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MAVS promotes interferon signaling in RNA virus infection by ZUFSP-mediated chromatin regulation.
International Immunopharmacology 2024 March 9
Mitochondria serve as a platform for innate immune signaling transduction, and mitochondrial antiviral signaling protein (MAVS) is essential for interferon-β (IFN-β) production and innate antiviral immunity against RNA viruses. Here, we identified zinc finger-containing ubiquitin peptidase 1 (ZUFSP/ZUP1) as a MAVS-interacting protein by using proximity-based labeling technology in HEK293T and found it could act as a positive regulator of the retinoic acid-inducible gene-I (RIG-I)-like receptors(RLRs), including RIG-I and interferon-induced helicase C domain-containing protein 1 (MDA5). ZUFSP deficiency markedly inhibited RNA virus-triggered induction of downstream antiviral genes, and Zufsp-deficient mice were more susceptible to RNA virus infection. After RNA virus infection,ZUFSP was translocated from cytoplasm to nucleus and interacted with chromatin remodeling complex to facilitate the opening of IFN-stimulated gene (ISG) loci for transcription. This study provides a critical mechanistic basis for MAVS-regulated chromatin remodeling to promote interferon signaling.
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