Organization and Function of Non-dynamic Biomolecular Condensates

Area of Science:

• Cell biology
• Biochemistry
• Biophysics

Background:

• Cells utilize organelles for compartmentalizing biochemical reactions.
• Organelles include membrane-bound compartments and protein-ribonucleic acid assemblies called biomolecular condensates.
• Biomolecular condensates, initially thought to be liquid-like, can mature into more stable structures.

Purpose of the Study:

• To discuss the assembly, organization, and physiological roles of stable biomolecular condensates.
• To explore how material properties of condensates relate to liquid-liquid phase separation and maturation.
• To focus on specific stable condensates: Balbiani bodies, centrosomes, nuclear pores, and amyloid bodies.

Main Methods:

• Review of existing experimental data and literature.
• Theoretical discussion based on principles of liquid-liquid phase separation.
• Analysis of condensate material properties and their implications.

Main Results:

• Stable biomolecular condensates can form through maturation of liquid-like precursors.
• These stable condensates include Balbiani bodies, centrosomes, nuclear pores, and amyloid bodies.
• The behavior of condensates is explained by liquid-liquid phase separation and maturation processes.

Conclusions:

• Stable biomolecular condensates are essential cellular components with diverse physiological functions.
• Understanding condensate material properties provides insights into cellular organization.
• Liquid-liquid phase separation and maturation are key mechanisms governing condensate formation and stability.