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Related Experiment Video

Updated: May 30, 2026

Imaging Centrosomes in Fly Testes

Imaging Centrosomes in Fly Testes

Published on: September 20, 2013

Centrosome size: scaling without measuring.

Wallace F Marshall¹

¹Dept. of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA 94158, USA. wallace.marshall@ucsf.edu

Current Biology : CB

|August 9, 2011

Summary

Centrosome size is regulated by a limiting component mechanism. This process divides a fixed amount of precursor protein among all present centrosomes, explaining size control and scaling.

Area of Science:

Cell biology
Molecular biology
Biophysics

Background:

The centrosome is a key organelle in animal cells, serving as the main microtubule-organizing center.
Understanding the mechanisms that regulate centrosome size and duplication is crucial for cell cycle progression and development.

Purpose of the Study:

To elucidate the mechanism controlling centrosome size.
To investigate how centrosome size scales with cell volume.

Main Methods:

Theoretical modeling of protein distribution.
Mathematical analysis of component limitation.

Main Results:

A limiting component mechanism controls centrosome size.
This mechanism involves the division of a fixed quantity of precursor protein among existing centrosomes.

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Related Experiment Videos

Last Updated: May 30, 2026

Imaging Centrosomes in Fly Testes

Imaging Centrosomes in Fly Testes

Published on: September 20, 2013

Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes

Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes

Published on: December 20, 2014

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

Published on: March 3, 2016

The proposed scheme successfully explains both centrosome size control and its scaling relative to cell volume.

Conclusions:

Centrosome size regulation is achieved through a simple yet effective limiting component mechanism.
This mechanism provides a unified explanation for centrosome size control and cell volume scaling.