This gene encodes a member of the tumor necrosis factor superfamily of proteins. The encoded receptor has been shown to bind to the ligand TRAIL (tumor necrosis factor-related apoptosis-inducing ligand), but to have no signaling capacity. This gene shows elevated expression in mice with diet-induced fatty liver disease. This gene and other family members are present in a gene cluster on chromosome 7. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2015]