Predicted to enable protein tyrosine phosphatase activity. Acts upstream of or within several processes, including cellular response to leukemia inhibitory factor; positive regulation of vascular permeability; and regulation of vascular endothelial growth factor signaling pathway. Predicted to be located in endosome and plasma membrane. Predicted to be active in cytoplasm and nucleus. Is expressed in several structures, including central nervous system; liver; metanephros; and retina layer. Orthologous to human PTP4A3 (protein tyrosine phosphatase 4A3). [provided by Alliance of Genome Resources, Apr 2022]