Cited by 47Fungal and yeast genetics researchAntifungal resistance and susceptibilityFungal Infections and Studies

A novel role for a glycosylphosphatidylinositol‐anchored aspartyl protease, CgYps1, in the regulation of pH homeostasis in Candida glabrata

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Bairwa, Gaurav, Kaur, Rupinder·2011·Molecular Microbiology

Abstract

Proteases, key virulence factors of many bacterial and fungal pathogens, are pivotally important for nutrient acquisition, invasion and adherence to host cells and evasion/escape from host immune cells. In this study, we report a novel role for CgYps1, member of a family of 11 GPI-linked aspartyl proteases, in a human opportunistic fungal pathogen, Candida glabrata, in the regulation of pH homeostasis under acidic environmental conditions. We show that CgYps1 is required to survive low-external-pH environment and the inability of Cgyps1Δ mutant to maintain pH homeostasis results in intracellular acidification and increased reactive oxygen species (ROS) production. We also provide evidence that the reduced intracellular pH in Cgyps1Δ mutant under acidic conditions is, partly, owing to the diminished activity of a plasma membrane proton pump, CgPma1, an orthologue of a key component of pH homeostasis machinery in Saccharomyces cerevisiae, Pma1. In addition, we have examined C. glabrata's response to low environmental pH via genome-wide expression analysis and several genes required for protein folding/modification and stress response pathways including seven of the CgYPS genes were found to be upregulated. Lastly, we show that C. glabrata responds to acidic environment by reducing total β-glucan levels in the cell wall in a CgYps1-dependent manner.

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Crossref · 10.1111/j.1365-2958.2010.07496.x

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  • CgYPS genes are regulated by various environmental conditions including low pH, thermal stress, macrophage and neutrophil internalization.

    “CgYPS genes have been shown to be regulated by various environmental conditions including low pH, thermal stress, macrophage and neutrophil internalization [60,61,62,63].”

    From Candida glabrata: A Lot More Than Meets the Eye (2019) · cites this paper as [61]

  • The specific role of CgYPS1 in intracellular pH homeostasis has been attributed, in part, to regulation of the ATPase activity of the plasma membrane proton pump CgPma1.

    “This specific role of CgYPS1 in intracellular pH homeostasis has been attributed, in part, to regulation of the ATPase activity of the plasma membrane proton pump, CgPma1 [61].”

    From Candida glabrata: A Lot More Than Meets the Eye (2019) · cites this paper as [61]

  • CgYps1 is uniquely required to survive acid stress; CgYPS1 deletion led to low intracellular pH, high ROS levels and cell death under low pH and acidic environmental conditions.

    “Of eleven CgYapsins, CgYps1 is uniquely required to survive acid stress, as CgYPS1 deletion led to low intracellular pH, high ROS (reactive oxygen species) levels and cell death under low pH and acidic environmental conditions [61].”

    From Candida glabrata: A Lot More Than Meets the Eye (2019) · cites this paper as [61]

  • CgYapsins are pivotal to the regulation of several cellular processes such as maintenance of the cell wall architecture, pH and vacuole homeostasis, biofilm formation and interaction with the host.

    “Consistently, CgYapsins are pivotal to the regulation of several cellular processes such as maintenance of the cell wall architecture, pH and vacuole homeostasis, biofilm formation and interaction with the host [58,60,61,64].”

    From Candida glabrata: A Lot More Than Meets the Eye (2019) · cites this paper as [61]

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Authors
Bairwa, G., & Kaur, R.
Affiliations
Centre for DNA Fingerprinting and Diagnostics (IN)
Corresponding author
Kaur, Rupinder
Venue
Molecular Microbiology
Publisher
Wiley
Published
2010-12-23
Volume
79
Issue
4
Pages
900-913
ISSN
  • 0950-382X (ISSN-L)
  • 1365-2958
OpenAlex
W2163913940
Cited by
47
References
44
Citations by year
2026: 1 · 2025: 4 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 5 · 2020: 2 · 2019: 3 · 2018: 2 · 2017: 4 · 2016: 4 · 2015: 5 · 2014: 3 · 2013: 3 · 2012: 2
FWCI
0.91
Type
journal article
Language
en
Open access
Locations
  • Molecular Microbiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Council of Scientific and Industrial Research, India
  • Centre for DNA Fingerprinting and Diagnostics
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
Candida glabrata, pH homeostasis, intracellular acidification, reactive oxygen species, plasma membrane H+-ATPase, genome-wide gene expression, β-glucan, cell wall, opportunistic fungal pathogens
MeSH terms
Cell Wall, Cloning, Molecular, Fungal Proteins, Proton-Translocating ATPases, Homeostasis, Hydrogen-Ion Concentration, Mutation, Glycosylphosphatidylinositols, Reactive Oxygen Species, Gene Expression Profiling, Candida glabrata, beta-Glucans, Microbial Viability, Aspartic Acid Proteases

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