| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 2049405 | FEBS Letters | 2010 | 5 Pages |
Abstract
Biochemical circadian oscillation of KaiC phosphorylation, by mixing three Kai proteins and ATP, has been proven to be the central oscillator of the cyanobacterial circadian clock. In vivo, the intracellular levels of KaiB and KaiC oscillate in a circadian fashion. By scrutinizing KaiC phosphorylation rhythm in a wide range of Kai protein concentrations, KaiA and KaiB were found to be “parameter-tuning” and “state-switching” regulators of KaiC phosphorylation rhythm, respectively. Our results also suggest a possible entrainment mechanism of the cellular circadian clock with the circadian variation of intracellular levels of Kai proteins.
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Authors
Masato Nakajima, Hiroshi Ito, Takao Kondo,