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Fungal prions

Gemma L Staniforth1, Mick F Tuite

  • 1Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, Kent, United Kingdom.

Progress in Molecular Biology and Translational Science
|April 10, 2012
PubMed

Insights

Fungal prions, unlike their mammalian counterparts, act as epigenetic regulators, offering phenotypic plasticity and potential growth advantages. These protein-only infectious agents in yeast can influence heritable traits without causing disease.

Area of Science:

  • Biochemistry
  • Genetics
  • Molecular Biology

Background:

  • Prion proteins in mammals and fungi share conformational templating mechanisms for protein-only infectivity.
  • Mammalian prion conversion leads to disease, while fungal prions can act as epigenetic regulators.
  • Fungal prions, particularly in yeast, can provide phenotypic plasticity and a growth advantage under environmental stress.

Purpose of the Study:

  • To introduce the biochemical and genetic properties of fungal prions.
  • To highlight the shared characteristics between fungal and mammalian prion proteins (PrP).
  • To outline the contributions of fungal prion studies to the broader field of prion biology.

Main Methods:

  • Biochemical characterization of fungal prion proteins.
  • Genetic analysis of prion inheritance and function in yeast.
  • Comparative studies between fungal and mammalian prion systems.

Main Results:

  • Fungal prions exhibit conformational templating similar to mammalian PrP.
  • Fungal prions function as epigenetic regulators, influencing heritable phenotypes.
  • [PRION(+)] state in yeast offers phenotypic plasticity and potential growth advantages.
  • Studies reveal diverse and metabolically significant cellular functions affected by yeast prions.

Conclusions:

  • Fungal prions, though rarely found, represent a functional state in yeast with significant implications for inheritance and adaptation.
  • Shared biochemical and genetic properties underscore the importance of studying fungal prions for understanding prion biology broadly.
  • Fungal prion research offers insights into epigenetic regulation and phenotypic evolution.

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