Taking the time to make important decisions: The checkpoint effector kinases Chk1 and Chk2 and the DNA damage response |
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| Authors: | Travis H Stracker Takehiko Usui John HJ Petrini |
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| Institution: | aMolecular Biology, Sloan-Kettering Institute, New York, NY, USA;bWeill Cornell Graduate School of Medical Science, New York, NY, USA;cThe Institute for Research in Biomedicine Barcelona, Barcelona, Spain |
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| Abstract: | The cellular DNA damage response (DDR) is activated by many types of DNA lesions. Upon recognition of DNA damage by sensor proteins, an intricate signal transduction network is activated to coordinate diverse cellular outcomes that promote genome integrity. Key components of the DDR in mammalian cells are the checkpoint effector kinases Chk1 and Chk2 (referred to henceforth as the effector kinases; orthologous to spChk1 and spCds1 in the fission yeast S. pombe and scChk1 and scRad53 in the budding yeast S. cerevisiae). These evolutionarily conserved and structurally divergent kinases phosphorylate numerous substrates to regulate the DDR. This review will focus on recent advances in our understanding of the structure, regulation, and functions of the effector kinases in the DDR, as well as their potential roles in human disease. |
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