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Real-time Quaking-induced Conversion Assay for Detection of CWD Prions in Fecal Material
Published on: September 29, 2017
Sonication induced intermediate in prion protein conversion.
Audrius A Zukas1, Cathrin E Bruederle, John Mark Carter
1United States Department of Agriculture, Western Regional Research Center, Albany, CA, USA.
Protein and Peptide Letters
|February 22, 2008
Summary
Hamster prion protein (PrP(C)) changes shape with heat or sonication. Seeding this altered protein with the pathogenic prion form (PrP(Sc)) triggers conversion, suggesting a new intermediate prion protein conformer.
Area of Science:
- Biochemistry
- Neuroscience
- Structural Biology
Background:
- Prion diseases are linked to misfolded prion proteins.
- The normal prion protein (PrP(C)) can convert to a pathogenic isoform (PrP(Sc)).
- Understanding prion protein conformational changes is crucial for disease research.
Purpose of the Study:
- To investigate the conformational changes of hamster prion protein (PrP(C)).
- To explore the potential for a novel intermediate prion protein conformer.
- To understand the mechanism of PrP(C) to PrP(Sc) conversion.
Main Methods:
- Exposure of hamster PrP(C) to heat and sonication.
- Induction of conformational changes in PrP(C).
- Seeding of sonication-induced conformers with PrP(Sc).
Main Results:
- Hamster PrP(C) undergoes conformational changes upon heat or sonication.
- Sonication-induced PrP conformers convert to proteinase-resistant forms when seeded with PrP(Sc).
- Evidence suggests the existence of a third stable PrP conformer.
Conclusions:
- A third stable prion protein conformer may exist.
- This conformer could be an intermediate in the conversion of PrP(C) to PrP(Sc).
- Further research into this intermediate conformer may reveal new therapeutic targets for prion diseases.
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