Predicted to enable CDP-diacylglycerol-serine O-phosphatidyltransferase activity and L-serine-phosphatidylethanolamine phosphatidyltransferase activity. Predicted to act upstream of or within phosphatidylserine biosynthetic process. Predicted to be located in endoplasmic reticulum membrane. Orthologous to human PTDSS2 (phosphatidylserine synthase 2). [provided by Alliance of Genome Resources, Apr 2022]