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- W3211059912 abstract "Metal restriction imposed by mammalian hosts during an infection is a common mechanism of defence to reduce or avoid the pathogen infection. Metals are essential for organism survival due to its involvement in several biological processes. Aspergillus fumigatus causes invasive aspergillosis, a disease that typically manifests in immunocompromised patients. A. fumigatus PpzA, the catalytic subunit of protein phosphatase Z (PPZ), has been recently identified as associated with iron assimilation. A. fumigatus has 2 high‐affinity mechanisms of iron acquisition during infection: reductive iron assimilation and siderophore‐mediated iron uptake. It has been shown that siderophore production is important for A. fumigatus virulence, differently to the reductive iron uptake system. Transcriptomic and proteomic comparisons between ∆ppzA and wild‐type strains under iron starvation showed that PpzA has a broad influence on genes involved in secondary metabolism. Liquid chromatography‐mass spectrometry under standard and iron starvation conditions confirmed that the ΔppzA mutant had reduced production of pyripyropene A, fumagillin, fumiquinazoline A, triacetyl‐fusarinine C, and helvolic acid. The ΔppzA was shown to be avirulent in a neutropenic murine model of invasive pulmonary aspergillosis. PpzA plays an important role at the interface between iron starvation, regulation of SM production, and pathogenicity in A. fumigatus." @default.
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- W3211059912 date "2017-01-01" @default.
- W3211059912 modified "2023-09-26" @default.
- W3211059912 title "Aspergillus fumigatus protein phosphatase PpzA is involved iniron assimilation, secondary metabolite production, andvirulence" @default.
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