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Finding new clock components: past and future.

Joseph S Takahashi1

  • 1Howard Hughes Medical Institute, Department of Neurobiology & Physiology, Northwestern University, Evanston, IL 60208-3520, USA. j-takahashi@northwestern.edu.

Journal of Biological Rhythms
|November 13, 2004
PubMed
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Understanding circadian clock genes relies on genetic analysis. This perspective reviews past and future methods for identifying core clock components and their molecular mechanisms.

Area of Science:

  • * Chronobiology and molecular genetics.
  • * Focus on the molecular mechanisms of biological clocks.

Background:

  • * Phenotype-driven genetic analysis has been key to understanding circadian clock mechanisms in model organisms.
  • * The field is at a stage to define criteria for clock components and assess the completeness of identified primary components.

Purpose of the Study:

  • * To discuss the definition and criteria for identifying circadian clock components.
  • * To review the historical and future roles of genetics, molecular biology, and biochemistry in discovering clock genes.

Main Methods:

  • * Review of phenotype-driven (forward) genetic analysis.
  • * Integration of molecular biology and biochemistry techniques.
  • * Perspective on the application of these methods for future gene discovery.

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Main Results:

  • * Established methods have successfully identified key circadian clock genes.
  • * The current understanding allows for critical evaluation of what constitutes a clock component.
  • * Future research directions are proposed for comprehensive clock gene identification.

Conclusions:

  • * Genetics, molecular biology, and biochemistry are essential for unraveling circadian clock mechanisms.
  • * Continued application of these disciplines will refine our understanding of clock components.
  • * The field is progressing towards a comprehensive identification of primary circadian clock genes.