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- W2009040596 abstract "Promyelocytic leukemia nuclear bodies (PML NBs) are comprised of PML and a striking variety of its associated proteins. Various cellular functions have been attributed to PML NBs, including the regulation of gene expression. We report here that induced expression of PML recruits Sp1 into PML NBs, leading to the reduction of Sp1 transactivation function. Specifically, Chromatin immunoprecipitation (ChIP) assay demonstrated that induced expression of PML significantly diminishes the amount of Sp1 binding to its target gene promoter, immunofluorescence staining showed dramatic increase in the co-localization between PML and Sp1 upon induction of PML expression, moreover, PML and Sp1 co-fractionated in the core nuclear matrix. Our study further showed that PML promotes SUMOylation of Sp1 in a RING-motif-dependent manner, SUMOylation of Sp1 facilitates physical interaction between Sp1 and PML and recruitment of Sp1 into the PML NBs, the SUMO binding motif of PML was also important for its interaction with Sp1. The results of this study demonstrate a novel mechanism by which PML regulates gene expression through sequestration of the transcription factor into PML NBs." @default.
- W2009040596 created "2016-06-24" @default.
- W2009040596 creator A5001292694 @default.
- W2009040596 creator A5006170430 @default.
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- W2009040596 date "2014-04-11" @default.
- W2009040596 modified "2023-10-04" @default.
- W2009040596 title "Inhibition of Sp1 Functions by Its Sequestration into PML Nuclear Bodies" @default.
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- W2009040596 doi "https://doi.org/10.1371/journal.pone.0094450" @default.
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