Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
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Glutathione Content and the Activities of Glutathione-Synthesizing Enzymes in Fission Yeast are Modulated by Oxidative Stress

  • Lee, Yuk-Young (Division of Life Sciences, Kangwon National University) ;
  • Kim, Su-Jung (Division of Life Sciences, Kangwon National University) ;
  • Park, Eun-Hee (College of Pharmacy, Sookmyung Womens University) ;
  • Lim, Chang-Jin (Division of Life Sciences, Kangwon National University)
  • Published : 2003.09.01
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Abstract

Glutathione (GSH) is an important factor in determining tolerance against oxidative stress in living organisms. It is synthesized in two sequential reactions catalyzed by ${\gamma}$-glutamylcysteine synthetase (GCS) and glutathione synthetase (GS) in the presence of ATP. In this work, the effects of three different oxidative stresses were examined on GSH content and GSH-related enzyme activities in the fission yeast Schizosaccharomyces pombe. GSH content in S. pombe was significantly enhanced by treatment with hydrogen peroxide, ${\beta}$-naphthoflavone (BNF) and tert-butylhydroquinone (BHQ). Simultaneously, they greatly induced GCS and GS activity. However, they did not have any effects on glutathione reductase activity. These results suggest that GCS and GS activities in S. pombe are up-regulated by oxidative stress.

Keywords

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