Enables tumor necrosis factor receptor superfamily binding activity. Involved in T cell proliferation; positive regulation of activated T cell proliferation; and positive regulation of interleukin-2 production. Located in cell surface. Human ortholog(s) of this gene implicated in myocardial infarction. Orthologous to human TNFSF4 (TNF superfamily member 4). [provided by Alliance of Genome Resources, Apr 2022]