PolyA tracks, polybasic peptides, poly-translational hurdles.

PolyA tracks, polybasic peptides, poly-translational hurdles.
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DOI:
10.1002/wrna.1486
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发表时间:
2018-09
期刊:
Wiley interdisciplinary reviews. RNA
影响因子:
--
通讯作者:
Djuranovic S
Djuranovic S
中科院分区:
其他
文献类型:
--
作者:
Arthur LL;Djuranovic S

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The abundance of mRNA is one of the major determinants of protein synthesis. As such, factors that influence mRNA stability often contribute to gene regulation. Polyadenylation of the 3’ end of mRNA transcripts, the poly(A) tail, has long been recognized as one of these regulatory elements given its influence on translation efficiency and mRNA stability. Unwanted translation of the poly(A) tail signals to the cell an aberrant polyadenylation event or the lack of stop codons which makes this sequence an important element in translation fidelity and mRNA surveillance response. Consequently, investigations into the effects of the poly(A) tail lead to the discoveries that poly-lysine as well as other poly-basic peptide sequences and, to a much greater extent, polyA mRNA sequences within the open reading frame influence mRNA stability and translational efficiency. Conservation and evolutionary selection of codon usage in polyA track sequences across multiple organisms suggests a biological significance for coding polyA tracks in the regulation of gene expression. Here we discuss the cellular responses and consequences of coding polyA track translation and synthesis of polybasic peptides.
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