ER stress induces alternative nonproteasomal degradation of ER proteins but not of cytosolic ones.

Abstract excerpt

Inhibition of protein folding in the endoplasmic reticulum (ER) causes ER stress, which triggers the unfolded protein response (UPR). To decrease the biosynthetic burden on the ER, the UPR inhibits in its initial stages protein synthesis. At later stages it upregulates components of ER-associated degradation (ERAD) and of the ubiquitin/proteasome system, which targets ER as well as cytosolic proteins for...

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