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Related Experiment Videos

Cycle-regulated genes and cell cycle regulation.

R D'Ari1

  • 1Institut Jacques Monod (C.N.R.S., Universités Paris 6, Paris 7), 2 place Jussieu, F-75251 Paris Cedex 05, France. dari@ijm.jussieu.fr

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|July 20, 2001
PubMed
Summary

Researchers mapped gene expression throughout the Caulobacter crescentus cell cycle. They identified 553 cell-cycle-regulated genes, with many controlled by the CtrA regulator, revealing intricate cell cycle control mechanisms.

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Area of Science:

  • Microbiology
  • Genomics
  • Cell Biology

Background:

  • The Caulobacter crescentus genome is well-characterized.
  • Understanding cell cycle regulation is crucial for bacterial growth and division.

Purpose of the Study:

  • To comprehensively map the transcriptional profile of Caulobacter crescentus during a synchronous cell cycle.
  • To identify cell-cycle-regulated genes and their potential functions.
  • To investigate the role of the master regulator CtrA in gene expression.

Main Methods:

  • Genome-wide transcriptional profiling of synchronous Caulobacter crescentus cultures.
  • Bioinformatic analysis to identify cell-cycle-regulated genes (ORFs).
  • Analysis of gene regulation by the CtrA master regulator.

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Main Results:

  • Identified 553 cell-cycle-regulated genes, representing approximately 19% of the genome.
  • These genes cover diverse biological activities.
  • Over 25% of regulated genes respond to CtrA, often indirectly.
  • Expression patterns correlate with protein function timing during the cell cycle.

Conclusions:

  • Caulobacter crescentus exhibits extensive cell-cycle-dependent gene regulation.
  • The CtrA regulator plays a significant role in orchestrating this transcriptional program.
  • Gene expression timing is tightly linked to the functional requirements of specific cell cycle stages.