A role for casein kinase 2 in the mechanism underlying circadian temperature compensation.
A role for casein kinase 2 in the mechanism underlying circadian temperature compensation.
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DOI:
10.1016/j.cell.2009.03.019
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发表时间:
2009-05-15
期刊:
影响因子:
64.5
通讯作者:
Dunlap JC
中科院分区:
文献类型:
--
作者:
Mehra A;Shi M;Baker CL;Colot HV;Loros JJ;Dunlap JC
Temperature compensation of circadian clocks is an unsolved problem with relevance to the general phenomenon of biological compensation. We identify casein kinase 2 (CK2) as a key regulator of temperature compensation of theNeurosporaclock by determining that two long-standing clock mutants,chronoandperiod-3, displaying distinctive alterations in compensation encode the β1 and α subunits of CK2, respectively. Reducing the dose of these subunits, particularly β1, significantly alters temperature compensation without altering the enzyme's Q10. By contrast, other kinases and phosphatases implicated in clock function do not play appreciable roles in temperature compensation. CK2 exerts its effects on the clock by directly phosphorylating FREQUENCY (FRQ), and this phosphorylation is compromised in CK2 hypomorphs. Finally, mutation of certain putative CK2 phosphosites on FRQ, shown to be phosphorylated in vivo, predictably alters temperature compensation profiles effectively phenocopying CK2 mutants.
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影响因子:
10.5
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通讯作者:
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DOI:
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发表时间:
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