Predicted to enable signaling receptor activity. Acts upstream of or within several processes, including positive regulation of germinal center formation; positive regulation of interferon-gamma production; and positive regulation of lymphocyte activation. Located in external side of plasma membrane. Is expressed in genitourinary system; hemolymphoid system gland; lung; and retina. Human ortholog(s) of this gene implicated in common variable immunodeficiency. Orthologous to human TNFRSF13C (TNF receptor superfamily member 13C). [provided by Alliance of Genome Resources, Apr 2022]