Orchestrating vesicular and nonvesicular membrane dynamics by intrinsically disordered proteins

Area of Science:

• Cell Biology
• Biochemistry
• Molecular Biology

Background:

• Eukaryotic cells utilize membrane-bound organelles for compartmentalization and controlled biochemical reactions.
• Organelles exchange materials via vesicular trafficking and membrane contact sites (MCSs).
• Both transport mechanisms involve protein-mediated interactions.

Purpose of the Study:

• To review the role of intrinsically disordered proteins (IDPs) in cellular membrane transport.
• To highlight how IDPs mediate vesicular and nonvesicular exchange.
• To discuss the implications of IDP dysfunction in disease, focusing on presynaptic neurotransmission.

Main Methods:

• Literature review of recent data on protein-mediated membrane dynamics.
• Analysis of the role of intrinsically disordered regions (IDRs) in protein assembly.
• Focus on protein condensates and multivalent interactions in membrane tethering, deformation, fission, and fusion.

Main Results:

• IDPs utilize low-affinity, multivalent interactions to form dynamic protein assemblies and condensates.
• These assemblies are critical for orchestrating both vesicular and nonvesicular transport pathways.
• IDPs play a significant role in presynaptic neurotransmission.

Conclusions:

• IDPs are key regulators of membrane trafficking through the formation of functional protein assemblies.
• Understanding IDP mechanisms offers insights into cellular physiology and disease pathogenesis.
• Further research into IDPs holds potential for therapeutic strategies.