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- W2133138889 abstract "The 3' untranslated region (UTR) of p53 mRNA contains two conserved U-rich sequences resembling cytoplasmic polyadenylation elements (CPE). It is not known if these sequences regulate p53 expression by post-transcriptional mechanisms.Stable p53 3'UTR reporter HaCaT skin and MCF-7 breast cancer cell lines were established. Quantitative PCR and an enzymatic assay were used to quantify the reporter mRNA and protein levels, respectively. Proteins binding to the CPEs were identified by RNA-immunoprecipitation (IP) and quantitative mass spectroscopy.The wild-type p53 3'UTR reduced mRNA steady state levels of the reporter gene and point mutations in the CPEs rescued the mRNA steady state levels in the MCF-7 cells, but not in the HaCaT cells. In both cell lines, the CPEs had a significant effect on translation of the reporter and influenced the effect of UV irradiation. Several proteins (including GAPDH, heterogeneous nuclear ribonucleoprotein (hnRNP) D and A/B) were identified from the MCF-7 cytoplasmic extracts that bound specifically to the CPEs.Two conserved CPEs in the p53 3'UTR regulate stability and translation of a reporter mRNA in non-irradiated as well as irradiated cells. GAPDH, hnRNP D and hnRNP A/B bind specifically to the p53 CPEs and could potentially be involved in the post-transcriptional regulation of p53." @default.
- W2133138889 created "2016-06-24" @default.
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- W2133138889 date "2008-11-28" @default.
- W2133138889 modified "2023-09-24" @default.
- W2133138889 title "Conserved CPEs in the p53 3' untranslated region influence mRNA stability and protein synthesis." @default.
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