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Circadian oscillation of a mammalian homologue of the Drosophila period gene

Author

Listed:
  • Hajime Tei

    (Human Genome Center, Institute of Medical Science, University of Tokyo)

  • Hitoshi Okamura

    (Kobe University School of Medicine)

  • Yasufumi Shigeyoshi

    (Kobe University School of Medicine)

  • Chiaki Fukuhara

    (The Scripps Research Institute)

  • Ritsuko Ozawa

    (Human Genome Center, Institute of Medical Science, University of Tokyo)

  • Matsumi Hirose

    (Human Genome Center, Institute of Medical Science, University of Tokyo)

  • Yoshiyuki Sakaki

    (Human Genome Center, Institute of Medical Science, University of Tokyo)

Abstract

Many biochemical, physiological and behavioural processes in organisms ranging from microorganisms to vertebrates exhibit circadian rhythms1. In Drosophila, the gene period (per) is required for the circadian rhythms of locomotor activity and eclosion behaviour2. Oscillation in the levels of per mRNA and Period (dPer) protein in the fly brain is thought to be responsible for the rhythmicity3,4. However, no per homologues in animals other than insects have been identified. Here we identify the human and mouse genes (hPER and mPer, respectively) encoding PAS-domain (PAS, a dimerization domain present in Per, Amt and Sim)-containing polypeptides that are highly homologous to dPer. Besides this structural resemblance, mPer shows autonomous circadian oscillation in its expression in the suprachiasmatic nucleus, which is the primary circadian pacemaker in the mammalian brain5,6. Clock, a mammalian clock gene encoding a PAS-containing polypeptide7,8, has now been cloned: it is likely that the Per homologues dimerize with other molecule(s) such as Clock through PAS–PAS interaction in the circadian clock system.

Suggested Citation

  • Hajime Tei & Hitoshi Okamura & Yasufumi Shigeyoshi & Chiaki Fukuhara & Ritsuko Ozawa & Matsumi Hirose & Yoshiyuki Sakaki, 1997. "Circadian oscillation of a mammalian homologue of the Drosophila period gene," Nature, Nature, vol. 389(6650), pages 512-516, October.
    • Handle: RePEc:nat:nature:v:389:y:1997:i:6650:d:10.1038_39086
    DOI: 10.1038/39086
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