Predicted to enable cytokine activity and tumor necrosis factor receptor binding activity. Acts upstream of or within CD8-positive, alpha-beta T cell differentiation; defense response to Gram-positive bacterium; and positive regulation of transcription by RNA polymerase II. Predicted to be located in extracellular space and membrane. Predicted to be integral component of membrane. Orthologous to human TNFSF8 (TNF superfamily member 8). [provided by Alliance of Genome Resources, Apr 2022]