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    Biochim Biophys Acta. 2004 Jun 1;1699(1-2):35-44.

    Protein disulfide isomerase.

    Wilkinson B, Gilbert HF.

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    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.

    Abstract

    During the maturation of extracellular proteins, disulfide bonds that chemically cross-link specific cysteines are often added to stabilize a protein or to join it covalently to other proteins. Disulfide formation, which requires a change in the covalent structure of the protein, occurs as the protein folds into its three-dimensional structure. In the eukaryotic endoplasmic reticulum and in the bacterial periplasm, an elaborate system of chaperones and folding catalysts ensure that disulfides connect the proper cysteines and that the folding protein does not make improper interactions. This review focuses specifically on one of these folding assistants, protein disulfide isomerase (PDI), an enzyme that catalyzes disulfide formation and isomerization and a chaperone that inhibits aggregation.

    PMID:
    15158710
    [PubMed - indexed for MEDLINE]

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