Nanopore sequencing reveals endogenous NMD-targeted isoforms in human cells.
Nanopore sequencing reveals endogenous NMD-targeted isoforms in human cells.
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DOI:
10.1186/s13059-021-02439-3
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发表时间:
2021-08-13
期刊:
影响因子:
12.3
通讯作者:
Mühlemann O
中科院分区:
文献类型:
--
作者:
Karousis ED;Gypas F;Zavolan M;Mühlemann O
Nonsense-mediated mRNA decay (NMD) is a eukaryotic, translation-dependent degradation pathway that targets mRNAs with premature termination codons and also regulates the expression of some mRNAs that encode full-length proteins. Although many genes express NMD-sensitive transcripts, identifying them based on short-read sequencing data remains a challenge. To identify and analyze endogenous targets of NMD, we apply cDNA Nanopore sequencing and short-read sequencing to human cells with varying expression levels of NMD factors. Our approach detects full-length NMD substrates that are highly unstable and increase in levels or even only appear when NMD is inhibited. Among the many new NMD-targeted isoforms that our analysis identifies, most derive from alternative exon usage. The isoform-aware analysis reveals many genes with significant changes in splicing but no significant changes in overall expression levels upon NMD knockdown. NMD-sensitive mRNAs have more exons in the 3΄UTR and, for those mRNAs with a termination codon in the last exon, the length of the 3΄UTR per se does not correlate with NMD sensitivity. Analysis of splicing signals reveals isoforms where NMD has been co-opted in the regulation of gene expression, though the main function of NMD seems to be ridding the transcriptome of isoforms resulting from spurious splicing events. Long-read sequencing enables the identification of many novel NMD-sensitive mRNAs and reveals both known and unexpected features concerning their biogenesis and their biological role. Our data provide a highly valuable resource of human NMD transcript targets for future genomic and transcriptomic applications. The online version contains supplementary material available at 10.1186/s13059-021-02439-3.
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DOI:
10.1093/database/bas014
发表时间:
2012
期刊:
Database : the journal of biological databases and curation
影响因子:
--
作者:
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Bioinformatics (Oxford, England)
影响因子:
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通讯作者:
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影响因子:
64.5
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影响因子:
4.5
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DOI:
10.1093/bioinformatics/btp163
发表时间:
2009-06-01
期刊:
Bioinformatics (Oxford, England)
影响因子:
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de Hoon MJ