Circular RNA is expressed across the eukaryotic tree of life.
Circular RNA is expressed across the eukaryotic tree of life.
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环状RNA在真核生命树中表达。
DOI:
10.1371/journal.pone.0090859
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Salzman J
中科院分区:
文献类型:
--
作者:
Wang PL;Bao Y;Yee MC;Barrett SP;Hogan GJ;Olsen MN;Dinneny JR;Brown PO;Salzman J
An unexpectedly large fraction of genes in metazoans (human, mouse, zebrafish, worm, fruit fly) express high levels of circularized RNAs containing canonical exons. Here we report that circular RNA isoforms are found in diverse species whose most recent common ancestor existed more than one billion years ago: fungi (Schizosaccharomyces pombe and Saccharomyces cerevisiae), a plant (Arabidopsis thaliana), and protists (Plasmodium falciparum and Dictyostelium discoideum). For all species studied to date, including those in this report, only a small fraction of the theoretically possible circular RNA isoforms from a given gene are actually observed. Unlike metazoans, Arabidopsis, D. discoideum, P. falciparum, S. cerevisiae, and S. pombe have very short introns (∼100 nucleotides or shorter), yet they still produce circular RNAs. A minority of genes in S. pombe and P. falciparum have documented examples of canonical alternative splicing, making it unlikely that all circular RNAs are by-products of alternative splicing or ‘piggyback’ on signals used in alternative RNA processing. In S. pombe, the relative abundance of circular to linear transcript isoforms changed in a gene-specific pattern during nitrogen starvation. Circular RNA may be an ancient, conserved feature of eukaryotic gene expression programs.
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影响因子:
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通讯作者:
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通讯作者:
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