Enables identical protein binding activity and tumor necrosis factor receptor superfamily binding activity. Involved in several processes, including intracellular signal transduction; positive regulation of secretion by cell; and tumor necrosis factor-mediated signaling pathway. Acts upstream of or within several processes, including animal organ development; cellular response to cytokine stimulus; and positive regulation of intracellular signal transduction. Predicted to be located in cytoplasm; extracellular space; and plasma membrane. Predicted to be integral component of membrane. Is expressed in genitourinary system; hemolymphoid system; hindlimb long bone; and lymphatic system. Used to study autosomal recessive osteopetrosis 2 and osteoporosis. Human ortholog(s) of this gene implicated in autosomal recessive osteopetrosis 2 and osteoporosis. Orthologous to human TNFSF11 (TNF superfamily member 11). [provided by Alliance of Genome Resources, Apr 2022]