Enables propanoyl-CoA C-acyltransferase activity. Involved in several processes, including carbohydrate derivative metabolic process; dauer larval development; and positive regulation of developmental process. Located in peroxisome. Expressed in body wall musculature; hypodermis; intestine; and neurons. Used to study obesity. Human ortholog(s) of this gene implicated in Zellweger syndrome. Is an ortholog of human SCP2 (sterol carrier protein 2).