Inhibits TNF-induced apoptosis by mediating the TNFAIP3 anti-apoptotic activity. Degraded by caspase-3-like family proteins upon TNF-induced apoptosis. May also play a role in the pro-inflammatory cytokine IL-1 signaling cascade (By similarity). Homooligomer. Interacts with TRAF6 in a IL-1-dependent manner. Interacts with TNFAIP3. Interacts with STARD13 (By similarity). The C-terminal UBZ-type zinc fingers function as ubiquitin-binding domains. Phosphorylated in the C-terminal region by CHUK/IKKA leading to NF-kappa-B signaling down-regulation.