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Glutathione content and the activities of glutathione-synthesizing enzymes in fission yeast are modulated by oxidative stress

Authors
Lee, YYKim, SJPark, EHLim, CJ
Issue Date
Sep-2003
Publisher
MICROBIOLOGY SOC KOREA
Keywords
tert-butylhydroquinone; gamma-glutamylcysteine synthetase; glutathione; glutathione synthetase; hydrogen peroxide; beta-naphthoflavone; Schizosaccharomyces pombe
Citation
JOURNAL OF MICROBIOLOGY, v.41, no.3, pp.248 - 251
Journal Title
JOURNAL OF MICROBIOLOGY
Volume
41
Number
3
Start Page
248
End Page
251
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/16167
ISSN
1225-8873
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.
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