Receptor for TNFRSF25 and TNFRSF6B. Mediates activation of NF-kappa-B. Inhibits vascular endothelial growth and angiogenesis (in vitro). Promotes activation of caspases and apoptosis (By similarity). Promotes splenocyte alloactivation. Homotrimer. Up-regulated by TNF-alpha. Belongs to the tumor necrosis factor family.