Poly (C)-binding protein 1 regulates p63 expression through mRNA stability.

Poly (C)-binding protein 1 regulates p63 expression through mRNA stability.
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DOI:
10.1371/journal.pone.0071724
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Chen X
Chen X
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Cho SJ;Jung YS;Chen X

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p63是一种转录因子和p53家族蛋白,在多种上皮组织的肿瘤抑制和发展中起着至关重要的作用。虽然p63的表达主要是由翻译后修饰控制,但最近的研究表明,转录和转录后调节对于p63的正确表达是必不可少的。在此,我们研究了poly(C)-binding protein 1(PCBP 1,也称为hnRNP-E1和α CP 1)对p63表达的调节。我们发现PCBP 1的敲低降低了p63转录和蛋白的水平。我们还发现PCBP 1通过与p63 3 'UTR结合来调节p63 mRNA的稳定性。此外,我们发现p63 3 3′UTR中的富含铜的元件(CUE)与PCBP 1结合并对PCBP 1起反应。总之,我们得出结论,PCBP 1通过mRNA稳定性调节p63表达。
p63, a transcription factor and p53 family protein, plays a crucial role in tumor suppression and development of various epithelial tissues. While p63 expression is controlled mostly by post-translational modifications, recent studies indicate that transcriptional and posttranscriptional regulations are essential for proper p63 expression. Here, we investigated the regulation of p63 expression by poly (C)-binding protein 1 (PCBP1, also known as hnRNP-E1 and αCP1). We found that knockdown of PCBP1 decreases the level of p63 transcript and protein. We also found that PCBP1 regulates the stability of p63 mRNA via binding to p63 3’UTR. Additionally, we found that a CU-rich element (CUE) in p63 3′UTR is bound by and responsive to PCBP1. Together, we conclude that PCBP1 regulates p63 expression via mRNA stability.
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