ID 2.1.3.1 DE methylmalonyl-CoA carboxytransferase. AN methylmalonyl-CoA carboxyltransferase. AN transcarboxylase. CA (S)-methylmalonyl-CoA + pyruvate = oxaloacetate + propanoyl-CoA. CC -!- A biotinyl-protein, containing cobalt and zinc. CC -!- The enzyme, described from the bacterium Propionibacterium shermanii, CC is unique among the biotin-dependent enzymes in that it catalyzes CC carboxyl transfer between two organic molecules, utilizing two CC separate carboxyltransferase domains. CC -!- The enzyme is a very large complex, consisting of a hexameric central CC core of 12S subunits surrounded by six 5S subunit dimers, each CC connected to the central core by twelve 1.3S biotin carrier subunits. DR Q8GBW6, 12S_PROFR ; Q70AC7, 5S_PROFR ; P02904, BCCP_PROFR ; //