Nitrogen Depletion Causes Up-Regulation of Glutathione Content and γ-Glutamyltranspeptidase in Schizosaccharomyces pombe

Seung-Hyun Song; Chang-Jin Lim

doi:10.1007/s12275-007-0244-y

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Nitrogen Depletion Causes Up-Regulation of Glutathione Content and γ-Glutamyltranspeptidase in Schizosaccharomyces pombe: Seung-Hyun Song , Chang-Jin Lim; Journal of Microbiology 2008;46(1):70-74.
DOI: https://doi.org/10.1007/s12275-007-0244-y

Author Affiliations

Division of Life Sciences and Research Institute of Life Sciences, Kangwon National University, Chuncheon 200-701, Republic of KoreaDivision of Life Sciences and Research Institute of Life Sciences, Kangwon National University, Chuncheon 200-701, Republic of Korea

Corresponding author: Chang-Jin Lim , Tel: 82-33-250-8514,

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Abstract

This work aims to elucidate the relationship between nitrogen depletion and Glutathione (GSH) level in Schizosaccharomyces pombe. The total GSH level was much higher in the Pap1-positive KP1 cells than in the Pap1-negative TP108-3C cells, suggesting that synthesis of GSH is dependent on Pap1. When the Pap1-positive KP1 cells were transferred to the nitrogen-depleted medium, total GSH level significantly increased up to 6 h and then slightly declined after 9 h. Elevation of the total GSH level was observed to be much less with the Pap1-negative cells. However, glucose deprivation was not able to enhance the GSH level in the KP1 cells. Activity of γ-glutamyltranspeptidase (γ-GT), an enzyme in the first step of GSH catabolism, also increased during nitrogen depletion. The total GSH level was more significantly enhanced in the KP1 cells overexpressing γ-GT2 than γ-GT1 during nitrogen starvation. Reactive oxygen species (ROS) levels were not changed during nitrogen starvation in both Pap1-positive and Pap1-negative cells. Collectively, nitrogen depletion causes up-regulation of GSH synthesis and γ-GT in a Pap1-dependent manner.

Keywords: fission yeast;glutathione;γ-glutamyltranspeptidase;Pap1;Schizosaccharomyces pombe

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Nitrogen Depletion Causes Up-Regulation of Glutathione Content and γ-Glutamyltranspeptidase in Schizosaccharomyces pombe

J. Microbiol. 2008;46(1):70-74.

DOI: https://doi.org/10.1007/s12275-007-0244-y

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