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Reconstituting the Mammalian Apoptotic Switch in Yeast

Peter Polčic1, Marek Mentel1

  • 1Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina CH-1, Ilkovičova 6, 84215 Bratislava, Slovakia.

Genes
|February 5, 2020
PubMed

Insights

The Bcl-2 family proteins control cell death by regulating mitochondrial outer membrane permeabilization. Yeast models effectively study these apoptotic regulators, aiding research into cell death mechanisms.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • The Bcl-2 family proteins are key regulators of apoptosis, controlling mitochondrial outer membrane permeabilization.
  • Proapoptotic and antiapoptotic members of this family have opposing roles in initiating or preventing programmed cell death.
  • The precise molecular mechanisms of Bcl-2 protein interactions with mitochondrial membranes are still debated.

Purpose of the Study:

  • To review the utility of yeast as a model system for studying Bcl-2 family protein function.
  • To discuss the application of yeast models in elucidating the mechanisms of both proapoptotic and antiapoptotic Bcl-2 proteins.
  • To highlight how yeast systems can help resolve disputes regarding Bcl-2 protein interactions.

Main Methods:

  • Utilizing yeast as a heterologous expression system for mammalian Bcl-2 family proteins.
  • Observing the effects of Bcl-2 proteins on yeast cell viability and mitochondrial function.
  • Analyzing protein-protein interactions and membrane binding properties within the yeast model.

Main Results:

  • Yeast expressing Bcl-2 family proteins recapitulate key aspects of apoptosis regulation seen in mammalian cells.
  • The yeast model allows for high-throughput screening and genetic manipulation to study Bcl-2 protein activity.
  • Studies in yeast have provided insights into the balance between proapoptotic and antiapoptotic Bcl-2 proteins.

Conclusions:

  • Yeast serves as a powerful and tractable model for dissecting the complex functions of Bcl-2 family proteins.
  • This model system facilitates the investigation of mitochondrial outer membrane permeabilization and apoptosis induction.
  • Further research using yeast can significantly advance our understanding of cell death pathways.
Keywords:
BH3-only proteinsBaxBcl-2 protein familyBcl-XLSaccharomyces cerevisiaeapoptosismitochondria

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