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    Protein Sci. 1995 Dec;4(12):2587-93.

    Nuclear magnetic resonance characterization of the N-terminal thioredoxin-like domain of protein disulfide isomerase.

    Kemmink J, Darby NJ, Dijkstra K, Scheek RM, Creighton TE.

    European Molecular Biology Laboratory, Heidelberg, Germany.

    A genetically engineered protein consisting of the 120 residues at the N-terminus of human protein disulfide isomerase (PDI) has been characterized by 1H, 13C, and 15N NMR methods. The sequence of this protein is 35% identical to Escherichia coli thioredoxin, and it has been found also to have similar patterns of secondary structure and beta-sheet topology. The results confirm that PDI is a modular, multidomain protein. The last 20 residues of the N-terminal domain of PDI are some of those that are similar to part of the estrogen receptor, yet they appear to be an intrinsic part of the thioredoxin fold. This observation makes it unlikely that any of the segments of PDI with similarities to the estrogen receptor comprise individual domains.

    PMID: 8580850 [PubMed - indexed for MEDLINE]

    PMCID: 2143042

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