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Circadian rhythms: mop up the clock!

S A Brown¹, U Schibler

¹Département de Biologie Moléculaire, Sciences II, Université de Genève 30, Quai Ernest Ansermet, CH-1211 Genève-4, Switzerland. steven.brown@molbiol.unige.ch

Current Biology : CB

|June 20, 2001

Summary

Circadian clock genes in fruit flies (Drosophila) share similarities with those in mammals. Recent research highlights key mammalian clock components, Mop3 and Per2, advancing our understanding of biological rhythms.

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Area of Science:

Chronobiology
Genetics
Molecular Biology

Background:

Circadian rhythms are fundamental biological processes present across species.
The fruit fly (Drosophila) has served as a model organism for dissecting circadian clock mechanisms.
Mammalian circadian clocks share homologous genes with Drosophila, suggesting conserved regulatory pathways.

Purpose of the Study:

To explore the evolutionary conservation and functional similarities between Drosophila and mammalian circadian clock genes.
To investigate the roles of specific mammalian clock components, Mop3 and Per2, in the regulation of circadian rhythms.
To identify key similarities and differences in the molecular architecture of insect and mammalian oscillators.

Main Methods:

Comparative genomic analysis of circadian clock genes between Drosophila and mammals.
Biochemical and genetic studies to elucidate the function of Mop3 and Per2 in mammalian cells.
Functional assays to assess the impact of Mop3 and Per2 on circadian rhythmicity.

Main Results:

Extensive sequence homology confirmed between Drosophila and mammalian circadian clock genes.
Identification of conserved and divergent features in the oscillatory mechanisms of insects and mammals.
New insights into the specific contributions of Mop3 and Per2 to the mammalian circadian clockwork.

Conclusions:

The fundamental principles of circadian timekeeping are conserved from insects to mammals.
Mop3 and Per2 are crucial components of the mammalian circadian clock, with distinct roles.
Understanding these conserved and divergent mechanisms is vital for deciphering biological timing and its disorders.

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