Salmonella SPI1 Effector SipA Persists after Entry and Cooperates with a SPI2 Effector to Regulate Phagosome Maturation and Intracellular Replication
2007
How Salmonella Uses SipA to Survive Inside Cells
publication
Evidence: high
Author Information
Author(s): Brawn Lyndsey C., Hayward Richard D., Koronakis Vassilis
Primary Institution: University of Cambridge, Department of Pathology
Hypothesis
Does the SPI1 effector SipA continue to function after Salmonella enters host cells?
Conclusion
SipA persists after Salmonella entry and helps regulate the maturation of the phagosome and bacterial replication.
Supporting Evidence
- SipA remains associated with internalized bacteria long after Salmonella entry.
- SipA promotes bacterial replication in both nonphagocytic cells and macrophages.
- SipA cooperates with the SPI2 effector SifA to ensure proper positioning of the Salmonella-containing vacuole.
Takeaway
Salmonella bacteria have a special protein called SipA that helps them grow inside our cells after they get in. It's like a helper that makes sure they stay safe and can multiply.
Methodology
The study involved infecting mammalian cells with Salmonella and observing the behavior of SipA and its effects on bacterial replication and phagosome maturation.
Digital Object Identifier (DOI)
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