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- W2134356523 abstract "Unfolded protein response (UPR) is a stress response to increased levels of unfolded proteins in the endoplasmic reticulum (ER). To deal with this stress, all eukaryotic cells share a well‐conserved strategy – the upregulation of chaperons and proteases to facilitate protein folding and to degrade the misfolded proteins. For metazoans, however, an additional and seemingly redundant strategy has been evolved – translation attenuation (TA) of proteins targeted to the ER via the protein kinase PERK pathway. PERK is essential in secretory cells, such as the pancreatic β ‐cells, but not in non‐secretory cell types. We have recently developed a mathematical model of UPR, focusing on the interplay and synergy between the TA arm and the conserved Ire1 arm of the UPR. The model showed that the TA mechanism is beneficial in highly fluctuating environment, for example, in the case where the ER stress changes frequently. Under highly variable levels of ER stress, tight regulation of the ER load by TA avoids excess amount of chaperons and proteases being produced. The model also showed that TA is of greater importance when there is a large flux of proteins through the ER. In this study, we further expand our model to investigate different types of ER stress and different temporal profiles of the stress. We found that TA is more desirable in dealing with the translation stress, for example, prolonged stimulation of proinsulin biosynthesis, than the chemical stress." @default.
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- W2134356523 date "2010-10-01" @default.
- W2134356523 modified "2023-09-25" @default.
- W2134356523 title "The unfolded protein response and translation attenuation: a modelling approach" @default.
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- W2134356523 doi "https://doi.org/10.1111/j.1463-1326.2010.01274.x" @default.
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