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- W4310482495 abstract "Abstract The human fungal pathogen, Candida albicans , is very proficient at several classical virulence factors such as morphogenesis, adhesion, biofilm formation and immune evasion through β-glucan masking. The protein kinase A (PKA) pathway is involved in both morphogenesis and β-glucan masking. Several signals converge onto the PKA pathway, but it contains only a single upstream G-protein coupled receptor, Gpr1. We identified specific residues within the N-terminal tail of Gpr1 that are required for methionine-induced morphogenesis through Tpk2. Furthermore, we observe that Gpr1-Gpa2 has an active role in exposing glucans. Even though Gpr1 is required for survival when C. albicans is challenged with macrophages, specifically disrupting morphogenesis did not attenuate this survival. Additionally, constitutive β-glucan masking did not improve C. albicans survival rates in the macrophage assay. Taken together, this indicates that Gpr1 may regulate additional mechanisms, possibly through glutamine 461, which are crucial in a macrophage context. Significance Statement Candida albicans is a human fungal pathogen mostly present as a commensal in the gastrointestinal tract. It can rapidly adapt to its everchanging environment through continuous monitoring of extracellular signals. These extracellular signals include methionine and lactate which induce respectively morphogenesis and β-glucan masking through the G-protein coupled receptor, Gpr1. Through a mutagenic approach we different amino acids of the receptor sense methionine and/or lactate but we show that Gpr1 may have an additional ligand that affect its survival in macrophages." @default.
- W4310482495 created "2022-12-10" @default.
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- W4310482495 date "2022-11-30" @default.
- W4310482495 modified "2023-09-26" @default.
- W4310482495 title "Differential sensing by the<i>C. albicans</i>Gpr1 receptor results in morphogenesis, β-glucan masking and survival in macrophages" @default.
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- W4310482495 doi "https://doi.org/10.1101/2022.11.30.518566" @default.
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