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Article

Dephosphorylation of the core clock protein KaiC in the cyanobacterial KaiABC circadian oscillator proceeds via an ATP synthase mechanism.

Biochemistry - 28 Feb 2012

Egli Martin, Mori Tetsuya, Pattanayek Rekha, Xu Yao, Qin Ximing, Johnson Carl H

Abstract excerpt

The circadian clock of the cyanobacterium Synechococcus elongatus can be reconstituted in vitro from three proteins, KaiA, KaiB, and KaiC in the presence of ATP, to tick in a temperature-compensated manner. KaiC, the central cog of this oscillator, forms a homohexamer with 12 ATP molecules bound between its N- and C-terminal domains and exhibits unusual properties. Both the N-terminal (CI) and C-terminal (CII)...

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Identifiers

PMID: 22304631
DOI: 10.1021/bi201525n
PMCID: PMC3293397

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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Dephosphorylation of the core clock protein KaiC in the cyanobacterial KaiABC circadian oscillator proceeds via an ATP synthase mechanism.PMID 22304631Read ↗

Structures of KaiC circadian clock mutant proteins: a new phosphorylation site at T426 and mechanisms of kinase, ATPase and phosphatase.Semantic proximity Read ↗

Analysis of KaiA-KaiC protein interactions in the cyano-bacterial circadian clock using hybrid structural methods.Semantic proximity Read ↗

Loop-loop interactions regulate KaiA-stimulated KaiC phosphorylation in the cyanobacterial KaiABC circadian clock.Semantic proximity Read ↗

Protein-Protein Interactions in the Cyanobacterial Circadian Clock: Structure of KaiA Dimer in Complex with C-Terminal KaiC Peptides at 2.8 Å Resolution.Semantic proximity Read ↗

ATPase activity of KaiC determines the basic timing for circadian clock of cyanobacteria.Semantic proximity Read ↗

Intramolecular regulation of phosphorylation status of the circadian clock protein KaiC.Semantic proximity Read ↗

Visualizing a circadian clock protein: crystal structure of KaiC and functional insights.Semantic proximity Read ↗

Circadian rhythms in the synthesis and degradation of a master clock protein KaiC in cyanobacteria.Semantic proximity Read ↗

Tetrameric architecture of the circadian clock protein KaiB. A novel interface for intermolecular interactions and its impact on the circadian rhythm.Semantic proximity Read ↗

Rhythmic adenosine triphosphate release from the cyanobacterial circadian clock protein KaiC revealed by real-time monitoring of bioluminescence using firefly luciferase.Semantic proximity Read ↗

Phase-dependent generation and transmission of time information by the KaiABC circadian clock oscillator through SasA-KaiC interaction in cyanobacteria.Semantic proximity Read ↗

Regulation mechanism study of residues E318/319 for KaiC protein phosphorylation.Semantic proximity Read ↗

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