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Circadian Clock in Synechococcus

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Circadian rhythms are endogenous biological programs that allow organisms to anticipate changes in their environment, such as the onset of dawn and dusk, thereby coordinating temporal phases of physiology with the external environment. In plants, the circadian clock organizes a wide array of daily rhythms, including the expression of genes involved in photosynthesis, sugar metabolism, nutrient assimilation, stomatal opening, and leaf movements. In addition, two other clock properties, entrainment (setting the clock to local time with respect to environmental cycles) and temperature compensation (the ability of the clock to run at the same rate at different temperatures) ensure synchrony with the environment (Ref.1).

At the core of a circadian system is a molecular oscillator that generates a period of rhythmicity of [...]


1.Functional divergence of the circadian clock proteins in prokaryotes
Dvornyk V, Knudsen B
Genetica. 2005 Jul; 124(2-3):247-54.
2.Tetrameric architecture of the circadian clock protein KaiB. A novel interface for intermolecular interactions and its impact on the circadian rhythm.
Hitomi K, Oyama T, Han S, Arvai AS, Getzoff ED.
J Biol Chem. 2005 May 13;280(19):19127-35. Epub 2005 Feb 16
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