Negatively regulates antiviral innate immune responses (PubMed:37656786). Disrupts the interaction of antiviral protein MAVS with innate immune receptor RIGI and inhibits MAVS aggregation, resulting in the repression of type I interferon signaling and innate immune responses (PubMed:37656786). . This is the function of ENSG00000214194 (SMIM30, small integral membrane protein 30).