Cited by 97Fungal and yeast genetics researchBacterial Genetics and BiotechnologyPolysaccharides and Plant Cell Walls

Regulation of cell wallβ-glucan assembly:PTC1 Negatively affectsPBS2 Action in a pathway that includes modulation ofEXG1 transcription

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Jiang, Bo, Ram, Arthur F. J., Sheraton, Jane, Klis, Frans M., Bussey, Howard·1995·Molecular and General Genetics MGG

Abstract

Analysis of genes involved in yeast cell wall beta-glucan assembly has led to the isolation of EXG1, PBS2 and PTC1. EXG1 and PBS2 were isolated as genes that, when expressed from multicopy plasmids, led to a dominant killer toxin-resistant phenotype. The PTC1 gene was cloned by functional complementation of the calcofluor white-hypersensitive mutant cwh47-1. PTC1/CWH47 is the structural gene for a type 2C serine/threonine phosphatase, EXG1 codes for an exo-beta-glucanase, and PBS2 encodes a MAP kinase kinase in the Pbs2p-Hog1p signal transduction pathway. Overexpression of EXG1 on a 2 mu plasmid led to reduction in a cell wall beta 1,6-glucan and caused killer resistance in wild type cells; while the exg1 delta mutant displayed modest increases in killer sensitivity and beta 1,6-glucan levels. Disruption of PTC1/CWH47 and overexpression of PBS2 gave rise to similar beta-glucan related phenotypes, with higher levels of EXG1 transcription, increased exo-beta-glucanase activity, reduced beta 1,6-glucan levels, and resistance to killer toxin. Genetic analysis revealed that loss of function of the PBS2 gene was epistatic to PTC1/CWH47 disruption, indicating a functional role for the Ptc1p/Cwh47p phosphatase in the Pbs2p-Hog1p signal transduction pathway. These results suggest that Ptc1p/Cwh47p and Pbs2p play opposing regulatory roles in cell wall glucan assembly, and that this is effected in part by modulating Exg1p activity.

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Crossref · 10.1007/bf02191592

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  • Glucans are major cell wall components in fungi and exoglucanases are involved in cell wall modification, cell adhesion, and killer toxin resistance.

    “Glucans are major cell wall components in fungi and exoglucanases are involved in cell wall modification, cell adhesion, and killer toxin resistance (Adams 2004; Jiang et al. 1995; Tsai et al. 2011; Xu et al. 2013).”

    From Biocontrol yeasts: mechanisms and applications (2019) · cites this paper as Jiang et al. 1995

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Authors
Jiang, B., Ram, A. F. J., Sheraton, J., Klis, F. M., & Bussey, H.
Affiliations
McGill University (CA)
Venue
Molecular and General Genetics MGG
Published
1995-08
Volume
248
Issue
3
Pages
260-269
ISSN
  • 0026-8925 (ISSN-L)
  • 1432-1874
OpenAlex
W2092264796
Cited by
97
References
56
Citations by year
2024: 5 · 2023: 7 · 2022: 4 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 1 · 2012: 3
FWCI
2.21
Type
journal article
Language
en
Open access
Locations
  • Molecular and General Genetics MGG (publishedVersion)
  • PubMed (publishedVersion)
  • UvA-DARE (University of Amsterdam) (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
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 › Agricultural and Biological Sciences › Plant Science › Polysaccharides and Plant Cell Walls
Keywords
Ptc1, Pbs2, MAP kinase kinase, β-1,6-glucan, transcriptional regulation, Saccharomyces cerevisiae, epistasis
MeSH terms
beta-Glucosidase, Cell Wall, Cloning, Molecular, Drug Resistance, Microbial, Enzyme Activation, Epistasis, Genetic, Genes, Dominant, Genes, Fungal, Glucans, Mutation, Phenotype, Phosphoric Monoester Hydrolases, Protein Kinases, Proteins, Saccharomyces cerevisiae, Transcription, Genetic, Gene Expression Regulation, Fungal, Mitogen-Activated Protein Kinase Kinases, Saccharomyces cerevisiae Proteins, Glucan 1,3-beta-Glucosidase, Killer Factors, Yeast

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