Biochem/physiol Actions
Methylmalonyl coenzyme A (CoA) is a catabolite of odd-chain fatty acids, cholesterol and few amino acids like valine, isoleucine, methionine, threonine. It is produced by the activity of the enzyme propionyl-CoA carboxylase(PCC). Methylmalonyl coenzyme A (CoA) is converted to succinyl-CoA by the methylmalonyl-CoA mutase (MCM) and vitamin B12 as the cofactor. Either a low MCM activity or an altered metabolism of vitamin B12 causes the inherited metabolic disease methylmalonic acidemia (MMA).