The enzyme, which exists in all vertebrates, decarboxylates ethylmalonyl-CoA, a potentially toxic compound that is formed in low amounts by the activity of EC 184.108.40.206 (acetyl-CoA carboxylase) and EC 220.127.116.11 (propanoyl-CoA carboxylase). It prefers the S isomer, and can decarboxylate (R)-methylmalonyl-CoA with lower efficiency. cf. EC 18.104.22.168 (methylmalonyl-CoA decarboxylase).
Linster, C.L., Noel, G., Stroobant, V., Vertommen, D., Vincent, M.F., Bommer, G.T., Veiga-da-Cunha, M. and Van Schaftingen, E. Ethylmalonyl-CoA decarboxylase, a new enzyme involved in metabolite proofreading. J. Biol. Chem.286 (2011) 42992–43003. [PMID: 22016388]