Abstract

RIG-I is a cytosolic receptor recognizing virus-specific RNA structures and initiates an antiviral signaling that induces the production of interferons and proinflammatory cytokines. Because inappropriate RIG-I signaling affects either viral clearance or immune toxicity, multiple regulations of RIG-I have been investigated since its discovery as the viral RNA detector. In this review, we describe the recent progress in research on the regulation of RIG-I activity or abundance. Specifically, we focus on the mechanism that modulates RIGI- dependent antiviral response through post-translational modifications of or protein-protein interactions with RIG-I.

• Keywords: RIG-I; antiviral signaling; RNA virus; post-translational modification; protein-protein interaction