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- W4383312718 abstract "The endoplasmic reticulum (ER) maintains an oxidative redox environment that is advantageous for the oxidative folding of nascent polypeptides entering the ER. Reductive reactions within the ER are also crucial for maintaining ER homeostasis. However, the mechanism by which electrons are supplied for the reductase activity within the ER remains unknown. Here, we identify ER oxidoreductin-1α (Ero1α) as an electron donor for ERdj5, an ER-resident disulfide reductase. During oxidative folding, Ero1α catalyzes disulfide formation in nascent polypeptides through protein disulfide isomerase (PDI) and then transfers the electrons to molecular oxygen via flavin adenine dinucleotide (FAD), ultimately yielding hydrogen peroxide (H2O2). Besides this canonical electron pathway, we reveal that ERdj5 accepts electrons from specific cysteine pairs in Ero1α, demonstrating that the oxidative folding of nascent polypeptides provides electrons for reductive reactions in the ER. Moreover, this electron transfer pathway also contributes to maintaining ER homeostasis by reducing H2O2 production in the ER." @default.
- W4383312718 created "2023-07-07" @default.
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- W4383312718 date "2023-07-01" @default.
- W4383312718 modified "2023-10-14" @default.
- W4383312718 title "The oxidative folding of nascent polypeptides provides electrons for reductive reactions in the ER" @default.
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- W4383312718 doi "https://doi.org/10.1016/j.celrep.2023.112742" @default.
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