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- W2023603668 abstract "In this report, we describe the phosphorylation of Yin Yang 1 (YY1) in vitro and in vivo by CK2α (casein kinase II), a multifunctional serine/threonine protein kinase. YY1 is a ubiquitously expressed multifunctional zinc finger transcription factor implicated in regulation of many cellular and viral genes. The products of these genes are associated with cell growth, the cell cycle, development, and differentiation. Numerous studies have linked YY1 to tumorigenesis and apoptosis. YY1 is a target for cleavage by caspases in vitro and in vivo as well, but very little is known about the mechanisms that regulate its cleavage during apoptosis. Here, we identify serine 118 in the transactivation domain of YY1 as the site of CK2α phosphorylation, proximal to a caspase 7 cleavage site. CK2α inhibitors, as well as knockdown of CK2α by small interfering RNA, reduce S118 phosphorylation in vivo and enhance YY1 cleavage under apoptotic conditions, whereas increased CK2α activity by overexpression in vivo elevates S118 phosphorylation. A serine-to-alanine substitution at serine 118 also increases the cleavage of YY1 during apoptosis compared to wild-type YY1. Taken together, we have discovered a regulatory link between YY1 phosphorylation at serine 118 and regulation of its cleavage during programmed cell death." @default.
- W2023603668 created "2016-06-24" @default.
- W2023603668 creator A5013708533 @default.
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- W2023603668 creator A5080975332 @default.
- W2023603668 date "2012-02-01" @default.
- W2023603668 modified "2023-10-15" @default.
- W2023603668 title "Phosphorylation of the Transcription Factor YY1 by CK2<i>α</i> Prevents Cleavage by Caspase 7 during Apoptosis" @default.
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- W2023603668 doi "https://doi.org/10.1128/mcb.06466-11" @default.
- W2023603668 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3272974" @default.
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- W2023603668 hasPublicationYear "2012" @default.
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