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Spot Variation Fluorescence Correlation Spectroscopy for Analysis of Molecular Diffusion at the Plasma Membrane of Living Cells
Published on: November 12, 2020
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The plasma membrane as an adaptable fluid mosaic.
Sarah L Veatch1, Nat Rogers1, Adam Decker1
1Program in Biophysics, University of Michigan, Ann Arbor, MI, USA.
Biochimica Et Biophysica Acta. Biomembranes
|December 29, 2022
Summary
The fluid mosaic model is updated to describe adaptable fluid membranes. These membranes can change their local composition based on external forces, suggesting new biological functions.
Area of Science:
- Cell biology
- Biophysics
- Membrane science
Background:
- The fluid mosaic model (Singer and Nicolson) is a foundational concept for understanding biological membranes.
- It posits that membrane proteins and lipids are randomly distributed in a fluid lipid bilayer.
- This model has been instrumental in membrane research for decades.
Purpose of the Study:
- To propose an update to the fluid mosaic model.
- To describe a spatially adaptable fluid membrane.
- To suggest new modes of membrane function.
Main Methods:
- Rooted in the thermodynamics of lipid mixtures.
- Incorporates recent experimental findings.
- Theoretical framework development.
Main Results:
- Biological membranes are not just simple fluids but spatially adaptable.
- Membranes can tune their local composition in response to external forces.
- This adaptability is based on lipid mixture thermodynamics.
Conclusions:
- The revised fluid mosaic model offers a more dynamic view of membrane structure and function.
- Spatiotemporal adaptability of membrane composition is a key feature.
- This adaptability has significant implications for cellular processes and membrane biology.
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