IUBMB Enzyme Nomenclature


Accepted name: 3,4-dihydroxybenzoate—[aryl-carrier protein] ligase

Reaction: ATP + 3,4-dihydroxybenzoate + holo-[aryl-carrier protein] = AMP + diphosphate + 3,4-dihydroxybenzoyl-[aryl-carrier protein] (overall reaction)
(1a) ATP + 3,4-dihydroxybenzoate = diphosphate + (3,4-dihydroxybenzoyl)adenylate
(1b) (3,4-dihydroxybenzoyl)adenylate + holo-[aryl-carrier protein] = AMP + 3,4-dihydroxybenzoyl-[aryl-carrier protein]

Other name(s): asbC (gene name)

Systematic name: 3,4-dihydroxybenzoate:[aryl-carrier protein] ligase (AMP-forming)

Comments: The adenylation domain of the enzyme catalyses the activation of 3,4-dihydroxybenzoate to (3,4-dihydroxybenzoyl)adenylate, followed by the transfer of the activated compound to the free thiol of a phosphopantetheine arm of an aryl-carrier protein domain. The aryl-carrier protein domain may be part of the same protein, or of a different protein. This activity is often found as part of a larger non-ribosomal peptide synthase.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Pfleger, B.F., Lee, J.Y., Somu, R.V., Aldrich, C.C., Hanna, P.C. and Sherman, D.H. Characterization and analysis of early enzymes for petrobactin biosynthesis in Bacillus anthracis. Biochemistry 46 (2007) 4147-4157. [PMID: 17346033]

[EC created 2020]

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