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- W4281655944 abstract "ABSTRACT Heme can serve as iron source in many environments, including the iron-poor animal host environment. The fungal pathobiont Candida albicans expresses a family of extracellular CFEM hemophores that capture heme from host proteins and transfer it across the cell wall to the cell membrane, to be endocytosed and utilized as heme or iron source. Here we identified Frp1 and Frp2, two ferric reductase (FRE)-related proteins that lack an extracellular N-terminal substrate-binding domain, as being required for hemoglobin heme utilization and for sensitivity to toxic heme analogs. Frp1/2 redistribute from the ER to the plasma membrane in the presence of hemoglobin, consistent with a direct role in heme trafficking. Expression of Frp1 with the CFEM hemophore Pga7 can promote heme utilization in Saccharomyces cerevisiae as well, confirming the functional interaction between these proteins. Sequence and structure comparison reveals that the CFEM hemophores are related to the FRE substrate-binding domain that is missing in Frp1/2. We conclude that Frp1/2 and the CFEM hemophores form a functional complex that evolved from ferric reductases to enable extracellular heme uptake." @default.
- W4281655944 created "2022-06-13" @default.
- W4281655944 creator A5010129925 @default.
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- W4281655944 date "2022-05-25" @default.
- W4281655944 modified "2023-09-27" @default.
- W4281655944 title "Ferric reductase-related proteins mediate fungal heme acquisition" @default.
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- W4281655944 doi "https://doi.org/10.1101/2022.05.25.493415" @default.
- W4281655944 hasPublicationYear "2022" @default.
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