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- W2174558210 abstract "ABSTRACT Cryptococcus neoformans is a facultative intracellular fungal pathogen that has a polysaccharide capsule and causes life-threatening meningoencephalitis. Its capsule, as well as its ability to survive in the acidic environment of the phagolysosome, contributes to the pathogen's resilience in the host environment. Previously, we reported that downregulation of allergen 1 ( ALL1 ) results in the secretion of a shorter, more viscous exopolysaccharide with less branching and structural complexity, as well as altered iron homeostasis. Now, we report on a homologous coregulated gene, allergen 2 ( ALL2 ). ALL2 's function was characterized by generating null mutants in C. neoformans . In contrast to ALL1 , loss of ALL2 attenuated virulence in the pulmonary infection model. The all2 Δ mutant shed a less viscous exopolysaccharide and exhibited higher sensitivity to hydrogen peroxide than the wild type, and as a result, the all2 Δ mutant was more resistant to macrophage-mediated killing. Transcriptome analysis further supported the distinct function of these two genes. Unlike ALL1 's involvement in iron homeostasis, we now present data on ALL2 's unique function in maintaining intracellular pH in low-pH conditions. Thus, our data highlight that C. neoformans , a human-pathogenic basidiomycete, has evolved a unique set of virulence-associated genes that contributes to its resilience in the human niche." @default.
- W2174558210 created "2016-06-24" @default.
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- W2174558210 date "2016-02-01" @default.
- W2174558210 modified "2023-10-14" @default.
- W2174558210 title "<i>ALL2</i> , a Homologue of <i>ALL1</i> , Has a Distinct Role in Regulating pH Homeostasis in the Pathogen Cryptococcus neoformans" @default.
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- W2174558210 doi "https://doi.org/10.1128/iai.01046-15" @default.
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