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Biomolecular Condensates at the Front: Cell Migration Meets Phase Separation
1San Raffaele Scientific Institute and Vita-Salute San Raffaele University, Division of Neuroscience, 20132, Milano, Italy.
Trends in Cell Biology
|January 5, 2021
Summary
Biomolecular condensates (BCs) form through liquid-liquid phase separation, organizing cellular functions. New evidence suggests these condensates near focal adhesions regulate cell migration dynamics.
Area of Science:
- Cell Biology
- Biophysics
Background:
- Liquid-liquid phase separation (LLPS) is a fundamental mechanism for organizing cellular components into biomolecular condensates (BCs).
- Biomolecular condensates are increasingly recognized for their roles in regulating diverse cellular processes, including signal transduction and gene expression.
- Plasma-membrane-associated platforms are known to interact with the cytoskeleton and influence cell behavior.
Purpose of the Study:
- To investigate the formation and function of biomolecular condensates at the cell periphery, specifically near focal adhesions.
- To explore the role of phase separation in regulating dynamic cellular processes at the leading edge of migrating cells.
- To understand how plasma-membrane-associated platforms contribute to the spatial organization of cellular activities.
Main Methods:
- Utilizing advanced microscopy techniques to visualize biomolecular condensate formation in live cells.
- Employing biochemical assays to identify the components of condensates associated with focal adhesions.
- Performing live-cell imaging and perturbation experiments to assess the impact of condensates on cell migration.
Main Results:
- Evidence indicates that components of plasma-membrane-associated platforms assemble into biomolecular condensates in proximity to focal adhesions.
- These focal adhesion-associated biomolecular condensates exhibit dynamic properties consistent with liquid-like behavior.
- Observations suggest that phase separation involving these condensates plays a regulatory role in cellular processes occurring at the front of migrating cells.
Conclusions:
- Biomolecular condensates form near focal adhesions, driven by liquid-liquid phase separation.
- These condensates are implicated in the spatiotemporal regulation of cell migration dynamics.
- The findings highlight a novel mechanism by which phase separation organizes cellular functions at the plasma membrane.
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