DEAD box proteins, characterized by the conserved motif Asp-Glu-Ala-Asp (DEAD), are putative RNA helicases which are implicated in a number of cellular processes involving RNA binding and alteration of RNA secondary structure. RIG-I contains RNA helicase-DEAD box protein motifs and a caspase recruitment domain (CARD). It is involved in viral double-stranded (ds) RNA recognition and the innate immune defense against viruses. Upon interaction with intracellular dsRNA produced during viral replication, RIG-I triggers a transduction cascade involving MAVS/IPS1, which results in the activation of NF-kappa-B, IRF3 and IRF7 and the induction of the expression of antiviral cytokines such as IFN-beta and RANTES (CCL5). This protein is essential for the production of interferons in response to RNA viruses including paramyxoviruses, influenza viruses, Japanese encephalitis virus and HCV.
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Protein Aliases: DDX58; DEAD (Asp-Glu-Ala-Asp) box polypeptide 58; DEAD box protein 58; DEAD-box protein 58; DEAD/H (Asp-Glu-Ala-Asp/His) box polypeptide; DEAD/H box polypeptide RIG-I; Probable ATP-dependent RNA helicase DDX58; Retinoic acid-inducible gene 1 protein; Retinoic acid-inducible gene I protein; retinoic acid-inducible gene-I; RIG-1; RIG-I; RIG-I-like receptor 1; RLR-1; RNA helicase RIG-I
Gene Aliases: 6430573D20Rik; C330021E21; DDX58; RIG-I; RIGI; RLR-1; SGMRT2