Self-Assembly of Biomolecular Condensates with Shared Components

Area of Science:

• Cell biology
• Biophysics
• Systems biology

Background:

• Biomolecular condensates are membraneless compartments formed by proteins and nucleic acids.
• Their formation is crucial for cellular organization within the crowded intracellular environment.
• Understanding how multiple, distinct condensates assemble is key, especially in non-equilibrium systems.

Purpose of the Study:

• To investigate the principles governing the self-assembly of multiple distinct biomolecular condensates.
• To explore how programmable pairwise interactions influence condensate formation and complexity.
• To develop predictive models for condensate assembly in complex mixtures.

Main Methods:

• Utilized a minimal model to "program" pairwise interactions among hundreds of species.
• Employed computational simulations to model condensate growth and assembly.
• Developed theoretical predictions for the maximum number of distinct condensates.

Main Results:

• The number of distinct condensates grows superlinearly with the number of species when components are shared.
• A method was developed to predict the maximum number of distinct condensates without detailed interaction knowledge.
• Simulations confirmed theoretical predictions regarding condensate assembly and complexity.

Conclusions:

• Programmable interactions enable complex spatial organization through biomolecular condensates.
• The number of species dictates the potential for diverse condensate formation.
• The findings offer broadly applicable physical rules for biomolecular mixture organization.