TNFRSF10D (also known as DcR2 or TRAILR4) inhibits pro-apoptotic signaling by TRAIL (TNFSF10) receptors TNFRSF10A (TRAILR1, DR4) and TNFRSF10B (TRAILR2, DR5). TNFRSF10D has a truncated death domain (DD) but has the motifs involved in oligomerization of TRAIL receptors. While it was initially thought that TNFRSF10D functions as a decoy receptor that competes with TNFRSF10A and TNFRSF10B for ligand binding (Pan et al. 1997), latest studies indicate that it prevents TRAIL signaling by forming heterodimers with TNFRSF10A and TNFRSF10B and thus preventing formation of functional homotrimeric TRAIL ligand:receptor complexes (Neumann et al. 2014).