Enables 3-oxoacid CoA-transferase activity and identical protein binding activity. Involved in several processes, including animal organ development; positive regulation of insulin secretion involved in cellular response to glucose stimulus; and response to ethanol. Located in mitochondrion. Biomarker of obesity and type 2 diabetes mellitus. Orthologous to human OXCT1 (3-oxoacid CoA-transferase 1). [provided by Alliance of Genome Resources, Apr 2022]