Reference: Duncker BP and Brown GW (2003) Cdc7 kinases (DDKs) and checkpoint responses: lessons from two yeasts. Mutat Res 532(1-2):21-7

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Abstract

Principally characterized for its requirement in the initiation of DNA replication, compelling evidence from two yeast model organisms now points to a central role for the Dbf4/Cdc7 kinase complex in S-phase checkpoint responses. Among the key findings supporting this view are observations that orthologs Dfp1 (Schizosaccharomyces pombe) and Dbf4 (Saccharomyces cerevisiae) interact with equivalent checkpoint kinases Cds1 and Rad53, respectively, and that mutants for Dbf4 and Cdc7 in these species are sensitive to genotoxic agents. Recently, these findings have been extended through mutational analyses of conserved regions in both Dfp1 and Dbf4, leading to the identification of distinct motifs which mediate cellular responses to DNA damage and replication fork arrest. The present review is a comparative survey of data obtained from studies conducted with S. pombe and S. cerevisae, and a consideration of models for the role played by Dbf4/Cdc7 in checkpoint responses.

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Journal Article
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Duncker BP, Brown GW
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