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- W2077804546 endingPage "10604" @default.
- W2077804546 startingPage "10596" @default.
- W2077804546 abstract "The Herpes Simplex Virion Protein 16 (VP16) activates transcription through a series of protein/protein interactions involving its highly acidic transactivation domain (TAD). The acidic TAD of VP16 (VP16TAD) has been shown to interact with several partner proteins both in vitro and in vivo, and many of these VP16 partners also bind the acidic TAD of the mammalian tumor suppressor protein p53. For example, the TADs of VP16 and p53 (p53TAD) both interact directly with the p62/Tfb1 (human/yeast) subunit of TFIIH, and this interaction correlates with their ability to activate both the initiation and elongation phase of transcription. In this manuscript, we use NMR spectroscopy, isothermal titration calorimetery (ITC) and site-directed mutagenesis studies to characterize the interaction between the VP16TAD and Tfb1. We identify a region within the carboxyl-terminal subdomain of the VP16TAD (VP16C) that has sequence similarity with p53TAD2 and binds Tfb1 with nanomolar affinity. We determine an NMR structure of a Tfb1/VP16C complex, which represents the first high-resolution structure of the VP16TAD in complex with a target protein. The structure demonstrates that like p53TAD2, VP16C forms a 9-residue α-helix in complex with Tfb1. Comparison of the VP16/Tfb1and p53/Tfb1 structures clearly demonstrates how the viral activator VP16C and p53TAD2 shares numerous aspects of binding to Tfb1. Despite the similarities, important differences are observed between the p53TAD2/Tfb1 and VP16C/Tfb1 complexes, and these differences demonstrate how selected activators such as p53 depend on phosphorylation events to selectively regulate transcription." @default.
- W2077804546 created "2016-06-24" @default.
- W2077804546 creator A5004109558 @default.
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- W2077804546 creator A5024887234 @default.
- W2077804546 creator A5051955080 @default.
- W2077804546 creator A5070289824 @default.
- W2077804546 creator A5089853419 @default.
- W2077804546 date "2008-07-17" @default.
- W2077804546 modified "2023-10-04" @default.
- W2077804546 title "NMR Structure of the Complex between the Tfb1 Subunit of TFIIH and the Activation Domain of VP16: Structural Similarities between VP16 and p53" @default.
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- W2077804546 doi "https://doi.org/10.1021/ja800975h" @default.
- W2077804546 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18630911" @default.
- W2077804546 hasPublicationYear "2008" @default.
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