Candida glabrata YPK2 is a multidrug susceptibility locus

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ID: 320424
2026
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Abstract
Abstract The biological conservation between fungi and mammals due to a common ancestor has made development of selective antifungal drugs a difficult challenge. Further complicating this situation is the selection of antifungal drug-resistant organisms during drug treatment. The pathogenic yeast Nakaseomyces glabratus (called here Candida glabrata) presents an especially challenging organism due to its tendency to frequently lose susceptibility to the major antifungal drug class the azoles. Additionally, C. glabrata develops resistance to echinocandin drugs, a second, more recently described antifungal agent at 10 times the rate of other organisms. Previous work has established that the sterol responsive transcriptional regulator Upc2A is a key determinant of azole susceptibility in C. glabrata and plays a role in echinocandin resistance. We used a biochemical approach to identify proteins that co-purified with Upc2A and identified the Ypk2 AGC kinase as an interacting protein. Strains lacking YPK2 exhibited increased susceptibility to fluconazole and the echinocandin caspofungin. A ypk2Δ strain failed to normally induce transcription of several ERG genes but exhibited normal induction of the CDR1 ATP-binding cassette transporter gene. Isogenic ypk2Δ strains were also highly susceptible to the three major classes of antifungal drugs, indicating that this kinase behaves as a multidrug susceptibility factor. RNA-seq analyses indicated that the transcriptional response to exposure is different for each drug and each response is differentially altered upon loss of Ypk2. Our data indicate that Ypk2 plays an important role in coordinating gene expression that impacts susceptibility to all major antifungal drug classes.
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openalex_W7167909239 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Lucia Šimoničová, Thomas P. Conway, Thomas Krüger, Axel A Brakhage, W. Scott Moye‐Rowley
Journal current genetics
Year 2026
DOI
10.1093/genetics/iyag176
URL
https://doi.org/10.1093/genetics/iyag176
Keywords Keywords not found

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