E3 ubiquitin-protein ligase RNF216 (RNF216)

Isoform 1 acts as an E3 ubiquitin ligase, which accepts ubiquitin from specific E2 ubiquitin-conjugating enzymes, and then transfers it to substrates promoting their degradation by the proteasome. Promotes degradation of TRAF3, TLR4 and TLR9.

Contributes to the regulation of antiviral responses. Down- regulates activation of NF-kappa-B, IRF3 activation and IFNB production.