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Prion: disease or relief?

Yury O Chernoff1

  • 1School of Biology and Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 310 Ferst Drive, Atlanta, GA 30332-0230, USA. yury.chernoff@biology.gatech.edu

Nature Cell Biology
|September 2, 2008
PubMed

Insights

Yeast prions, specifically the amyloid isoform of eRF3, influence programmed translational frameshifting. This process regulates cellular polyamine levels, but its adaptive or pathological role remains uncertain.

Area of Science:

  • Molecular biology
  • Yeast genetics

Background:

  • Prions are self-propagating protein isoforms.
  • Yeast translation termination factor eRF3 can form prions.
  • Prions can alter cellular processes.

Purpose of the Study:

  • To investigate the role of the eRF3 prion in yeast.
  • To understand how eRF3 prions affect translational control.
  • To determine the impact on cellular polyamine levels.

Main Methods:

  • Yeast genetics and molecular biology techniques.
  • Analysis of translational frameshifting.
  • Measurement of polyamine levels.

Main Results:

  • The eRF3 prion modulates programmed translational frameshifting.
  • This modulation impacts a regulatory circuit controlling polyamine levels.
  • The precise functional consequence (adaptive vs. pathological) is not yet defined.

Conclusions:

  • Yeast eRF3 prions influence gene expression through translational control.
  • This prion-mediated effect has downstream consequences on cellular metabolism.
  • Further research is needed to ascertain the adaptive or pathological significance of this phenomenon.

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