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Related Experiment Videos

Regulation of clock genes.

Y Liu1, C Heintzen, J Loros

  • 1Department of Biochemistry, Dartmouth Medical School, Hanover, New Hampshire 03755, USA. Yi.Liu@dartmouth.edu

Cellular and Molecular Life Sciences : CMLS
|September 16, 1999
PubMed
Summary

New research reveals common themes in the structure, function, and regulation of circadian clock components across diverse organisms. Negative feedback loops and both transcriptional and posttranscriptional mechanisms are vital for generating daily rhythms.

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Area of Science:

  • * Chronobiology and molecular biology.
  • * Comparative genomics and systems biology.

Background:

  • * Significant advancements in identifying circadian clock components across various taxa, including cyanobacteria, fungi, insects, mammals, and plants.
  • * Previous research highlighted the complexity of biological timing mechanisms.

Purpose of the Study:

  • * To synthesize recent findings on circadian clock components.
  • * To identify common themes in the structure, function, and regulation of these components across different life forms.
  • * To underscore the importance of conserved regulatory mechanisms in circadian rhythm generation.

Main Methods:

  • * Review and synthesis of recent literature on circadian clock component identification and characterization.
  • * Comparative analysis of identified clock components across diverse organisms.

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  • * Analysis of regulatory mechanisms, including feedback loops and transcriptional/posttranscriptional control.

    • Main Results:

    • * Common themes identified in the structure, function, and regulation of circadian clock components.
    • * Crucial role of positive and negative interactions organized in negative feedback loops for clock function.
    • * Importance of both transcriptional and posttranscriptional mechanisms for circadian rhythm generation.

    Conclusions:

    • * Circadian clocks exhibit conserved regulatory principles across a wide range of organisms.
    • * Negative feedback loops are fundamental to the robustness and function of biological clocks.
    • * Both transcriptional and posttranscriptional regulation are essential for generating precise circadian rhythms.