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Updated: May 16, 2026

Synchronization of Caulobacter Crescentus for Investigation of the Bacterial Cell Cycle

Synchronization of Caulobacter Crescentus for Investigation of the Bacterial Cell Cycle

Published on: April 8, 2015

Phase resetting reveals network dynamics underlying a bacterial cell cycle.

Yihan Lin¹, Ying Li, Sean Crosson

¹Department of Chemistry, University of Chicago, Chicago, Illinois, United States of America.

Plos Computational Biology

|December 5, 2012

Summary

This summary is machine-generated.

Researchers developed chemical perturbation spectroscopy (CPS) to understand biological networks. This method reveals how cell-cycle control modules in Caulobacter crescentus are organized and interact, uncovering a novel mechanism for precise temporal regulation.

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Area of Science:

Microbiology
Systems Biology
Cell Biology

Background:

Genomic and proteomic methods reveal biological regulatory networks but lack insight into functional module organization and information flow.
Caulobacter crescentus serves as a model organism for studying cell-cycle control mechanisms.

Purpose of the Study:

To introduce a novel approach, chemical perturbation spectroscopy (CPS), for dissecting biological network dynamics.
To investigate the organization and information flow within the cell-cycle regulatory network of Caulobacter crescentus.

Main Methods:

Utilizing an inducible promoter to express the essential transcriptional regulator ctrA in a pulsed manner.
Perturbing the ctrA expression to induce synchronous cell division in Caulobacter crescentus.
Constructing a phase resetting curve by analyzing the advance or delay of single-cell division times.

Main Results:

Demonstrated that cell division delay is strongly favored over advance, a finding not predicted by existing models.
Proposed a phenomenological model suggesting two autonomously oscillating, asymmetrically coupled functional modules in the cell-cycle network.
Identified a novel mechanism for tight temporal control of the cell cycle in Caulobacter crescentus.

Conclusions:

Chemical perturbation spectroscopy (CPS) provides complementary information to genomic and proteomic methods for understanding network organization and dynamics.
The cell-cycle network of Caulobacter crescentus exhibits distinct modularity and asymmetric coupling, enabling precise temporal regulation.
The CPS approach offers a generalizable method for probing the dynamics of biological regulatory networks.