Ribosome Collisions Result in +1 Frameshifting in the Absence of No-Go Decay
| Autor: | Jessica K. Qiu, Carrie L. Simms, Hani S. Zaher, Liewei L. Yan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Quality Control Ribosomal Proteins Saccharomyces cerevisiae Proteins RNA Stability Saccharomyces cerevisiae Ribosome General Biochemistry Genetics and Molecular Biology Article Frameshift mutation 03 medical and health sciences Open Reading Frames 0302 clinical medicine Protein biosynthesis Coding region RNA Messenger lcsh:QH301-705.5 Physics Messenger RNA Frameshifting Ribosomal Translation (biology) RNA Fungal Ribosomal RNA mRNA surveillance Cell biology 030104 developmental biology lcsh:Biology (General) Protein Biosynthesis Ribosomes 030217 neurology & neurosurgery |
| Zdroj: | Cell reports Cell Reports, Vol 28, Iss 7, Pp 1679-1689.e4 (2019) |
| ISSN: | 2211-1247 |
| Popis: | SUMMARY During translation, an mRNA is typically occupied by multiple ribosomes sparsely distributed across the coding sequence. This distribution, mediated by slow rates of initiation relative to elongation, ensures that they rarely collide with each other, but given the stochastic nature of protein synthesis, collision events do occur. Recent work from our lab suggested that collisions signal for mRNA degradation through no-go decay (NGD). We have explored the impact of stalling on ribosome function when NGD is compromised and found it to result in +1 frameshifting. We used reporters that limit the number of ribosomes on a transcript to show that +1 frameshifting is induced through ribosome collision in yeast and bacteria. Furthermore, we observe a positive correlation between ribosome density and frameshifting efficiency. It is thus tempting to speculate that NGD, in addition to its role in mRNA quality control, evolved to cope with stochastic collision events to prevent deleterious frameshifting events. In Brief Ribosome collisions, resulting from stalling, activate quality control processes to degrade the aberrant mRNA and the incomplete peptide. mRNA degradation proceeds through an endonucleolytic cleavage between the stacked ribosomes, which resolves the collisions. Simms et al. show that, when cleavage is inhibited, colliding ribosomes move out of frame. Graphical Abstract |
| Databáze: | OpenAIRE |
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