Reaction: [biotin carboxyl-carrier protein]-N6-carboxybiotinyl-L-lysine + acetyl-CoA = [biotin carboxyl-carrier protein]-N6-biotinyl-L-lysine + malonyl-CoA
Other name(s): accAD (gene names)
Systematic name: [biotin carboxyl-carrier protein]-N6-carboxybiotinyl-L-lysine:acetyl-CoA:carboxytransferase
Comments: The enzyme catalyses the transfer of a carboxyl group carried on a biotinylated biotin carboxyl carrier protein (BCCP) to acetyl-CoA, forming malonyl-CoA. In some organisms this activity is part of a multi-domain polypeptide that includes the carrier protein and EC 18.104.22.168, biotin carboxylase (see EC 22.214.171.124, acetyl-CoA carboxylase). Some enzymes can also carboxylate propanonyl-CoA and butanoyl-CoA (cf. EC 126.96.36.199, propionyl-CoA carboxylase).
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
1. Bilder, P., Lightle, S., Bainbridge, G., Ohren, J., Finzel, B., Sun, F., Holley, S., Al-Kassim, L., Spessard, C., Melnick, M., Newcomer, M. and Waldrop, G.L. The structure of the carboxyltransferase component of acetyl-coA carboxylase reveals a zinc-binding motif unique to the bacterial enzyme. Biochemistry 45 (2006) 1712-1722. [PMID: 16460018]
2. Chuakrut, S., Arai, H., Ishii, M. and Igarashi, Y. Characterization of a bifunctional archaeal acyl coenzyme A carboxylase. J. Bacteriol. 185 (2003) 938-947. [PMID: 12533469]