Journal
FEBS LETTERS
Volume 477, Issue 1-2, Pages 106-112Publisher
WILEY
DOI: 10.1016/S0014-5793(00)01755-5
Keywords
circadian rhythm; differential display; suprachiasmatic nucleus; Per; phosphorylation; nuclear translocation
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Genes differentially expressed in the subjective day and night in the rat suprachiasmatic nucleus (SCN) were surveyed by differential display. A gene homologous to human casein kinase 1 epsilon(CK1 epsilon) was isolated, which initially appeared to be expressed in the suprachiasmatic nucleus (SCN) in a circadian manner. We here describe the cDNA cloning of the rat CK1 epsilon and characterization of the protein products. The rCK1 epsilon is predominantly expressed in the brain including the SCN, binds and phosphorylates mPer1, mPer2, and mPer3 in vitro, and translocates mPer1 and mPer3, but not mPer2, to the cell nucleus depending on its kinase activity when coexpressed with these Per proteins in COS-7 cells. (C) 2000 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved.
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