Enables phosphatidylethanolamine N-methyltransferase activity and phosphatidylethanolamine binding activity. Involved in several processes, including S-adenosylhomocysteine metabolic process; phosphatidylcholine biosynthetic process; and positive regulation of lipoprotein metabolic process. Located in brush border membrane and sarcolemma. Orthologous to human PEMT (phosphatidylethanolamine N-methyltransferase). [provided by Alliance of Genome Resources, Apr 2022]