Cytoplasmic intron retention, function, splicing, and the sentinel RNA hypothesis.

Cytoplasmic intron retention, function, splicing, and the sentinel RNA hypothesis.
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DOI:
10.1002/wrna.1203
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发表时间:
2014-03
影响因子:
7.3
通讯作者:
Eberwine, James
Eberwine, James
中科院分区:
生物学2区
文献类型:
--
作者:
Buckley, Peter T.;Khaladkar, Mugdha;Kim, Junhyong;Eberwine, James

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细胞质剪接代表了一个新出现的转录调节水平,增加了哺乳动物细胞的分子多样性。随着这种非规范形式的转录物加工的例子被发现,它对正常细胞功能的重要性的证据越来越多。来自使用各种细胞类型的许多小组的工作正在稳步鉴定大量转录本(并且很快会更大,因为目前正在进行许多细胞表型中保留内含子的全基因组分析),这些转录本经历一定水平的调节内源性胞核剪接作为其正常生物合成途径的一部分。在这里,我们回顾了现有的数据,包括细胞质保留内含子序列,并建议,这样的序列可能是一个组成部分的“哨兵RNA”,用于产生转录变体的细胞质内,以及基于RNA的二级消息的来源。
Cytoplasmic splicing represents a newly emerging level of transcriptional regulation adding to the molecular diversity of mammalian cells. As examples of this noncanonical form of transcript processing are discovered, the evidence of its importance to normal cellular function grows. Work from a number of groups using a variety of cell types is steadily identifying a large number of transcripts (and soon to be even larger as genome-wide analyses of retained introns across a number of cellular phenotypes are currently underway) that undergo some level of regulated endogenous extranuclear splicing as part of their normal biosynthetic pathway. Here, we review the existing data covering cytoplasmic retained intron sequences and suggest that such sequences may be a component of `sentinel RNA' that serves to generate transcript variants within the cytoplasm as well as a source for RNA-based secondary messages.
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