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Patterning of the cell cortex by Rho GTPases
William M Bement1, Andrew B Goryachev2, Ann L Miller3
1Center for Quantitative Cell Imaging, Department of Integrative Biology, University of Wisconsin-Madison, Madison, WI, USA. wmbement@wisc.edu.
Nature Reviews. Molecular Cell Biology
|January 3, 2024
Summary
Rho GTPases (guanosine triphosphateases) self-organize through coupled activation and inactivation, forming dynamic patterns. This self-organization is crucial for fundamental cell functions like division and movement.
Area of Science:
- Cell Biology
- Biochemistry
- Biophysics
Background:
- Rho GTPases (RHOA, RAC1, CDC42) are key regulators of cell cytoskeleton dynamics.
- They control cell locomotion, division, and morphogenesis by influencing actin assembly and myosin contraction.
- Previously, their in vivo function was assumed to be linear: activation followed by inactivation.
Purpose of the Study:
- To review evidence for coupled Rho GTPase activation and inactivation.
- To discuss Rho GTPase self-organization and pattern formation.
- To explore the functional advantages of these processes for cells.
Main Methods:
- Review of live cell imaging studies.
- Analysis of computational modeling data.
- Synthesis of experimental manipulation findings.
Main Results:
- Rho GTPase activation/inactivation are tightly coupled in space and time via feedback networks.
- This coupling enables Rho GTPases to self-organize into ordered states.
- Self-organization generates diverse spatiotemporal patterns (clusters, pulses, waves).
Conclusions:
- Rho GTPase self-organization is a fundamental mechanism driving cortical pattern formation.
- These patterns are essential for diverse cellular functions.
- Understanding these dynamics offers insights into cell biology and disease.
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