How Curved Proteins Drive Cell Membrane Waves
Author Information
Author(s): Peleg Barak, Disanza Andrea, Scita Giorgio, Gov Nir
Primary Institution: Weizmann Institute of Science, Rehovot, Israel
Hypothesis
The activity of both concave and convex membrane proteins is essential for sustaining propagating cell-membrane waves.
Conclusion
The study demonstrates that curved membrane proteins play a crucial role in organizing the actin cytoskeleton and controlling cell shape through the formation of propagating membrane waves.
Supporting Evidence
- CDRs are formed in response to growth factor stimulation and are driven by actin polymerization.
- Inhibition of myosin II does not affect the formation of CDRs, indicating they are independent of myosin contractility.
- The model predicts that both types of curved proteins are necessary for the initiation and maintenance of propagating waves.
Takeaway
Cells can create waves on their membranes using special proteins that help shape the membrane and control movement.
Methodology
The study involved experiments on mouse embryo fibroblasts treated with PDGF and various myosin inhibitors, followed by time-lapse video microscopy to observe CDR dynamics.
Limitations
The model assumes uniform actin polymerization and does not account for spatial variations in activator concentration.
Participant Demographics
Mouse embryo fibroblasts (MEF) derived from Eps8 null mice.
Digital Object Identifier (DOI)
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