RNA helicase involved in mRNA processing and antiviral innate immunity. Pre-mRNA processing factor involved in disassembly of spliceosomes after the release of mature mRNA. In cooperation with TFIP11 seem to be involved in the transition of the U2, U5 and U6 snRNP-containing IL complex to the snRNP-free IS complex leading to efficient debranching and turnover of excised introns. Plays a key role in antiviral innate immunity by promoting both MAVS-dependent signaling and NLRP6 inflammasome. Acts as an RNA virus sensor: recognizes and binds viral double stranded RNA (dsRNA) and activates the MAVS-dependent signaling to produce interferon-beta and interferon lambda-3 (IFNL3). Involved in intestinal antiviral innate immunity together with NLRP6: recognizes and binds viral dsRNA and promotes activation of the NLRP6 inflammasome in intestinal epithelial cells to restrict infection by enteric viruses. The NLRP6 inflammasome acts by promoting maturation and secretion of IL18 in the extracellular milieu (By similarity). Also involved in antibacterial innate immunity by promoting Wnt-induced antimicrobial protein expression in Paneth cells (By similarity).
Subcellular locations: Nucleus, Nucleus, Nucleolus