Predicted to enable myosin phosphatase regulator activity and protein phosphatase 1 binding activity. Acts upstream of or within establishment of endothelial barrier. Predicted to be located in cell projection; nuclear speck; and perinuclear region of cytoplasm. Predicted to be active in plasma membrane. Is expressed in several structures, including brain; eye; heart; hemolymphoid system; and spinal cord. Orthologous to human PPP1R16B (protein phosphatase 1 regulatory subunit 16B). [provided by Alliance of Genome Resources, Apr 2022]