The role of rafts in the fibrillization and aggregation of prions

Chemistry and Physics of Lipids
Teresa J T Pinheiro

Abstract

A key molecular event in prion diseases is the conversion of the prion protein (PrP) from its normal cellular form (PrP(C)) to the disease-specific form (PrP(Sc)). The transition from PrP(C) to PrP(Sc) involves a major conformational change, resulting in amorphous aggregates and/or fibrillar amyloid deposits. Here several lines of evidence implicating membranes in the conversion of PrP are reviewed with a particular emphasis on the role of lipid rafts in the conformational transition of prion proteins. New correlations between in vitro biophysical studies and findings from cell biology work on the role of rafts in prion conversion are highlighted and a mechanism for the role of rafts in prion conversion is proposed.

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