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Reference: Chen SH, et al. (2010) A proteome-wide analysis of kinase-substrate network in the DNA damage response. J Biol Chem 285(17):12803-12

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Abstract

The DNA damage checkpoint, consisting of an evolutionarily conserved protein kinase cascade, controls the DNA damage response in eukaryotes. Knowledge of the in vivo substrates of the checkpoint kinases is essential towards understanding their functions. Here we used quantitative mass spectrometry to identify 53 new and 34 previously known targets of Mec1/Tel1, Rad53 and Dun1 in Saccharomyces cerevisiae. Analysis of Replication Protein-A (RPA) associated proteins reveals extensive physical interactions between RPA-associated proteins and Mec1/Tel1 specific substrates. Among them, multiple subunits of the chromatin remodeling complexes including ISW1, ISW2, INO80, SWR1, RSC and SWI/SNF are identified and they undergo DNA damage induced phosphorylation by Mec1 and Tel1. Taken together, this study greatly expands the existing knowledge of the targets of DNA damage checkpoint kinases and provides insights into the role of RPA-associated chromatins in mediating Mec1 and Tel1 substrate phosphorylation in vivo.

Reference Type
Journal Article
Authors
Chen SH, Albuquerque CP, Liang J, Suhandynata RT, Zhou H
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