Function of yeast and amphioxus tRNA ligase in IRE1alpha-dependent XBP1 mRNA splicing
Biochemical and Biophysical Research Communications, ISSN: 0006-291X, Vol: 413, Issue: 4, Page: 527-531
2011
- 11Citations
- 24Captures
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Metrics Details
- Citations11
- Citation Indexes11
- 11
- CrossRef8
- Captures24
- Readers24
- 24
Article Description
During their maturation step, transfer RNAs (tRNAs) undergo excision of their introns by specific splicing. Although tRNA splicing is a molecular event observed in all domains of life, the machinery of the ligation reaction has diverged during evolution. Yeast tRNA ligase 1 (TRL1) is a multifunctional protein that alone catalyzes RNA ligation in tRNA splicing, whereas three molecules [RNA ligase (RNL), Clp1, and PNK/CPDase] are necessary for RNA ligation in tRNA splicing in amphioxi. RNA ligation not only occurs in tRNA splicing, but also in yeast HAC1 mRNA splicing and in animal X-box binding protein 1 (XBP1) mRNA splicing under conditions of endoplasmic reticulum (ER) stress. Yeast TRL1 is known to function as an RNA ligase for HAC1 mRNA splicing, whereas the RNA ligase for XBP1 mRNA splicing is unknown in animals. We examined whether yeast and amphioxus RNA ligases for tRNA splicing function in RNA ligation in mammalian XBP1 splicing. Both RNA ligases functioned in RNA ligation in mammalian XBP1 splicing in vitro. Interestingly, Clp1, and PNK/CPDase were not necessary for exon–exon ligation in XBP1 mRNA by amphioxus RNL. These results suggest that RNA ligase for tRNA splicing might therefore commonly function as an RNA ligase for XBP1 mRNA splicing.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0006291X11015488; http://dx.doi.org/10.1016/j.bbrc.2011.08.129; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=80053601699&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/21924241; https://linkinghub.elsevier.com/retrieve/pii/S0006291X11015488; https://dx.doi.org/10.1016/j.bbrc.2011.08.129
Elsevier BV
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