Cited by 67Histone Deacetylase Inhibitors ResearchFungal and yeast genetics researchGenomics and Chromatin Dynamics

HdaA, a Major Class 2 Histone Deacetylase of Aspergillus nidulans , Affects Growth under Conditions of Oxidative Stress

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Tribus, Martin, Galehr, Johannes, Trojer, Patrick, Brosch, Gerald, Loidl, Peter, Marx, Florentine, Haas, Hubertus, Graessle, Stefan·2005·Eukaryotic Cell

Abstract

Histone deacetylases (HDACs) catalyze the removal of acetyl groups from the ε-amino group of distinct lysine residues in the amino-terminal tail of core histones. Since the acetylation status of core histones plays a crucial role in fundamental processes in eukaryotic organisms, such as replication and regulation of transcription, recent research has focused on the enzymes responsible for the acetylation/deacetylation of core histones. Very recently, we showed that HdaA, a member of the Saccharomyces cerevisiae HDA1-type histone deacetylases, is a substantial contributor to total HDAC activity in the filamentous fungus Aspergillus nidulans. Now we demonstrate that deletion of the hdaA gene indeed results in the loss of the main activity peak and in a dramatic reduction of total HDAC activity. In contrast to its orthologs in yeast and higher eukaryotes, HdaA has strong intrinsic activity as a protein monomer when expressed as a recombinant protein in a prokaryotic expression system. In vivo, HdaA is involved in the regulation of enzymes which are of vital importance for the cellular antioxidant response in A. nidulans . Consequently, Δ hdaA strains exhibit significantly reduced growth on substrates whose catabolism generates molecules responsible for oxidative stress conditions in the fungus. Our analysis revealed that reduced expression of the fungal catalase CatB is jointly responsible for the significant growth reduction of the hdaA mutant strains.

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Crossref · 10.1128/ec.4.10.1736-1745.2005

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Authors
Tribus, M., Galehr, J., Trojer, P., Brosch, G., Loidl, P., Marx, F., Haas, H., & Graessle, S.
Affiliations
Innsbruck Medical University (AT)
Corresponding author
Graessle, Stefan
Venue
Eukaryotic Cell
Published
2005-10
Volume
4
Issue
10
Pages
1736-1745
ISSN
  • 1535-9778 (ISSN-L)
  • 1535-9786
OpenAlex
W2140680341
Cited by
67
References
63
Citations by year
2026: 2 · 2025: 4 · 2024: 3 · 2023: 2 · 2022: 8 · 2021: 5 · 2020: 6 · 2019: 5 · 2018: 5 · 2017: 2 · 2016: 3 · 2015: 4 · 2014: 4 · 2013: 2 · 2012: 1
FWCI
0.50
Type
journal article
Language
en
Open access
Locations
  • Eukaryotic Cell (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Oesterreichische Nationalbank
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Histone Deacetylase Inhibitors Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
histone deacetylase, Aspergillus nidulans, oxidative stress, antioxidant response, fungal growth, recombinant protein expression
MeSH terms
Aspergillus nidulans, Catalase, Fungal Proteins, Histone Deacetylases, Hydrogen Peroxide, Mutation, Phenotype, Oxidants, Reactive Oxygen Species, Oxidative Stress, Hyphae

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