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lüll Substrate-specific mediators of ER associated degradation (ERAD) Brodsky JL; Wojcikiewicz RJCurr Opin Cell Biol 2009[Aug]; 21 (4): 516-21Approximately one-third of newly synthesized eukaryotic proteins are targeted to the secretory pathway, which is composed of an organellar network that houses the enzymes and maintains the chemical environment required for the maturation of secreted and membrane proteins. Nevertheless, this diverse group of proteins may fail to achieve their native states and are consequently selected for ER associated degradation (ERAD). Over the past few years, significant effort has been made to dissect the components of the core ERAD machinery that is responsible for the destruction of most ERAD substrates. Interestingly, however, some ERAD substrates associate with dedicated chaperone-like proteins that target them for proteolysis or protect them from destruction. Other substrates fold and function normally but can be selected for ERAD by protein adaptors that identify and transmit regulatory cues.|Animals[MESH]|Calcium/metabolism[MESH]|Cell Membrane/metabolism[MESH]|Endoplasmic Reticulum/*metabolism[MESH]|Fungi/metabolism[MESH]|Humans[MESH]|Hydroxymethylglutaryl CoA Reductases/metabolism[MESH]|Lipid Metabolism[MESH]|Models, Biological[MESH]|Proteasome Endopeptidase Complex/*metabolism[MESH]|Protein Binding[MESH]|Protein Folding[MESH]|Protein Transport[MESH]|Proteins/chemistry[MESH]|Solubility[MESH]|Substrate Specificity[MESH] |