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Updated: Jan 12, 2026
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Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
Published on: January 18, 2014
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Condition-dependent resource allocation strategy governed by CodY regulator in Bacillus subtilis
Haoyan Mu1, Yiheng Wang1, Yongfu Pei1
1Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University Wuhan China.
Mlife
|November 3, 2025
Summary
CodY protein is essential for rapid bacterial growth in nutrient-rich conditions by preventing wasteful protein production. Its absence hinders growth, while its regulated expression aids adaptation to changing nutrient availability.
Area of Science:
- Microbiology
- Bacterial Physiology
- Molecular Biology
Background:
- Bacteria require rapid proliferation in favorable conditions and adaptation to nutrient fluctuations.
- Molecular mechanisms governing bacterial growth and adaptation are not fully understood.
Purpose of the Study:
- Investigate the role of CodY in the growth physiology of *Bacillus subtilis*.
- Elucidate how CodY influences cellular resource allocation in response to nutrient availability.
Main Methods:
- Comparative proteome allocation analysis between wild-type and *codY* knockout *Bacillus subtilis* strains.
- Assessment of bacterial growth rates in rich and minimal media.
Main Results:
- *codY* knockout significantly compromises growth in rich medium due to wasteful protein synthesis and reduced investment in translation machinery.
- Relief of CodY repression promotes adaptation to nutrient downshift by shifting resources from ribosome synthesis to amino acid biosynthesis.
- In minimal medium, relieved CodY repression upregulates motility and secondary metabolite biosynthesis.
Conclusions:
- CodY plays a pivotal role in bacterial growth control by governing condition-dependent resource allocation in *Bacillus subtilis*.
- CodY acts as a key regulator for bacterial fitness maximization strategies in fluctuating environments.
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