Enables serine O-acyltransferase activity. Involved in peptidyl-serine octanoylation. Predicted to be located in endoplasmic reticulum. Predicted to be active in membrane. Predicted to be integral component of endoplasmic reticulum membrane. Orthologous to human MBOAT4 (membrane bound O-acyltransferase domain containing 4). [provided by Alliance of Genome Resources, Apr 2022]