One hundred million adenosine-to-inosine RNA editing sites: hearing through the noise.

One hundred million adenosine-to-inosine RNA editing sites: hearing through the noise.
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DOI:
10.1002/bies.201400055
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发表时间:
2014-08
期刊:
影响因子:
4
通讯作者:
Emeson, Ronald B.
Emeson, Ronald B.
中科院分区:
生物学3区
文献类型:
--
作者:
Ulbricht, Randi J.;Emeson, Ronald B.

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最近编译腺苷到肌苷 RNA 编辑事件的综合数据库的工作表明,RNA 编辑的潜力比以前想象的要普遍得多。事实上,它在主要位于人类转录组 Alu 重复元件内的 1 亿多个潜在编辑事件中得到了体现。在大量人类基因中发现了成对的反向 Alu 重复序列,转录时它们形成长双链 RNA 结构,作为 RNA 编辑酶的最佳底物。一小部分经过编辑的 Alu 元件已被证明在选择性剪接调节、miRNA 抑制和远端 RNA 编辑位点的顺式调节中表现出多种功能作用。其余大多数的低水平编辑可能是无功能的,但它们在灵长类基因组中的持久存在提供了适应性进化可能所需的增强的基因组灵活性。
The most recent work toward compiling a comprehensive database of adenosine-to-inosine RNA editing events suggests that the potential for RNA editing is much more pervasive than previously thought; indeed, it is manifest in more than 100 million potential editing events located primarily within Alu repeat elements of the human transcriptome. Pairs of inverted Alu repeats are found in a substantial number of human genes, and when transcribed, they form long double-stranded RNA structures that serve as optimal substrates for RNA editing enzymes. A small subset of edited Alu elements has been shown to exhibit diverse functional roles in the regulation of alternative splicing, miRNA repression and cis-regulation of distant RNA editing sites. The low level of editing for the remaining majority may be non-functional, yet their persistence in the primate genome provides enhanced genomic flexibility that may be required for adaptive evolution.
识别广泛的超编辑人类RNA。
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