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Splicing-dependent NMD does not require the EJC in Schizosaccharomyces pombe

Brogna, Saverjo and Wen, Jikai (2010) Splicing-dependent NMD does not require the EJC in Schizosaccharomyces pombe. The EMBO Journal, 29 (9). pp. 1537-1551.

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URL of Published Version: http://dx.doi.org/10.1038/emboj.2010.48.

Identification Number/DOI: 10.1038/emboj.2010.48.

Nonsense-mediated mRNA decay (NMD) is a translation-linked process that destroys mRNAs with premature translation termination codons (PTCs). In mammalian cells, NMD is also linked to pre-mRNA splicing, usually PTCs trigger strong NMD only when positioned upstream of at least one intron. The exon junction complex (EJC) is believed to mediate the link between splicing and NMD in these systems. Here, we report that in Schizosaccharomyces pombe splicing also enhances NMD, but against the EJC model prediction, an intron stimulated NMD regardless of whether it is positioned upstream or downstream of the PTC and EJC components are not required. Still the effect of splicing seems to be direct—we have found that the important NMD determinant is the proximity of an intron to the PTC, not just the occurrence of splicing. On the basis of these results, we propose a new model to explain how splicing could affect NMD.

Type of Work:Article
Date:May 2010 (Publication)
School/Faculty:Colleges (2008 onwards) > College of Life & Environmental Sciences
Department:Biosciences
Subjects:QR Microbiology
Institution:University of Birmingham
Copyright Holders:Nature Publishing
ID Code:399
Refereed:YES
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