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Multi-condensate state as a functional strategy to optimize the cell signaling output
Aniruddha Chattaraj1, Eugene I Shakhnovich1
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA.
Biorxiv : the Preprint Server for Biology
|May 27, 2024
Summary
Multiple biomolecular condensates in cells optimize function, acting as a strategy for cellular processes. This multiple condensate state (MCS) enhances cellular responses compared to single condensates.
Area of Science:
- Cellular Biology
- Biophysics
- Statistical Mechanics
Background:
- Living cells exhibit multiple biomolecular condensates, a phenomenon not explained by equilibrium statistical mechanics.
- The functional role of this multiple condensate state (MCS) remains an open question in cell biology.
Approach:
- Combined Langevin dynamics, reaction-diffusion simulations, and dynamical systems theory.
- Investigated the Arp2/3 mediated actin nucleation pathway as a model system.
- Analyzed the impact of condensate number and size distribution on cellular function.
Key Points:
- Demonstrated that the multiple condensate state (MCS) serves as a functional optimization strategy.
- Showed that actin polymerization is maximized at an optimal number of condensates.
- MCS yields a greater cellular response than a single condensate for a fixed amount of Arp2/3.
Conclusions:
- The condensate size distribution has functional significance, aligning with experimental observations.
- MCS is proposed as a generic functional solution for intracellular networks.
- Cellular network structures may have evolved to support these configurations.
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