ATP + hydrogencarbonate + propanoyl-CoA = (S)-methylmalonyl-CoA + ADP + H(+) + phosphate Metabolic intermediate metabolism; propanoyl-CoA degradation; succinyl-CoA from propanoyl-CoA: step 1/3. Probably a dodecamer composed of six biotin-containing alpha subunits and six beta subunits. Transcriptionally regulated by PccR. Expression is dependent on the carbon source supplied: transcript levels from acetate- and propionate-grown cells increase 6- and 10-fold, respectively, when compared with succinate-grown cells. Belongs to the AccD/PCCB family.