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- W4306246998 abstract "The yeast SKI (superkiller) complex was originally identified from cells that were infected by the M 'killer' virus. Ski2, as the core of the SKI complex, is a cytoplasmic cofactor and regulator of RNA-degrading exosome. The putative RNA helicase Ski2 was highly conserved from yeast to animals and has been demonstrated to play a key role in the regulation of RNA surveillance, temperature sensitivity, and growth in several yeasts but not yet in Cryptococcus neoformans (C. neoformans). Here, we report the identification of a gene encoding an equivalent Ski2 protein, named SKI2, in the fungal pathogen C. neoformans. To obtain insights into the function of Ski2, we created a mutant strain, ski2Δ, with the CRISPR-Cas9 editing tool. Disruption of SKI2 impaired cell wall integrity. Further investigations revealed the defects of the ski2Δ mutant in resistance to osmotic stresses and extreme growth temperatures. However, significantly, the ability to undergo invasive growth under nutrient-depleted conditions was increased in the ski2Δ mutant. More importantly, our results showed that the ski2Δ mutant exhibited slightly lower virulence and severe susceptibility to anti-ribosomal drugs by comparison to the wild type, but it developed multidrug resistance to azoles and flucytosine. By constructing the double deletion strain ski2Δafr1Δ, we verified that increased Afr1 in ski2Δ contributed to the azole resistance, which might be influenced by nonclassical small interfering RNA. Our work suggests that Ski2 plays critical roles in drug resistance and regulation of gene transcription in the yeast pathogen C. neoformans." @default.
- W4306246998 created "2022-10-15" @default.
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- W4306246998 date "2022-10-14" @default.
- W4306246998 modified "2023-10-16" @default.
- W4306246998 title "The RNA helicase Ski2 in the fungal pathogen <i>Cryptococcus neoformans</i> highlights key roles in azoles resistance and stress tolerance" @default.
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- W4306246998 doi "https://doi.org/10.1093/mmy/myac083" @default.
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