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- W2894539085 abstract "Abstract p53 is an intrinsically disordered protein with a large number of post-translational modifications and interacting partners. The hierarchical order and subcellular location of these events are still poorly understood. The activation of p53 during the DNA damage response (DDR) requires a switch in the activity of the E3 ubiquitin ligase MDM2 from a negative to a positive regulator of p53. This is mediated by the ATM kinase that regulates the binding of MDM2 to the p53 mRNA facilitating an increase in p53 synthesis. Here we show that the binding of MDM2 to the p53 mRNA brings ATM to the p53 polysome where it phosphorylates the nascent p53 at serine 15 and prevents MDM2-mediated degradation of p53. A single synonymous mutation in p53 codon 22 (L22L) prevents the phosphorylation of the nascent p53 protein and the stabilization of p53 following genotoxic stress. The ATM trafficking from the nucleus to the p53 polysome is mediated by MDM2, which requires its interaction with the ribosomal proteins RPL5 and RPL11. These results show how the ATM kinase phosphorylates the p53 protein while it is being synthesized and offer a novel mechanism whereby a single synonymous mutation controls the stability and activity of the encoded protein." @default.
- W2894539085 created "2018-10-05" @default.
- W2894539085 creator A5000835101 @default.
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- W2894539085 date "2018-09-24" @default.
- W2894539085 modified "2023-10-14" @default.
- W2894539085 title "A single synonymous mutation determines the phosphorylation and stability of the nascent protein" @default.
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- W2894539085 doi "https://doi.org/10.1093/jmcb/mjy049" @default.
- W2894539085 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6734142" @default.
- W2894539085 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30252118" @default.
- W2894539085 hasPublicationYear "2018" @default.
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