Enables sphingosine N-acyltransferase activity. Involved in ceramide biosynthetic process and regulation of lipid metabolic process. Acts upstream of or within sphingolipid biosynthetic process. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be active in endoplasmic reticulum. Is expressed in epidermis stratum basale; epidermis stratum spinosum; limb; liver; and neural tube. Orthologous to human CERS2 (ceramide synthase 2). [provided by Alliance of Genome Resources, Apr 2022]