Chapter

Prion Proteins

Volume 305 of the series Topics in Current Chemistry pp 257-298

Date:

Fungal Prions: Structure, Function and Propagation

  • Mick F. TuiteAffiliated withKent Fungal Group, School of Biosciences, University of Kent Email author 
  • , Ricardo MarchanteAffiliated withKent Fungal Group, School of Biosciences, University of Kent
  • , Vitaly KushnirovAffiliated withRussian Cardiology Scientific Industrial Complex

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Abstract

Prions are not uniquely associated with rare fatal neurodegenerative diseases in the animal kingdom; prions are also found in fungi and in particular the yeast Saccharomyces cerevisiae. As with animal prions, fungal prions are proteins able to exist in one or more self-propagating alternative conformations, but show little primary sequence relationship with the mammalian prion protein PrP. Rather, fungal prions represent a relatively diverse collection of proteins that participate in key cellular processes such as transcription and translation. Upon switching to their prion form, these proteins can generate stable, sometimes beneficial, changes in the host cell phenotype. Much has already been learnt about prion structure, and propagation and de novo generation of the prion state through studies in yeast and these findings are reviewed here.

Keywords

Molecular chaperone Podospora anserina Prion Prion propagation Propagons Yeast (Saccharomyces cerevisiae)