Colicin N and Its Interaction with OmpF
Author Information
Author(s): Baboolal Thomas G., Conroy Matthew J., Gill Katrina, Ridley Helen, Visudtiphole Virak, Bullough Per A., Lakey Jeremy H.
Primary Institution: The Institute for Cell and Molecular Biosciences, Newcastle University
Hypothesis
Colicin N binds to the outer membrane protein OmpF, which serves as both receptor and translocator.
Conclusion
Colicin N binds to the periphery of OmpF, displacing lipopolysaccharide and suggesting a novel translocation mechanism at the protein-lipid interface.
Supporting Evidence
- Colicin N was found to bind outside the OmpF trimer in 2D crystals.
- Binding of colicin N displaces OmpF-bound lipopolysaccharide.
- The first helix of colicin N's pore-forming domain rearranges to bind OmpF.
Takeaway
Colicin N is a protein that can kill bacteria by getting inside them, and it does this by sticking to a specific part of a protein on the bacteria's surface.
Methodology
The study used biochemical and electron microscopy techniques to analyze the binding of colicin N to OmpF.
Digital Object Identifier (DOI)
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