The Cytosolic Domain of Fis1 Binds and Reversibly Clusters Lipid Vesicles
2011
Fis1 Protein Clusters Lipid Vesicles and Affects Membrane Structure
publication
Evidence: moderate
Author Information
Author(s): Robert C. Wells, R. Blake Hill
Primary Institution: Johns Hopkins University
Hypothesis
Does the cytosolic domain of Fis1 promote changes in membrane structure?
Conclusion
The cytosolic domain of Fis1 binds lipid vesicles and induces reversible clustering without causing fusion.
Supporting Evidence
- The cytosolic domain of Fis1 binds lipid vesicles in a pH-dependent manner.
- Binding of Fis1 to membranes is reversible and does not lead to membrane fusion.
- Fis1-induced vesicle clustering is rapid and can be reversed by changing the pH.
Takeaway
Fis1 is a protein that can stick to and group together tiny bubbles of fat called lipid vesicles, and it can let go of them when needed.
Methodology
The study involved protein purification, vesicle sedimentation assays, circular dichroism, and fluorescence spectroscopy to analyze the interactions between Fis1 and lipid vesicles.
Limitations
The study primarily focuses on in vitro conditions, which may not fully replicate in vivo environments.
Digital Object Identifier (DOI)
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