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Regulation of ATM/DNA-PKcs Phosphorylation by BRCA1-Associated BAAT1

By Mutsuko Ouchi and Toru Ouchi


BRCA1 has been implicated in the DNA damage pathway and regulation of genome stability, however, it does not contain intrinsic catalytic activity to repair the DNA lesions. Thus, a potential activity of BRCA1 is to assemble proteins that sense DNA damage and to transduce checkpoint signals to downstream. We have recently isolated a protein termed BAAT1, which binds to BRCA1, ATM, DNA-PKcs, and SMC1. Phosphorylation of ATM/DNA-PKcs is greatly reduced in BAAT1-knockdown cells, suggesting that sensing of DNA lesions mediated by BRCA1/BAAT1 is critical for activation of these kinases

Topics: Monographs
Publisher: SAGE Publications
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Provided by: PubMed Central
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