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• W4309161821 endingPage "2719" @default.
• W4309161821 startingPage "2709" @default.
• W4309161821 abstract "The C-terminal region of the tumor suppressor protein p53 contains three domains, nuclear localization signal (NLS), tetramerization domain (TET), and C-terminal regulatory domain (CTD), which are essential for p53 function. Characterization of the structure and interactions of these domains within full-length p53 has been limited by the overall size and flexibility of the p53 tetramer. Using trans-intein splicing, we have generated full-length p53 constructs in which the C-terminal region is isotopically labeled with 15N for NMR analysis, allowing us to obtain atomic-level information on the C-terminal domains in the context of the full-length protein. Resonances of NLS and CTD residues have narrow linewidths, showing that these regions are largely solvent-exposed and dynamically disordered, whereas resonances from the folded TET are broadened beyond detection. Two regions of the CTD, spanning residues 369-374 and 381-388 and with high lysine content, make dynamic and sequence-independent interactions with DNA in regions that flank the p53 recognition element. The population of DNA-bound states increases as the length of the flanking regions is extended up to approximately 20 base pairs on either side of the recognition element. Acetylation of K372, K373, and K382, using a construct of the transcriptional coactivator CBP containing the TAZ2 and acetyltransferase domains, inhibits interaction of the CTD with DNA. This work provides high-resolution insights into the behavior of the intrinsically disordered C-terminal regions of p53 within the full-length tetramer and the molecular basis by which the CTD mediates DNA binding and specificity." @default.
• W4309161821 created "2022-11-24" @default.
• W4309161821 creator A5040124787 @default.
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• W4309161821 date "2022-11-16" @default.
• W4309161821 modified "2023-10-14" @default.
• W4309161821 title "Mapping Interactions of the Intrinsically Disordered C-Terminal Regions of Tetrameric p53 by Segmental Isotope Labeling and NMR" @default.
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• W4309161821 doi "https://doi.org/10.1021/acs.biochem.2c00528" @default.
• W4309161821 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36380579" @default.
• W4309161821 hasPublicationYear "2022" @default.
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