Selection of defective proteins possibly entails the prolonged association of such conformers with folding enzymes and their subsequent delivery to the receptors of the ERAD ubiquitin ligases
Selection of defective proteins possibly entails the prolonged association of such conformers with folding enzymes and their subsequent delivery to the receptors of the ERAD ubiquitin ligases. from the receptor Hrd3, which facilitates their delivery to downstream-acting components like Der1. == INTRO == Protein folding in the endoplasmic reticulum (ER) is error-prone, and even in unstressed cells, a considerable fraction of the secretory proteome will not attain its native conformation. Such defective conformers are selected by a protein quality control (PQC) system in the EMERGENY ROOM and dislocated into the cytoplasm, where they are decomposed by the ubiquitin proteasome system (Hirschet al., 2009; Brodsky, 2012; Ruggianoet al., 2014). This process is termed ER-associated protein degradation (ERAD). A key component of ERAD is the HMG-CoA reductase degradation ligase (HRD-ligase). This multimeric…