Enables protein-tyrosine sulfotransferase activity. Acts upstream of or within fusion of sperm to egg plasma membrane involved in single fertilization; peptidyl-tyrosine sulfation; and prevention of polyspermy. Predicted to be located in endoplasmic reticulum. Predicted to be active in Golgi apparatus. Orthologous to human TPST2 (tyrosylprotein sulfotransferase 2). [provided by Alliance of Genome Resources, Apr 2022]