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2004:
Kim Chinpal; Morré D James
Prion proteins and ECTO-NOX proteins exhibit similar oscillating redox activities.
Biochemical and biophysical research communications 2004;
315(
4):.
Both recombinant full-length mouse prion protein expressed in Escherichia coli and native prion protein (PrPsc) from mouse brain exhibited NADH oxidase and protein disulfide-thiol interchange activities similar to those formerly thought to be properties exclusive to the growth-related, cell surface ECTO-NOX proteins. The two activities exhibited the complex 2+3 pattern of oscillations characteristic of ECTO-NOX proteins where the two activities alternate to generate a period length of 24 min. The oscillations were augmented by copper and diminished by addition of the copper chelator bathocuproene. That the activity might be attributable to a contaminating protein was ruled out by experiments where the purified recombinant prion-containing extracts were resolved by SDS-PAGE and the activity was restricted to a single band corresponding to the predicted Mr of the recombinant prion as verified by Western blot analyses.
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