Microscopic origin of the spatial and temporal precision in biological systems

Anupam Mondal ¹, Anatoly B Kolomeisky ²

⁰Center for Theoretical Biological Physics, Rice University, Houston, Texas; Department of Chemistry, Rice University, Houston, Texas.

Biophysical Reports +

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January 30, 2025

View abstract on PubMed

Summary

Biological systems achieve precise spatial and temporal regulation through the coupling of random chemical processes. This stochastic coupling framework explains bacterial cell size and bacteriophage lysis timing, aligning with experimental data.

Area Of Science

Biophysics
Systems Biology
Molecular Biology

Background

Living systems exhibit high spatial and temporal precision despite environmental fluctuations and random chemical reactions.
The molecular mechanisms underlying biological precision are not fully understood.
A novel theoretical framework proposes stochastic process coupling to explain biological precision.

Purpose Of The Study

To review and illustrate a novel theoretical approach based on stochastic coupling.
To explain precision control in bacterial cell-size regulation and bacteriophage lambda lysis timing.
To demonstrate how stochastic coupling eliminates the need for phenomenological threshold concepts.

Main Methods

Theoretical modeling of stochastic processes.
Application of the stochastic coupling framework to bacterial cell growth/division and bacteriophage lysis.
Evaluation of dynamic properties of biological systems.

Main Results

A balance between stochastic cell growth and division explains narrow bacterial cell-size distributions.
Coupling of holin protein accumulation and membrane breakage precisely times bacteriophage lambda cell lysis.
The stochastic coupling model shows excellent agreement with experimental observations.

Conclusions

The stochastic coupling method effectively explains precise biological regulation at the molecular level.
This framework provides a powerful tool for investigating complex biological phenomena.
The approach captures essential aspects of molecular mechanisms driving cellular precision.