A Novel Linear Plasmid in Salmonella Typhi
Author Information
Author(s): Stephen Baker, Jonathan Hardy, Kenneth E. Sanderson, Michael Quail, Ian Goodhead, Robert A. Kingsley, Julian Parkhill, Gordon Dougan
Primary Institution: The Wellcome Trust Sanger Institute
Hypothesis
The study investigates the presence and characteristics of a novel linear plasmid in Salmonella Typhi that mediates flagellar variation.
Conclusion
The identification of the linear plasmid pBSSB1 in Salmonella Typhi suggests a new mechanism for flagellar variation in this pathogen.
Supporting Evidence
- The linear plasmid pBSSB1 is the first non-bacteriophage related linear plasmid described in Enterobacteriaceae.
- The plasmid is capable of autonomous replication in Escherichia coli.
- The study identified 33 coding sequences on the plasmid.
Takeaway
Some Salmonella Typhi bacteria can have special flagella that help them swim better, and scientists found that the genes for these flagella are on a new type of DNA called a linear plasmid.
Methodology
The study involved isolating and sequencing the plasmid DNA from Salmonella Typhi strains and analyzing its genetic content.
Limitations
The study does not determine the impact of the linear plasmid on the pathogenicity of Salmonella Typhi strains.
Participant Demographics
The strains were isolated from Indonesia.
Digital Object Identifier (DOI)
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