Prions represent an unusual structural form of a protein that is ‘infectious’. In mammals, prions are associated with fatal neurodegenerative diseases such as CJD (Creutzfeldt–Jakob disease), while in fungi they act as novel epigenetic regulators of phenotype. Even though most of the human prion diseases arise spontaneously, we still know remarkably little about how infectious prions form de novo. The [PSI+] prion of the yeast Saccharomyces cerevisiae provides a highly tractable model in which to explore the underlying mechanism of de novo prion formation, in particular identifying key cis- and trans-acting factors. Most significantly, the de novo formation of [PSI+] requires the presence of a second prion called [PIN+], which is typically the prion form of Rnq1p, a protein rich in glutamine and aspartic acid residues. The molecular mechanism by which the [PIN+] prion facilitates de novo [PSI+] formation is not fully established, but most probably involves some form of cross-seeding. A number of other cellular factors, in particular chaperones of the Hsp70 (heat-shock protein 70) family, are known to modify the frequency of de novo prion formation in yeast.
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October 2008
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Conference Article|
September 19 2008
Cellular factors important for the de novo formation of yeast prions
Mick Tuite;
Mick Tuite
1
1Protein Science Group, Department of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, U.K.
1To whom correspondence should be addressed (email [email protected]).
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Klement Stojanovski;
Klement Stojanovski
1Protein Science Group, Department of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, U.K.
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Frederique Ness;
Frederique Ness
1Protein Science Group, Department of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, U.K.
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Gloria Merritt;
Gloria Merritt
1Protein Science Group, Department of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, U.K.
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Nadejda Koloteva-Levine
Nadejda Koloteva-Levine
1Protein Science Group, Department of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, U.K.
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Publisher: Portland Press Ltd
Received:
April 08 2008
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© The Authors Journal compilation © 2008 Biochemical Society
2008
Biochem Soc Trans (2008) 36 (5): 1083–1087.
Article history
Received:
April 08 2008
Citation
Mick Tuite, Klement Stojanovski, Frederique Ness, Gloria Merritt, Nadejda Koloteva-Levine; Cellular factors important for the de novo formation of yeast prions. Biochem Soc Trans 1 October 2008; 36 (5): 1083–1087. doi: https://doi.org/10.1042/BST0361083
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