Enables virus receptor activity. Predicted to be involved in heterophilic cell-cell adhesion via plasma membrane cell adhesion molecules; homophilic cell adhesion via plasma membrane adhesion molecules; and positive regulation of leukocyte mediated cytotoxicity. Predicted to act upstream of or within cell migration and cell-cell adhesion. Predicted to be located in cell surface and plasma membrane. Predicted to be integral component of membrane. Predicted to be active in adherens junction. Orthologous to human PVR (PVR cell adhesion molecule). [provided by Alliance of Genome Resources, Apr 2022]