Cited by 59Fungal and yeast genetics researchAntifungal resistance and susceptibilityYeasts and Rust Fungi Studies

Evidence that Ergosterol Biosynthesis Modulates Activity of the Pdr1 Transcription Factor in Candida glabrata

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Vu, Bao Gia, Thomas, Grace Heredge, Moye-Rowley, W. Scott·2019·mBio

Abstract

A likely contributor to the increased incidence of non- albicans candidemias involving Candida glabrata is the ease with which this yeast acquires azole resistance, in large part due to induction of the ATP-binding cassette transporter-encoding gene CDR1 . Azole drugs lead to induction of Pdr1 transactivation, with a central model being that this factor binds these drugs directly. Here we provide evidence that Pdr1 is activated without azole drugs by the use of genetic means to inhibit expression of azole drug target-encoding gene ERG11 . These acute reductions in Erg11 levels lead to elevated Pdr1 activity even though no drug is present. A key transcriptional regulator of the ERG pathway, Upc2A, is shown to directly bind to the PDR1 and CDR1 promoters. We interpret these data as support for the view that Pdr1 function is responsive to ergosterol biosynthesis and suggest that this connection reveals the normal physiological circuitry in which Pdr1 participates.

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Authors
Vu, B. G., Thomas, G. H., & Moye-Rowley, W. S.
Affiliations
  • University of Iowa (US)
  • Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
Venue
mBio
Published
2019-06-25
Volume
10
Issue
3
ISSN
  • 2150-7511 (ISSN-L)
  • 2161-2129
OpenAlex
W2952191518
Cited by
59
References
43
Citations by year
2026: 6 · 2025: 5 · 2024: 8 · 2023: 12 · 2022: 11 · 2021: 5 · 2020: 10 · 2019: 1 · 2018: 1
FWCI
2.23
Type
journal article
Language
en
Open access
Locations
  • mBio (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
HHS | National Institutes of Health (GM49825)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Yeasts and Rust Fungi Studies
Keywords
ergosterol biosynthesis, ERG11, Candida glabrata, azole resistance, CDR1, ABC transporters, transcriptional regulation, drug target genes
MeSH terms
Cytochrome P-450 Enzyme System, DNA-Binding Proteins, Ergosterol, Fungal Proteins, Transcription Factors, Trans-Activators, Gene Expression Regulation, Fungal, Drug Resistance, Multiple, Fungal, Candida glabrata, Biosynthetic Pathways

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