Phosphatidylserine receptor that plays an important functional role in regulatory B-cells homeostasis including generation, expansion and suppressor functions. As P- selectin/SELPLG ligand, plays a specialized role in activated but not naive T-cell trafficking during inflammatory responses. Controls thereby T-cell accumulation in the inflamed central nervous system (CNS) and the induction of autoimmune disease. Regulates also expression of various anti- inflammatory cytokines and co-inhibitory ligands including IL10. Acts as regulator of T-cell proliferation. May play a role in kidney injury and repair.