of Wollongong, Wollongong, New South Wales, Australia
Hypothesis
How does a mutation in the ropB gene affect the virulence of group A Streptococcus?
Conclusion
The study found that an intact RopB and efficient SpeB production are necessary for systemic infection with group A Streptococcus.
Supporting Evidence
- An intact ropB was found to be essential for SpeB expression.
- Strains with the mutated ropB allele were less virulent in murine systemic models of infection.
- Microarray analysis found genes of the SpeB operon to be the primary target of RopB regulation.
Takeaway
A tiny change in a gene called ropB makes a type of bacteria less harmful, which helps us understand how these germs cause sickness.
Methodology
The study used allelic exchange mutagenesis to analyze the effects of ropB mutations on virulence in murine models.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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