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The role of an E-box element: multiple frunctions and interacting partners.

ABSTRACT: Circadian clocks can be entrained by light-dark or temperature cycles. In the green alga Chlamydomonas reinhardtii, 12h changes in temperature between 18°C and 28°C synchronize its clock. Both subunits of the circadian RNA-binding protein CHLAMY1, named C1 and C3, are able to integrate temperature information. C1 gets hyper-phosphorylated in cells grown at 18°C and the level of C3 is up-regulated at this temperature. In the long period mutant per1, where temperature entrainment is disturbed, the temperature-dependent regulation of C1 and C3 is altered. Up-regulation of C3 at the low temperature is mediated predominantly by an E-box element situated in its promoter region. This cis-acting element is also relevant for circadian expression of c3 as well as of its up-regulation in cells, where C1 is overexpressed. Among the few identified factors interacting with the E-box region, C3 is also present, suggesting that it feedbacks on its own transcription.

SUBMITTER: Seitz SB

PROVIDER: S-EPMC3115072 | biostudies-literature | 2010 Sep

REPOSITORIES: biostudies-literature

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The role of an E-box element: multiple frunctions and interacting partners.

Seitz Stefanie B SB Voytsekh Olga O Mohan Karthik M KM Mittag Maria M

Plant signaling & behavior 20100901 9

Circadian clocks can be entrained by light-dark or temperature cycles. In the green alga Chlamydomonas reinhardtii, 12h changes in temperature between 18°C and 28°C synchronize its clock. Both subunits of the circadian RNA-binding protein CHLAMY1, named C1 and C3, are able to integrate temperature information. C1 gets hyper-phosphorylated in cells grown at 18°C and the level of C3 is up-regulated at this temperature. In the long period mutant per1, where temperature entrainment is disturbed, the ...[more]

PMID: 20818183

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The role of an E-box element: multiple frunctions and interacting partners.

Publications

The role of an E-box element: multiple frunctions and interacting partners.

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