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EMBO J. Dec 15, 1998; 17(24): 7230–7238.
PMCID: PMC1171069

Fission yeast Csk1 is a CAK-activating kinase (CAKAK).

Abstract

Cell cycle progression is dependent on the sequential activity of cyclin-dependent kinases (CDKs). For full activity, CDKs require an activating phosphorylation of a conserved residue (corresponding to Thr160 in human CDK2) carried out by the CDK-activating kinase (CAK). Two distinct CAK kinases have been described: in budding yeast Saccharomyces cerevisiae, the Cak1/Civ1 kinase is responsible for CAK activity. In several other species including human, Xenopus, Drosophila and fission yeast Schizosaccharomyces pombe, CAK has been identified as a complex homologous to CDK7-cyclin H (Mcs6-Mcs2 in fission yeast). Here we identify the fission yeast Csk1 kinase as an in vivo activating kinase of the Mcs6-Mcs2 CAK defining Csk1 as a CAK-activating kinase (CAKAK).

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Selected References

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