Predicted to enable tumor necrosis factor receptor activity. Acts upstream of or within notochord development and positive regulation of apoptotic process. Predicted to be located in membrane. Predicted to be part of CD95 death-inducing signaling complex. Predicted to be active in external side of plasma membrane and membrane raft. Is expressed in several structures, including blastoderm; digestive system; eye; notochord; and ovary. Human ortholog(s) of this gene implicated in several diseases, including autoimmune disease (multiple); cystic fibrosis; hematologic cancer (multiple); pre-eclampsia (multiple); and urinary system cancer (multiple). Orthologous to human FAS (Fas cell surface death receptor).