Predicted to enable cell adhesion molecule binding activity. Predicted to be involved in several processes, including establishment of endothelial intestinal barrier; positive regulation of blood-brain barrier permeability; and protein localization to cell-cell junction. Predicted to act upstream of or within regulation of G1/S transition of mitotic cell cycle. Located in cell-cell junction. Orthologous to human TJP3 (tight junction protein 3). [provided by Alliance of Genome Resources, Apr 2022]