Cited by 401Fungal and yeast genetics researchAntifungal resistance and susceptibilityFungal Infections and Studies

The Saccharomyces cerevisiae FKS1 (ETG1) gene encodes an integral membrane protein which is a subunit of 1,3-beta-D-glucan synthase.

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Douglas, C M, Foor, F, Marrinan, J A, Morin, N, Nielsen, J B, Dahl, A M, Mazur, P, Baginsky, W +2 more·1994·Proceedings of the National Academy of Sciences

Abstract

In Saccharomyces cerevisiae, mutations in FKS1 confer hypersensitivity to the immunosuppressants FK506 and cyclosporin A, while mutations in ETG1 confer resistance to the cell-wall-active echinocandins (inhibitors of 1,3-beta-D-glucan synthase) and, in some cases, concomitant hypersensitivity to the chitin synthase inhibitor nikkomycin Z. The FKS1 and ETG1 genes were cloned by complementation of these phenotypes and were found to be identical. Disruption of the gene results in (i) a pronounced slow-growth phenotype, (ii) hypersensitivity to FK506 and cyclosporin A, (iii) a slight increase in sensitivity to echinocandin, and (iv) a significant reduction in 1,3-beta-D-glucan synthase activity in vitro. The nucleotide sequence encodes a 215-kDa polypeptide predicted to be an integral membrane protein with 16 transmembrane helices, consistent with previous observations that the etg1-1 mutation results in echinocandin-resistant glucan synthase activity associated with the nonextractable membrane fraction of the enzyme. These results suggest that FKS1 encodes a subunit of 1,3-beta-D-glucan synthase. The residual activity present in the disruption mutant, the nonessential nature of the gene, and results of Southern blot hybridization analysis point to the existence of a glucan synthase isozyme.

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Crossref · 10.1073/pnas.91.26.12907

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Authors
Douglas, C. M., Foor, F., Marrinan, J. A., Morin, N., Nielsen, J. B., Dahl, A. M., Mazur, P., Baginsky, W., Li, W., & el-Sherbeini, M.
Affiliations
Merck & Co., Inc., Rahway, NJ, USA (United States) (US)
Venue
Proceedings of the National Academy of Sciences
Published
1994-12-20
Volume
91
Issue
26
Pages
12907-12911
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2125672511
Cited by
401
References
28
Citations by year
2026: 9 · 2025: 8 · 2024: 11 · 2023: 9 · 2022: 7 · 2021: 11 · 2020: 15 · 2019: 13 · 2018: 9 · 2017: 7 · 2016: 7 · 2015: 8 · 2014: 13 · 2013: 8 · 2012: 14
FWCI
5.06
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Health Sciences › Medicine › Epidemiology › Fungal Infections and Studies
Keywords
FKS1, 1,3-β-D-glucan synthase, Saccharomyces cerevisiae, integral membrane proteins, echinocandin resistance, nikkomycin Z, chitin synthase inhibitors, yeast cell wall
MeSH terms
Base Sequence, Calmodulin-Binding Proteins, Cloning, Molecular, Fungal Proteins, Genes, Fungal, Glucosyltransferases, Membrane Proteins, Molecular Sequence Data, Phosphoprotein Phosphatases, Saccharomyces cerevisiae, Sequence Homology, Nucleic Acid, Restriction Mapping, Mutagenesis, Insertional, Tacrolimus, Calcineurin

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