Cited by 95Fungal and yeast genetics researchCancer, Hypoxia, and MetabolismGenomics and Chromatin Dynamics

MGA2 Is Involved in the Low-Oxygen Response Element-Dependent Hypoxic Induction of Genes in Saccharomyces cerevisiae

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Jiang, Yide, Vasconcelles, Michael J., Wretzel, Sharon, Light, Anne, Martin, Charles E., Goldberg, Mark A.·2001·Molecular and Cellular Biology

Abstract

Eukaryotes have the ability to respond to changes in oxygen tension by alterations in gene expression. For example, OLE1 expression in Saccharomyces cerevisiae is upregulated under hypoxic conditions. Previous studies have suggested that the pathway regulating OLE1 expression by unsaturated fatty acids may involve Mga2p and Spt23p, two structurally and functionally related proteins. To define the possible roles of each of these genes on hypoxia-induced OLE1 expression, we examined OLE1 expression under normoxia, hypoxia, and cobalt treatment conditions in Deltamga2 or Deltaspt23 deletion strains. The results of OLE1 promoter-lacZ reporter gene and Northern blot analyses showed that hypoxia- and cobalt-induced OLE1 expression was dramatically decreased in a Deltamga2 strain but not in a Deltaspt23 strain. Further analyses using low-oxygen response element (LORE)-CYC1-lacZ fusion reporter assays and electrophoretic mobility shift assays (EMSAs) demonstrated that MGA2 significantly affects the LORE-dependent hypoxic induction pathway of gene expression. When MGA2 was supplied by a plasmid, the LORE-dependent hypoxia-inducible reporter expression was recovered, as was the hypoxia-inducible complex in EMSAs in the S. cerevisiae Deltamga2 strain. Supershift analysis of EMSAs using crude extracts containing mycMga2p indicated that Mga2p is a component of the LORE-binding complex. Another LORE-dependent, hypoxia-inducible gene, ATF1, was similarly affected in the Deltamga2 strain. These results indicate that MGA2 is required for the LORE-dependent hypoxic gene induction in S. cerevisiae.

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Crossref · 10.1128/mcb.21.18.6161-6169.2001

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  • Oxygen depletion also enhances the expression of the oxygen-dependent fatty acid desaturase Ole1 through the Mga2 transcriptional factor.

    “Oxygen depletion also enhances the expression of the oxygen-dependent fatty acid desaturase Ole1 through the Mga2 transcriptional factor [97].”

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Authors
Jiang, Y., Vasconcelles, M. J., Wretzel, S., Light, A., Martin, C. E., & Goldberg, M. A.
Affiliations
  • Brigham and Women's Hospital (US)
  • Rutgers, The State University of New Jersey (US)
Corresponding author
Goldberg, Mark A.
Venue
Molecular and Cellular Biology
Published
2001-09-01
Volume
21
Issue
18
Pages
6161-6169
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2132946993
Cited by
95
References
37
Citations by year
2025: 2 · 2024: 2 · 2023: 1 · 2022: 3 · 2021: 1 · 2020: 6 · 2019: 6 · 2018: 3 · 2017: 5 · 2016: 5 · 2015: 3 · 2014: 1 · 2013: 3 · 2012: 9
FWCI
1.98
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01dk045098-08, DK45098)
  • National Institute of General Medical Sciences (GM45768, R01GM045768)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-45098)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
hypoxia response, OLE1, ATF1, gene expression regulation, unsaturated fatty acids, transcriptional regulation, Saccharomyces cerevisiae
MeSH terms
Fungal Proteins, Membrane Proteins, Oxygen, Saccharomyces cerevisiae, Stearoyl-CoA Desaturase, Transcription Factors, Transcriptional Activation, Trans-Activators, Cell Hypoxia, Gene Expression Regulation, Fungal, Saccharomyces cerevisiae Proteins, Fatty Acid Desaturases

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