Multiple products from microRNA transcripts.

Multiple products from microRNA transcripts.
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来自 microRNA 转录本的多种产品。

DOI:
10.1042/bst20130035
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发表时间:
2013
影响因子:
3.9
通讯作者:
Marco A
Marco A
中科院分区:
生物学3区
文献类型:
--
作者:
Marco A

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一个单独的转录本有时会编码一个以上的产品。在细菌和一些特殊的动物谱系中,许多基因被组织成操纵子:在单个多顺反子转录物中一起转录的开放阅读框架簇。然而,多顺反子转录物在真核生物中是罕见的。一个值得注意的例外是miRNA(microRNA),即在转录后水平调节基因表达的小RNA。miRNA的初级转录物通常通过至少三种不同的机制产生一种以上的功能产物。miRNA通常由多顺反子转录物与其他miRNA前体一起产生。此外,miRNAs通常来源于蛋白质编码基因内含子。最后,每个miRNA前体可以产生两个成熟的miRNA产物。我们认为,在本综述中,miRNA经常托管在编码多种产物的转录本中,因为在转录区域偶然出现的新的miRNA前体序列更有可能在进化过程中成为功能性miRNA。
A single transcript sometimes codes for more than one product. In bacteria, and in a few exceptional animal lineages, many genes are organized into operons: clusters of open reading frames that are transcribed together in a single polycistronic transcript. However, polycistronic transcripts are rare in eukaryotes. One notable exception is that of miRNAs (microRNAs), small RNAs that regulate gene expression at the post-transcriptional level. The primary transcripts of miRNAs commonly produce more than one functional product, by at least three different mechanisms. miRNAs are often produced from polycistronic transcripts together with other miRNA precursors. Also, miRNAs frequently derive from protein-coding gene introns. Finally, each miRNA precursor can produce two mature miRNA products. We argue, in the present review, that miRNAs are frequently hosted in transcripts coding for multiple products because new miRNA precursor sequences that arise by chance in transcribed regions are more likely to become functional miRNAs during evolution.
Let-7 microRNA家族的演变。
DOI: 10.4161/rna.18974
发表时间: 2012-03
期刊: RNA biology
影响因子: 4.1
作者:
Hertel J;Bartschat S;Wintsche A;Otto C;Students of the Bioinformatics Computer Lab;Stadler PF
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发表时间: 2011-11
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