Abstract
Protein-folding homeostasis in the endoplasmic reticulum (ER) is maintained by the unfolded protein response (UPR). UPR in Saccharomyces cerevisiae is regulated by a bZIP transcription factor, Hac1p. Under non-stress condition, HAC1 mRNA is translationally repressed. When un- or mis-folded proteins accumulate in the ER, HAC1 mRNA undergoes non-conventional mRNA splicing. The spliced HAC1 mRNA is translationally active and produces functional Hac1p, which initiates a transcriptional response that restores ER protein-folding homeostasis. Thus, the activation of yeast UPR is tightly regulated by HAC1 mRNA splicing. Here, we describe two methods that are used to monitor the splicing and translational status of HAC1 mRNA in budding yeast.
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Acknowledgments
The authors would like to thank Peter Walter for valuable discussions and scientific guidance.
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Li, W., Singer, R.H. (2022). Detecting the Non-conventional mRNA Splicing and Translational Activation of HAC1 in Budding Yeast. In: Pérez-Torrado, R. (eds) The Unfolded Protein Response. Methods in Molecular Biology, vol 2378. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-1732-8_8
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DOI: https://doi.org/10.1007/978-1-0716-1732-8_8
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