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Updated: Jun 21, 2026

Monitoring the Effect of Osmotic Stress on Secretory Vesicles and Exocytosis

Monitoring the Effect of Osmotic Stress on Secretory Vesicles and Exocytosis

Published on: February 19, 2018

Entropy decrease associated to solute compartmentalization in the cell.

Dolores Marín¹, Mercedes Martín, Bartolomé Sabater

¹Department of Physical Chemistry, University of Alcalá, Alcalá de Henares, 28871 Madrid, Spain.

|July 15, 2009

Summary

Cellular compartmentalization significantly reduces entropy, a key factor in biological evolution. This finding quantifies the entropic contribution of internal cell structures, impacting our understanding of life

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Area of Science:

Biophysics
Cell Biology
Evolutionary Biology

Background:

Eukaryotic cells possess complex internal structures (organelles) that compartmentalize biochemical processes.
The role of compartmentalization in reducing cellular entropy and its evolutionary significance is not fully quantified.

Purpose of the Study:

To deduce equations quantifying the entropy associated with cellular compartmentalization.
To estimate the entropic contribution of compartmentalization in representative eukaryotic cells.

Main Methods:

Developed theoretical equations linking entropy to cell/compartment volumes and solute concentrations.
Applied equations using known biological values for Saccharomyces cerevisiae and Chlamydomonas reinhardtii.

Main Results:

Quantified compartmentalization's entropy decrease in Saccharomyces cerevisiae (-14.4 x 10^-14 JK^-1 cell^-1).
Estimated a larger entropy decrease in Chlamydomonas reinhardtii (-49.6 x 10^-14 JK^-1 cell^-1) due to its complexity.
Compartmentalization's entropic contribution is significant compared to DNA and protein entropy.

Conclusions:

Cellular compartmentalization is a crucial evolutionary development that substantially lowers cellular entropy.
This reduction in entropy is a fundamental aspect of cellular organization and function.
The quantitative framework provides insights into the biophysical underpinnings of cellular complexity.