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Authored: Garapati, P V, 2010-08-02, Edited: Garapati, P V, 2010-08-02, RIG-I has two copies of caspase recruitment domain (CARD) in its N-terminus, DExD/H helicase domain with an ATP binding motif in the middle and a repressor domain (RD) in the C-terminus. In the absence of appropriate stimulation, RIG-I is in a 'closed' conformation in which the repressor domain phyically interacts with the helicase domain masking CARD. Upon viral infection the free triphosphate structure at the 5' end of the viral RNAs activate RIG-I by binding to its RNA helicase domain. This provokes change in RIG-I conformation exposing the CARD leading to RIG-I dimerization and allowing it to interact with the mitochondria-bound interferon beta promoter stimulator-1 (IPS-1)., Reviewed: Kawai, T, Akira, S, 2010-10-30
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dsRNA binds to RIG-I
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