Svf1 inhibits reactive oxygen species generation and promotes survival under conditions of oxidative stress in Saccharomyces cerevisiae Academic Article uri icon

Overview

MeSH Major

  • Oxidative Stress
  • Reactive Oxygen Species
  • Saccharomyces cerevisiae
  • Saccharomyces cerevisiae Proteins

abstract

  • Aberrant regulation of apoptosis, or programmed cell death, contributes to the aetiology of several diseases, including cancers, immunodeficiencies and neurodegenerative illnesses. We hypothesized that key features of mammalian cell death regulation may be conserved in single celled organisms such as the budding yeast Saccharomyces cerevisiae. We previously identified the yeast gene SVF1 in a screen for mutations that could be functionally complemented by exogenous expression of the human anti-apoptotic gene Bcl-x(L). Anti-apoptotic Bcl-2 family members have been shown to promote redox stability through upregulation of antioxidant pathways in mammalian cells. Here we demonstrate that the Svf1 protein is required for yeast survival under conditions of oxidative stress, including cold stress. Cells lacking SVF1 are hypersensitive to conditions associated with increased reactive oxygen species (ROS) generation and to direct chemical precursors of ROS, and demonstrate increased levels of ROS under these conditions. Hypersensitivity to oxidative stress can be reversed by treatment with the antioxidant N-acetylcysteine or expression of exogenous SVF1, although exogenous expression of Bcl-x(L) did not protect cells from cold stress. Exogenous SVF1 expression in mammalian cells confers resistance to H(2)O(2) exposure. Our data are consistent with previous observations suggesting a key role of oxidative stress response in mammalian apoptotic regulation and validate the use of S. cerevisiae as a model for studying programmed cell death.

publication date

  • June 2005

Research

keywords

  • Academic Article

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.1002/yea.1235

PubMed ID

  • 16034825

Additional Document Info

start page

  • 641

end page

  • 52

volume

  • 22

number

  • 8