Cyclin-dependent kinases and cell-cycle transitions: does one fit all?


Cell-cycle transitions in higher eukaryotes are regulated by different cyclin-dependent kinases (CDKs) and their activating cyclin subunits. Based on pioneering findings that a dominant-negative mutation of CDK1 blocks the cell cycle at G2–M phase, whereas dominant-negative CDK2 inhibits the transition into S phase, a model of cell-cycle control has emerged in which each transition is regulated by a specific subset of CDKs and cyclins. Recent work with gene-targeted mice has led to a revision of this model. We discuss cell-cycle control in light of overlapping and essential functions of the different CDKs and cyclins.

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Figure 1: The classical and minimal models of cell-cycle control.


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We would like to thank T. Carr, N. Hegarat, T. Hunter, J. Pines and R. Poon for critical comments on the manuscript. H.H. is a Wellcome Trust Career Development Fellow at the Genome Damage and Stability Centre at the University of Sussex, S.T. holds the chair for Radiation Genetics at Kyoto University Medical School and T.H. is a principal investigator at CRUK Clare Hall laboratories.

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Hochegger, H., Takeda, S. & Hunt, T. Cyclin-dependent kinases and cell-cycle transitions: does one fit all?. Nat Rev Mol Cell Biol 9, 910–916 (2008).

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