Wet scissors: How biomolecular condensates cut cellular membranes

Area of Science:

• Cell Biology
• Biophysics

Background:

• Cellular organization relies on membrane shape, with reshaping critical for processes like cell division and membrane trafficking.
• Membrane fission, a key topological change, is often driven by specialized proteins forming oligomeric spirals.

Purpose of the Study:

• To review evidence that capillary forces from biomolecular condensates can drive membrane reshaping and fission.
• To describe the molecular and physical principles behind condensate-mediated membrane cutting.
• To explore interactions between condensate-mediated and established membrane remodeling processes.

Main Methods:

• Review of existing evidence on biomolecular condensates and membrane dynamics.
• Analysis of recent findings on condensate involvement in multivesicular body formation.
• Discussion of molecular and physical principles governing condensate-membrane interactions.

Main Results:

• Biomolecular condensates, through capillary forces, can facilitate cellular membrane reshaping and drive fission events.
• Condensates are implicated in multivesicular body formation, demonstrating their role in membrane remodeling.
• Novel condensate-mediated fission processes may interact with established protein-driven mechanisms.

Conclusions:

• Biomolecular condensates contribute significantly to membrane remodeling in the biogenesis of cellular structures.
• Understanding condensate-mediated membrane reshaping can transform the study of intracellular organization and dynamics.
• This mechanism offers a new perspective on how cells manage membrane dynamics.