Cited by 128Fungal and yeast genetics researchBacterial Genetics and BiotechnologyRedox biology and oxidative stress

Regulatory Mechanisms Controlling Expression of the DAN/TIR Mannoprotein Genes During Anaerobic Remodeling of the Cell Wall in Saccharomyces cerevisiae

Abramova, Natalia E, Cohen, Brian D, Sertil, Odeniel, Kapoor, Rachna, Davies, Kelvin J A, Lowry, Charles V·2001·Genetics

Abstract

The DAN/TIR genes of Saccharomyces cerevisiae encode homologous mannoproteins, some of which are essential for anaerobic growth. Expression of these genes is induced during anaerobiosis and in some cases during cold shock. We show that several heme-responsive mechanisms combine to regulate DAN/TIR gene expression. The first mechanism employs two repression factors, Mox1 and Mox2, and an activation factor, Mox4 (for mannoprotein regulation by oxygen). The genes encoding these proteins were identified by selecting for recessive mutants with altered regulation of a dan1::ura3 fusion. MOX4 is identical to UPC2, encoding a binucleate zinc cluster protein controlling expression of an anaerobic sterol transport system. Mox4/Upc2 is required for expression of all the DAN/TIR genes. It appears to act through a consensus sequence termed the AR1 site, as does Mox2. The noninducible mox4Delta allele was epistatic to the constitutive mox1 and mox2 mutations, suggesting that Mox1 and Mox2 modulate activation by Mox4 in a heme-dependent fashion. Mutations in a putative repression domain in Mox4 caused constitutive expression of the DAN/TIR genes, indicating a role for this domain in heme repression. MOX4 expression is induced both in anaerobic and cold-shocked cells, so heme may also regulate DAN/TIR expression through inhibition of expression of MOX4. Indeed, ectopic expression of MOX4 in aerobic cells resulted in partially constitutive expression of DAN1. Heme also regulates expression of some of the DAN/TIR genes through the Rox7 repressor, which also controls expression of the hypoxic gene ANB1. In addition Rox1, another heme-responsive repressor, and the global repressors Tup1 and Ssn6 are also required for full aerobic repression of these genes.

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Crossref · 10.1093/genetics/157.3.1169

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  • Mot3 represses the expression of hypoxic, DAN/TIR/PAU and ERG genes including ERG2, ERG6 and ERG9.

    “In addition, to limit Ecm22 function [75], the transcriptional factor Mot3 also represses the expression of hypoxic, DAN/TIR/PAU and ERG genes including ERG2, ERG6 and ERG9 (Figure 3A) [86,89,90,91,92,93].”

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Authors
Abramova, N. E., Cohen, B. D., Sertil, O., Kapoor, R., Davies, K. J. A., & Lowry, C. V.
Affiliations
  • Albany Medical College (US)
  • Wadsworth Center (US)
  • University of Southern California (US)
Corresponding author
Lowry, Charles V
Venue
Genetics
Published
2001-03-01
Volume
157
Issue
3
Pages
1169-1177
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2167347342
Cited by
128
References
39
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 4 · 2021: 1 · 2020: 3 · 2019: 2 · 2018: 3 · 2017: 9 · 2016: 2 · 2015: 3 · 2014: 4 · 2013: 8 · 2012: 5
FWCI
2.21
Type
journal article
Language
en
Open access
closed
Locations
  • Genetics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
anaerobic growth, heme regulation, roX1, Tup1, Ssn6, cold shock, cell wall remodeling, transcriptional repression, Saccharomyces cerevisiae
MeSH terms
Alleles, Hypoxia, Cell Division, Cell Wall, DNA-Binding Proteins, Epistasis, Genetic, Fungal Proteins, Heme, Membrane Glycoproteins, Models, Genetic, Mutation, Nuclear Proteins, Plasmids, Promoter Regions, Genetic, Recombinant Fusion Proteins, Repressor Proteins, Saccharomyces cerevisiae, Transcriptional Activation, Gene Library, Gene Expression Regulation, Fungal, Zinc Fingers, Consensus Sequence, Protein Structure, Tertiary, Saccharomyces cerevisiae Proteins

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