Abstract
The 3′ untranslated region of human p53 mRNA represses translation both in vitro and in vivo. Here, we identify a cis-acting 66-nucleotide U-rich sequence in the human p53 mRNA 3′ untranslated region that mediates translational repression. Using UV cross-linking, we detect a 40 kDa protein that interacts specifically with the p53 3′UTR containing the repressor element. Enhanced translation of p53 mRNA contributes to the accumulation of p53 protein in cells exposed to γ-radiation and could be a consequence of relieving the inhibition mediated by the repressor element.
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Acknowledgements
We thank Michael Wormington for providing us with the pSP65AT plasmid, and Barbara Stebbins-Boaz and Joel Richter for suggestions and advice with the UV cross-linking assay. We also wish to thank Yunping Lin, Homayoun Vaziri and John Kim for critical reading of the manuscript. This work was supported by the National Cancer Institute of Canada and the Medical Research Council of Canada.
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Fu, L., Ma, W. & Benchimol, S. A translation repressor element resides in the 3′ untranslated region of human p53 mRNA. Oncogene 18, 6419–6424 (1999). https://doi.org/10.1038/sj.onc.1203064
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DOI: https://doi.org/10.1038/sj.onc.1203064
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