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Related Experiment Videos

Common threads in eukaryotic circadian systems

J C Dunlap1

  • 1Department of Biochemistry, Dartmouth Medical School, Hanover, New Hampshire 03755, USA. jay.c.dunlap@dartmouth.edu

Current Opinion in Genetics & Development
|September 8, 1998
PubMed
Summary

Eukaryotic circadian systems share common regulatory patterns. Transcription factors act as positive regulators, while proteins like FREQUENCY (FRQ) function as negative elements, with post-transcriptional control influencing temperature responsiveness.

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Area of Science:

  • Molecular Biology
  • Chronobiology
  • Genetics

Background:

  • Eukaryotic circadian systems exhibit conserved regulatory mechanisms.
  • Understanding these systems is crucial for deciphering biological timekeeping.

Purpose of the Study:

  • To identify and describe common regulatory patterns in eukaryotic circadian clocks.
  • To elucidate the roles of specific protein complexes and post-transcriptional control in circadian regulation.

Main Methods:

  • Comparative analysis of regulatory patterns across different eukaryotic taxa.
  • Identification of key protein families involved in circadian feedback loops.

Main Results:

  • Emergence of common regulatory patterns in circadian systems from fungi to mammals.

Related Experiment Videos

  • Heterodimeric PAS-domain transcription factors act as positive regulators.
  • Proteins like FREQUENCY (FRQ), PERIOD (PER), and TIMELESS (TIM) function as negative elements.
  • Post-transcriptional control modulates FRQ levels and circadian temperature sensitivity.

    • Conclusions:

    • Conserved molecular mechanisms underpin eukaryotic circadian clocks.
    • Transcription factor complexes and post-transcriptional regulation are key to clock function and environmental responsiveness.