Enables malonyl-CoA decarboxylase activity. Involved in several processes, including acetyl-CoA biosynthetic process; fatty acid metabolic process; and response to ischemia. Located in cytosol; mitochondrial matrix; and peroxisomal matrix. Human ortholog(s) of this gene implicated in cardiomyopathy. Orthologous to human MLYCD (malonyl-CoA decarboxylase). [provided by Alliance of Genome Resources, Apr 2022]