ICE1 promotes the link between splicing and nonsense-mediated mRNA decay

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ICE1 promotes the link between splicing and nonsense-mediated mRNA decay.

The nonsense-mediated mRNA decay (NMD) pathway detects aberrant transcripts containing premature termination codons (PTCs) and regulates expression of 5-10% of non-aberrant human mRNAs. To date, most proteins involved in NMD have been identified by genetic screens in model organisms; however, the increased complexity of gene expression regulation in human cells suggests that additional proteins...

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The coupling of alternative splicing and nonsense-mediated mRNA decay.

Most human genes exhibit alternative splicing, but not all alternatively spliced transcripts produce functional proteins. Computational and experimental results indicate that a substantial fraction of alternative splicing events in humans result in mRNA isoforms that harbor a premature termination codon (PTC). These transcripts are predicted to be degraded by the nonsense-mediated mRNA decay (N...

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Nonsense-mediated mRNA decay.

Translation and mRNA decay are coupled processes; the link is most obvious in the case of NMD (nonsense-mediated mRNA decay). NMD is a mechanism that drastically reduces the level of mRNA harbouring PTCs (premature translation termination codons). The defining event in NMD is premature translation termination and the key question is: what distinguishes premature from normal translation terminat...

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Nonsense-mediated mRNA decay

Is it important? Absolutely! NMD probably evolved to eliminate abnormal transcripts due to routine errors in gene expression. For example, inefficient or inaccurate pre-mRNA splicing can generate an intron-derived in frame nonsense codon, or a shift in the reading frame and an exon-derived nonsense codon downstream of the shift. There are also natural substrates for NMD such as alternatively sp...

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ژورنال

عنوان ژورنال: eLife

سال: 2018

ISSN: 2050-084X

DOI: 10.7554/elife.33178