beta-methylcrotonyl-CoA + ATP + HCO3- <=> beta-methylglutaconyl-CoA + ADP + orthophosphate + H2O (MCCA) (Xenopus tropicalis)
beta-methylcrotonyl-coa + atp + hco3- <=> beta-methylglutaconyl-coa + adp + orthophosphate + h2o (mcca) (xenopus tropicalis)