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Protein disulfide isomerases (PDIs) are enzymes that mediate oxidative protein folding in the endoplasmic reticulum. Understanding of PDIs has historically been hampered by lack of structural information. Over the last several years, partial and full‐length PDI structures have been solved at an increasing rate. Analysis of the structures reveals common features shared by several of the best known...
The endoplasmic reticulum (ER) is the major folding compartment for secreted and membrane proteins and is the site of a specific chaperone system, the calnexin cycle, for folding N‐glycosylated proteins. Recent structures of components of the calnexin cycle have deepened our understanding of quality control mechanisms and protein folding pathways in the ER. In the calnexin cycle, proteins carrying...
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