Cited by 49Fungal and yeast genetics researchCancer, Hypoxia, and MetabolismRedox biology and oxidative stress

Time-Course Analysis of Gene Expression During the Saccharomyces cerevisiae Hypoxic Response

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Bendjilali, Nasrine, MacLeon, Samuel, Kalra, Gurmannat, Willis, Stephen D, Hossian, A K M Nawshad, Avery, Erica, Wojtowicz, Olivia, Hickman, Mark J·2017·G3 Genes Genomes Genetics

Abstract

Many cells experience hypoxia, or low oxygen, and respond by dramatically altering gene expression. In the yeast Saccharomyces cerevisiae, genes that respond are required for many oxygen-dependent cellular processes, such as respiration, biosynthesis, and redox regulation. To more fully characterize the global response to hypoxia, we exposed yeast to hypoxic conditions, extracted RNA at different times, and performed RNA sequencing (RNA-seq) analysis. Time-course statistical analysis revealed hundreds of genes that changed expression by up to 550-fold. The genes responded with varying kinetics suggesting that multiple regulatory pathways are involved. We identified most known oxygen-regulated genes and also uncovered new regulated genes. Reverse transcription-quantitative PCR (RT-qPCR) analysis confirmed that the lysine methyltransferase EFM6 and the recombinase DMC1, both conserved in humans, are indeed oxygen-responsive. Looking more broadly, oxygen-regulated genes participate in expected processes like respiration and lipid metabolism, but also in unexpected processes like amino acid and vitamin metabolism. Using principle component analysis, we discovered that the hypoxic response largely occurs during the first 2 hr and then a new steady-state expression state is achieved. Moreover, we show that the oxygen-dependent genes are not part of the previously described environmental stress response (ESR) consisting of genes that respond to diverse types of stress. While hypoxia appears to cause a transient stress, the hypoxic response is mostly characterized by a transition to a new state of gene expression. In summary, our results reveal that hypoxia causes widespread and complex changes in gene expression to prepare the cell to function with little or no oxygen.

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  • Several genome-wide expression studies under low oxygen conditions have reflected that the pattern of expression differs among ERG genes, although some general trends can be extracted.

    “Several genome-wide expression studies based on microarray and RNA-Seq analyses under low oxygen conditions have reflected that the pattern of expression differs among ERG genes, although some general trends can be extracted [94,96,98,100,101,102,103].”
  • Conflicting results have been observed for the effect of Hap1 on the expression of ERG genes during anaerobic conditions.

    “However, conflicting results have been observed for the effect of Hap1 on the expression of ERG genes during anaerobic conditions [75,96,99,100].”

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Authors
Bendjilali, N., MacLeon, S., Kalra, G., Willis, S. D., Hossian, A. K. M. N., Avery, E., Wojtowicz, O., & Hickman, M. J.
Affiliations
Rowan University (US)
Corresponding author
Hickman, Mark J
Venue
G3 Genes Genomes Genetics
Published
2017-01-01
Volume
7
Issue
1
Pages
221-231
ISSN
2160-1836 (ISSN-L)
OpenAlex
W2559018305
Cited by
49
References
54
Citations by year
2026: 5 · 2025: 4 · 2024: 3 · 2023: 4 · 2022: 3 · 2021: 9 · 2020: 9 · 2019: 3 · 2018: 5 · 2017: 4
FWCI
2.34
Type
journal article
Language
en
Open access
Locations
  • G3 Genes Genomes Genetics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Rowan Digitals Works (Rowan University) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Princeton University
  • Rowan University
  • National Institute of General Medical Sciences (R15GM113187)
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 › Redox biology and oxidative stress
Keywords
hypoxia, Saccharomyces cerevisiae, gene expression, oxygen regulation, time-course transcriptome, DMC1, lysine methyltransferase, recombinases, respiration, lipid metabolism, amino acid metabolism, vitamin metabolism, environmental stress response, principal component analysis, redox regulation
MeSH terms
DNA-Binding Proteins, Humans, Methyltransferases, Oxygen, RNA, Messenger, Saccharomyces cerevisiae, Transcription Factors, Cell Hypoxia, Gene Expression Regulation, Fungal, Sequence Analysis, RNA, Cell Cycle Proteins, Oligonucleotide Array Sequence Analysis, Saccharomyces cerevisiae Proteins, Gene-Environment Interaction

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