Enables sterol O-acyltransferase activity. Acts upstream of or within cholesterol metabolic process. Predicted to be located in endoplasmic reticulum and membrane. Predicted to be active in endoplasmic reticulum membrane. Is expressed in several structures, including alimentary system; ear; genitourinary system; heart; and viscerocranium. Human ortholog(s) of this gene implicated in Chagas disease. Orthologous to human SOAT1 (sterol O-acyltransferase 1). [provided by Alliance of Genome Resources, Apr 2022]