Circular RNAs are the predominant transcript isoform from hundreds of human genes in diverse cell types.

Circular RNAs are the predominant transcript isoform from hundreds of human genes in diverse cell types.
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DOI:
10.1371/journal.pone.0030733
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Brown PO
Brown PO
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Salzman J;Gawad C;Wang PL;Lacayo N;Brown PO

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大多数人前mRNA被剪接成线性分子,其保留由基因组序列定义的外显子顺序。通过对来自各种正常和恶性人类细胞的RNA进行深度测序,我们发现了来自许多人类基因的RNA转录本,其中外显子以非规范顺序排列。统计估计和生物化学分析提供了强有力的证据,表明来自数百个基因的剪接转录物中有相当一部分是环状RNA。我们的研究结果表明,一个非典型的RNA剪接模式,导致在一个环状的RNA异构体,是人类细胞中的基因表达程序的一般特征。
Most human pre-mRNAs are spliced into linear molecules that retain the exon order defined by the genomic sequence. By deep sequencing of RNA from a variety of normal and malignant human cells, we found RNA transcripts from many human genes in which the exons were arranged in a non-canonical order. Statistical estimates and biochemical assays provided strong evidence that a substantial fraction of the spliced transcripts from hundreds of genes are circular RNAs. Our results suggest that a non-canonical mode of RNA splicing, resulting in a circular RNA isoform, is a general feature of the gene expression program in human cells.
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