Cited by 118Fungal and yeast genetics researchYeasts and Rust Fungi StudiesAntifungal resistance and susceptibility

Patterns of Genomic Variation in the Opportunistic Pathogen Candida glabrata Suggest the Existence of Mating and a Secondary Association with Humans

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Carreté, Laia, Ksiezopolska, Ewa, Pegueroles, Cinta, Gómez-Molero, Emilia, Saus, Ester, Iraola-Guzmán, Susana, Loska, Damian, Bader, Oliver +2 more·2018·Current Biology

Abstract

Candida glabrata is an opportunistic fungal pathogen that ranks as the second most common cause of systemic candidiasis. Despite its genus name, this yeast is more closely related to the model yeast Saccharomyces cerevisiae than to other Candida pathogens, and hence its ability to infect humans is thought to have emerged independently. Moreover, C. glabrata has all the necessary genes to undergo a sexual cycle but is considered an asexual organism due to the lack of direct evidence of sexual reproduction. To reconstruct the recent evolution of this pathogen and find footprints of sexual reproduction, we assessed genomic and phenotypic variation across 33 globally distributed C. glabrata isolates. We cataloged extensive copy-number variation, which particularly affects genes encoding cell-wall-associated proteins, including adhesins. The observed level of genetic variation in C. glabrata is significantly higher than that found in Candida albicans. This variation is structured into seven deeply divergent clades, which show recent geographical dispersion and large within-clade genomic and phenotypic differences. We show compelling evidence of recent admixture between differentiated lineages and of purifying selection on mating genes, which provides the first evidence for the existence of an active sexual cycle in this yeast. Altogether, our data point to a recent global spread of previously genetically isolated populations and suggest that humans are only a secondary niche for this yeast.

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Authors
Carreté, L., Ksiezopolska, E., Pegueroles, C., Gómez-Molero, E., Saus, E., Iraola-Guzmán, S., Loska, D., Bader, O., Fairhead, C., & Gabaldón, T.
Affiliations
  • Universitat Pompeu Fabra (ES)
  • Universitätsmedizin Göttingen (DE)
  • Institució Catalana de Recerca i Estudis Avançats (ES)
Corresponding author
Gabaldón, Toni
Venue
Current Biology
Publisher
Elsevier BV
Published
2018-01
Volume
28
Issue
1
Pages
15-27.e7
ISSN
0960-9822 (ISSN-L)
OpenAlex
W2586557085
Cited by
118
References
64
Citations by year
2026: 7 · 2025: 11 · 2024: 11 · 2023: 10 · 2022: 15 · 2021: 21 · 2020: 13 · 2019: 16 · 2018: 14
FWCI
4.81
Type
journal article
Language
en
Update notices
erratum (2022-07-25)
Open access
Locations
  • Current Biology (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • RECERCAT (Consorci de Serveis Universitaris de Catalunya) (publishedVersion, other-oa)
  • Repositori digital de la UPF (Universitat Pompeu Fabra) (publishedVersion, cc-by-nc-nd)
  • HAL (submittedVersion, cc-by-nc-nd)
  • Dipòsit Digital de Documents de la UAB (Universitat Autònoma de Barcelona) (submittedVersion, cc-by-nc-nd)
  • GoeScholar The Publication Server of the Georg-August-Universität Göttingen (Georg-August-Universität Göttingen) (submittedVersion, cc-by-nc-nd)
Funders
  • Spanish Ministry of Economy and Competitiveness (SEV-2012-0208, BFU2015-67107)
  • European Regional Development Fund
  • European Union (FP7-PEOPLE-2013-ITN-606786)
  • ERC Seventh Framework Programme (ERC-2012-StG-310325)
  • Catalan Research Agency (SGR857)
  • CERCA Programme/Generalitat de Catalunya
  • European Union’s Horizon 2020 (H2020-MSCA-ITN-2014-642095)
  • GDRI “iGenolevures”
  • CNRS
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Yeasts and Rust Fungi Studies
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
Keywords
Candida glabrata, sexual reproduction, copy number variation, clonal architecture, admixture, purifying selection, opportunistic fungal pathogens, Candida albicans comparison, geographic dispersal, systemic candidiasis
MeSH terms
Candidiasis, Humans, Phenotype, Reproduction, Genetic Variation, Genome, Fungal, Evolution, Molecular, Candida glabrata

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