Abstract
The pathology of human prion diseases is affected by polymorphism at amino acid residue 129 of the prion protein gene. Recombinant mouse prion proteins mimicking either form of the polymorphism were prepared to examine their effect on the conformation and the level of superoxide dismutase (SOD) activity of the prion protein. Following the binding of copper atoms to prion protein, antibody mapping and CD analysis detected conformational differences between the two forms of protein. However, neither the level of copper binding nor the level of SOD activity associated with this form of prion protein altered with the identity of codon 129. These results suggest that in the holo-metal binding form of the protein, prion structure but not its SOD activity is affected by polymorphism at codon 129.
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