Reaction: 2'-(5-triphosphoribosyl)-3'-dephospho-CoA + malonate decarboxylase apo-[acyl-carrier protein] = malonate decarboxylase holo-[acyl-carrier protein] + diphosphate
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Other name(s): holo ACP synthase (ambiguous); 2'-(5"-triphosphoribosyl)-3'-dephospho-CoA:apo ACP 2'-(5"-triphosphoribosyl)-3'-dephospho-CoA transferase; MdcG; 2'-(5"-triphosphoribosyl)-3'-dephospho-CoA:apo-malonate-decarboxylase adenylyltransferase; holo-malonate-decarboxylase synthase (incorrect)
Systematic name: 2'-(5-triphosphoribosyl)-3'-dephospho-CoA:apo-malonate-decarboxylase 2'-(5-phosphoribosyl)-3'-dephospho-CoA-transferase
Comments: The δ subunit of malonate decarboxylase serves as an an acyl-carrier protein (ACP) and contains the cofactor 2'-(5-triphosphoribosyl)-3'-dephospho-CoA. Two reactions are involved in the production of the holo-ACP form of this enzyme. The first reaction is catalysed by EC 2.4.2.52, triphosphoribosyl-dephospho-CoA synthase. The resulting prosthetic group is then attached to the ACP subunit via a phosphodiester linkage to a serine residue, thus forming the holo form of the enzyme, in a manner analogous to that of EC 2.7.7.61, citrate lyase holo-[acyl-carrier protein] synthase.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 312492-44-7
References:
1. Hoenke, S., Wild, M.R. and Dimroth, P. Biosynthesis of triphosphoribosyl-dephospho-coenzyme A, the precursor of the prosthetic group of malonate decarboxylase. Biochemistry 39 (2000) 13223-13232. [PMID: 11052675]
2. Hoenke, S., Schmid, M. and Dimroth, P. Identification of the active site of phosphoribosyl-dephospho-coenzyme A transferase and relationship of the enzyme to an ancient class of nucleotidyltransferases. Biochemistry 39 (2000) 13233-13240. [PMID: 11052676]