Cited by 55Redox biology and oxidative stressMitochondrial Function and PathologySulfur Compounds in Biology

Glutathione Reductase and a Mitochondrial Thioredoxin Play Overlapping Roles in Maintaining Iron-Sulfur Enzymes in Fission Yeast

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Song, Ji-Yoon, Cha, Joonseok, Lee, Joon, Roe, Jung-Hye·2006·Eukaryotic Cell

Abstract

In the fission yeast Schizosaccharomyces pombe , the pgr1 + gene encoding glutathione (GSH) reductase (GR) is essentially required for cell survival. Depletion of GR caused proliferation arrest at the G 1 phase of the cell cycle under aerobic conditions. Multicopy suppressors that restore growth were screened, and one effective suppressor was found to be the trx2 + gene, encoding a mitochondrial thioredoxin. This suggests that GR is critically required for some mitochondrial function(s). We found that GR resides in both cytosolic and organellar fractions of the cell. Depletion of GR lowered the respiration rate and the activity of oxidation-labile Fe-S enzymes such as mitochondrial aconitase and cytosolic sulfite reductase. Trx2 did not reverse the high ratio of oxidized glutathione to GSH or the low respiration rate observed in GR-depleted cells. However, it brought the activity of oxidation-labile Fe-S enzymes to a normal level, suggesting that the maintenance of Fe-S enzymes is a critical factor in the survival of S. pombe . The activity of succinate dehydrogenase, an oxidation-insensitive Fe-S enzyme, however, was not affected by GR depletion, suggesting that GR is not required for the biogenesis of the Fe-S cluster. The total iron content was greatly increased by GR depletion and was brought to a nearly normal level by Trx2. These results indicate that the essentiality of GR in the aerobic growth of S. pombe is derived from its role in maintaining oxidation-labile Fe-S enzymes and iron homeostasis.

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Crossref · 10.1128/ec.00244-06

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  • Mitochondrially localized GR is instrumental in maintaining cellular growth and the activities of some Fe-S proteins, at least in fission yeast Schizosaccharomyces pombe.

    “Mitochondrially localized GR has also been shown to be instrumental in maintaining cellular growth and the activities of some Fe-S proteins, at least in fission yeast Schizosaccharomyces pombe (395)”

    From Redox regulation of mitochondrial function (2012) · cites this paper as [395]

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Authors
Song, J.-Y., Cha, J., Lee, J., & Roe, J.-H.
Affiliations
Seoul National University (KR)
Venue
Eukaryotic Cell
Published
2006-11
Volume
5
Issue
11
Pages
1857-1865
ISSN
  • 1535-9778 (ISSN-L)
  • 1535-9786
OpenAlex
W2157029340
Cited by
55
References
57
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 3 · 2019: 3 · 2018: 6 · 2017: 8 · 2016: 3 · 2015: 2 · 2014: 1 · 2013: 2
FWCI
1.50
Type
journal article
Language
en
Open access
Locations
  • Eukaryotic Cell (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Sulfur Compounds in Biology
Keywords
glutathione reductase, mitochondrial thioredoxin, iron-sulfur enzymes, iron homeostasis, Schizosaccharomyces pombe, multicopy suppressor screen, G1 cell cycle arrest, respiration, aconitase, sulfite reductase, succinate dehydrogenase, iron-sulfur cluster assembly, glutathione redox state
MeSH terms
Amino Acid Sequence, Animals, Base Sequence, Glutathione, Glutathione Reductase, Homeostasis, Humans, Iron, Iron-Sulfur Proteins, Membrane Proteins, Mitochondria, Molecular Sequence Data, Oxidation-Reduction, Schizosaccharomyces, Thioredoxins, Sequence Alignment, Codon, Initiator, Cell Respiration, Schizosaccharomyces pombe Proteins, Rats

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