Enables serine O-acyltransferase activity. Involved in peptidyl-serine octanoylation. Located in endoplasmic reticulum. Is integral component of endoplasmic reticulum membrane. Is expressed in prostate gland and testis. Orthologous to human MBOAT4 (membrane bound O-acyltransferase domain containing 4). [provided by Alliance of Genome Resources, Apr 2022]