E3 ubiquitin-protein ligase that acts as a negative regulator of NOD2 signaling by mediating ubiquitination and degradation of RIPK2. Also catalyzes ubiquitination and proteasomal degradation of CANX within the endoplasmic reticulum (By similarity). Could have a role in spermatogenesis (By similarity). S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + N(6)-ubiquitinyl-[acceptor protein]-L-lysine. Protein modification; protein ubiquitination. Interacts with CANX. The RING-type zinc finger is involved in CANX ubiquitination and degradation, but is not required for interaction with CANX.