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Positional Syntenic Cloning and Functional Characterization of the Mammalian Circadian Mutation tau

Open access
Lowrey, Phillip L., Shimomura, Kazuhiro, Antoch, Marina P., Yamazaki, Shin, Zemenides, Peter D., Ralph, Martin R., Menaker, Michael, Takahashi, Joseph S.·2000·Science

Abstract

The tau mutation is a semidominant autosomal allele that dramatically shortens period length of circadian rhythms in Syrian hamsters. We report the molecular identification of the tau locus using genetically directed representational difference analysis to define a region of conserved synteny in hamsters with both the mouse and human genomes. The tau locus is encoded by casein kinase I epsilon (CKIɛ), a homolog of the Drosophila circadian gene double-time . In vitro expression and functional studies of wild-type and tau mutant CKIɛ enzyme reveal that the mutant enzyme has a markedly reduced maximal velocity and autophosphorylation state. In addition, in vitro CKIɛ can interact with mammalian PERIOD proteins, and the mutant enzyme is deficient in its ability to phosphorylate PERIOD. We conclude that tau is an allele of hamster CKIɛ and propose a mechanism by which the mutation leads to the observed aberrant circadian phenotype in mutant animals.

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Metadata

Authors
Lowrey, P. L., Shimomura, K., Antoch, M. P., Yamazaki, S., Zemenides, P. D., Ralph, M. R., Menaker, M., & Takahashi, J. S.
Venue
Science
Published
2000-04-21
Volume
288
Issue
5465
Pages
483-491
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2160091872
Cited by
862
References
7
FWCI
22.15
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Positional Syntenic Cloning and Functional Characterization of the Mammalian Circadian Mutation tau. https://app.cochat.ai/papers/10.1126/science.288.5465.483
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Lowrey, P. L., Shimomura, K., Antoch, M. P., Yamazaki, S., Zemenides, P. D., Ralph, M. R., Menaker, M., & Takahashi, J. S. (2000). Positional Syntenic Cloning and Functional Characterization of the Mammalian Circadian Mutation tau. Science. https://doi.org/10.1126/science.288.5465.483

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