Abstract
One of the mysteries in prion research is the structure of the infectious form of mammalian prion protein PrPSc. Here we used mass spectrometry analysis of hydrogen-deuterium exchange to examine brain-derived PrPSc. Our data indicate that, contrary to popular models, prion-protein conversion involves refolding of the entire region from residue ~80–90 to the C-terminus, which in PrPSc consists of β-strands and relatively short turns and/or loops, with no native α-helices present.
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Acknowledgements
This study was supported by US National Institutes of Health grants NS44158, NS38604 and AG14359, and by the Intramural Research Program of the National Institute of Allergy and Infectious Diseases.
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V.S. conducted and analyzed H/D exchange experiments. G.J.R. and D.K.O. did all animal-associated work, from animal inoculations to dissection of brain tissue. G.S.B., D.K.O. and G.J.R. prepared PrPSc samples and carried out their biochemical characterization. B.C. did FTIR experiments. W.K.S. wrote the manuscript and coordinated the entire project. G.S.B., V.S. and B.C. discussed the results and revised the manuscript.
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Smirnovas, V., Baron, G., Offerdahl, D. et al. Structural organization of brain-derived mammalian prions examined by hydrogen-deuterium exchange. Nat Struct Mol Biol 18, 504–506 (2011). https://doi.org/10.1038/nsmb.2035
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DOI: https://doi.org/10.1038/nsmb.2035
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