Predicted to enable tumor necrosis factor receptor superfamily binding activity. Involved in myeloid dendritic cell differentiation; positive regulation of T cell activation; and positive regulation of cytokine production. Predicted to be located in extracellular space. Predicted to be integral component of membrane. Predicted to be active in plasma membrane. Orthologous to human TNFSF9 (TNF superfamily member 9). [provided by Alliance of Genome Resources, Apr 2022]