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Old 11-24-2010, 10:03 PM
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Default NMR structure of the bovine prion protein isolated from healthy calf brains.

NMR structure of the bovine prion protein isolated from healthy calf brains.

Related Articles NMR structure of the bovine prion protein isolated from healthy calf brains.

EMBO Rep. 2004 Dec;5(12):1159-64

Authors: Hornemann S, Schorn C, Wüthrich K

NMR structures of recombinant prion proteins from various species expressed in Escherichia coli have been solved during the past years, but the fundamental question of the relevancy of these data relative to the naturally occurring forms of the prion protein has not been directly addressed. Here, we present a comparison of the cellular form of the bovine prion protein isolated and purified from healthy calf brains without use of detergents, so that it contains the two carbohydrate moieties and the part of the GPI anchor that is maintained after enzymatic cleavage of the glycerolipid moiety, with the recombinant bovine prion protein expressed in E. coli. We show by circular dichroism and (1)H-NMR spectroscopy that the three-dimensional structure and the thermal stability of the natural glycoprotein and the recombinant polypeptide are essentially identical. This result indicates possible functional roles of the glycosylation of prion proteins in healthy organisms, and provides a platform and validation for future work on the structural biology of prion proteins, which will have to rely primarily on the use of recombinant polypeptides.

PMID: 15568016 [PubMed - indexed for MEDLINE]



Source: PubMed
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