Abstract
AbstractThe cellular prion protein (PrPC) is encoded by a chromosomal gene, and its scrapie isoform (PrPSc) features in all aspects of the prion diseases. Prior to the studies reported here, purification of PrPC has only been accomplished using immunoaffinity chromatography yielding small amounts of protein. Brain homogenates contain two PrPC forms designated PrPC‐I and ‐II. These proteins were purified from a microsomal fraction by detergent extraction and separated by immobilized Cu2+ ion affinity chromatography. PrPC‐II appears to be generated from PrPC‐I by limited proteolysis of the N‐terminus. Fractions enriched for PrPC‐I were purified further by cation‐exchange chromatography and sodium dodecyl sulfate‐polyacrylamide gel electrophoresis (SDS‐PAGE). Greater than 90% of the final product migrated as a broad band of Mr 33–35 kDa as judged by silver staining after SDS‐PAGE. Digestion of PrPC‐I with peptide‐N‐glycosidase (PNGase) compressed the band and shifted its mobility giving an Mr of 27 kDa. The protocol described should be amenable to large‐scale preparation of PrPC, enabling physical comparisons of PrPC and PrPSc.
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Dates
Type | When |
---|---|
Created | 16 years, 6 months ago (Feb. 9, 2009, 6:08 p.m.) |
Deposited | 1 year, 10 months ago (Sept. 27, 2023, 12:12 p.m.) |
Indexed | 3 months ago (May 21, 2025, 3:31 a.m.) |
Issued | 32 years, 10 months ago (Oct. 1, 1992) |
Published | 32 years, 10 months ago (Oct. 1, 1992) |
Published Online | 16 years, 7 months ago (Dec. 31, 2008) |
Published Print | 32 years, 10 months ago (Oct. 1, 1992) |
@article{Pan_1992, title={Purification and properties of the cellular prion protein from Syrian hamster brain}, volume={1}, ISSN={1469-896X}, url={http://dx.doi.org/10.1002/pro.5560011014}, DOI={10.1002/pro.5560011014}, number={10}, journal={Protein Science}, publisher={Wiley}, author={Pan, Keh‐Ming and Stahl, Neil and Prusiner, Stanley B.}, year={1992}, month=oct, pages={1343–1352} }