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- W2890461213 abstract "The endoplasmic reticulum (ER) is an architecturally diverse organelle that serves as a membrane source for the replication of multiple viruses. Flaviviruses, including yellow fever virus, West Nile virus, dengue virus and Zika virus, induce unique single-membrane ER invaginations that house the viral replication machinery1. Whether this virus-induced ER remodelling is vulnerable to antiviral pathways is unknown. Here, we show that flavivirus replication at the ER is targeted by the interferon (IFN) response. Through genome-scale CRISPR screening, we uncovered an antiviral mechanism mediated by a functional gene pairing between IFI6 (encoding IFN-α-inducible protein 6), an IFN-stimulated gene cloned over 30 years ago2, and HSPA5, which encodes the ER-resident heat shock protein 70 chaperone BiP. We reveal that IFI6 is an ER-localized integral membrane effector that is stabilized through interactions with BiP. Mechanistically, IFI6 prophylactically protects uninfected cells by preventing the formation of virus-induced ER membrane invaginations. Notably, IFI6 has little effect on other mammalian RNA viruses, including the related Flaviviridae family member hepatitis C virus, which replicates in double-membrane vesicles that protrude outwards from the ER. These findings support a model in which the IFN response is armed with a membrane-targeted effector that discriminately blocks the establishment of virus-specific ER microenvironments that are required for replication." @default.
- W2890461213 created "2018-09-27" @default.
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- W2890461213 date "2018-09-17" @default.
- W2890461213 modified "2023-10-16" @default.
- W2890461213 title "A CRISPR screen identifies IFI6 as an ER-resident interferon effector that blocks flavivirus replication" @default.
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- W2890461213 doi "https://doi.org/10.1038/s41564-018-0244-1" @default.
- W2890461213 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6202210" @default.
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