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p38 and Chk1 kinases: different conductors for the G(2)/M checkpoint symphony

, : p38 and Chk1 kinases: different conductors for the G(2)/M checkpoint symphony. Current Opinion in Genetics & Development 12(1): 92-97

The mechanism controlling G(2)/M checkpoint activation after DNA damage was thought to be mediated primarily by nuclear Chk1/Chk2 kinases. Recent evidence indicates that this checkpoint is more complex, involving at least two different biochemical systems that target the Cdc25B and Cdc25C phosphatases. Following genotoxic stress, different kinases integrate signaling from the damaged DNA and other damaged cellular components to regulate Cdc25 inactivation. Our current model for G(2)/M checkpoint activation after genotoxic stress is discussed emphasizing the roles for Chk1 and p38 kinases in checkpoint regulation.


PMID: 11790561

DOI: 10.1016/s0959-437x(01)00270-2

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