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    Cytoplasmic polyadenylation element binding protein 1 (CPEB1) regulates polyadenylation and subsequent translation of CPE-containing mRNAs involved in various physiological and pathological phenomena. Although the significance of CPEB1-mediated translational regulation has recently been reported, the detailed regulatory mechanism of Cpeb1 expression remains unclear. To elucidate the post-transcriptional regulatory mechanisms of Cpeb1 expression, we constructed reporter plasmids containing various deletions or mutations in the Cpeb1 mRNA 3' untranslated region (3'UTR). We investigated their expression levels in Neuro2a neuroblastoma cells. We found that Cpeb1 expression is regulated through an AU-rich element in its 3'UTR. Furthermore, the mRNA decay factor AU-rich binding factor 1 (AUF1) regulates Cpeb1 expression, and knockdown of AUF1 upregulates Cpeb1 mRNA expression but results in a decrease in CPEB1 protein levels. These findings indicate that AUF1 has a discordant role in the expression of Cpeb1. Copyright © 2020 Elsevier Inc. All rights reserved.

    Citation

    Souichi Oe, Taro Koike, Yukie Hirahara, Susumu Tanaka, Shinichi Hayashi, Yosuke Nakano, Masahiko Kase, Yasuko Noda, Hisao Yamada, Masaaki Kitada. AUF1, an mRNA decay factor, has a discordant role in Cpeb1 expression. Biochemical and biophysical research communications. 2021 Jan 01;534:491-497

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    PMID: 33220927

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