IUBMB Enzyme Nomenclature


Accepted name: [butirosin acyl-carrier protein]—L-glutamate ligase

Reaction: (1) ATP + L-glutamate + BtrI acyl-carrier protein = ADP + phosphate + L-glutamyl-[BtrI acyl-carrier protein]
(2) ATP + L-glutamate + 4-amino butanoyl-[BtrI acyl-carrier protein] = ADP + phosphate + 4-(L-γ-glutamylamino)butanoyl-[BtrI acyl-carrier protein]

Other name(s): [BtrI acyl-carrier protein]—L-glutamate ligase; BtrJ

Systematic name: [BtrI acyl-carrier protein]:L-glutamate ligase (ADP-forming)

Comments: Catalyses two steps in the biosynthesis of the side chain of the aminoglycoside antibiotics of the butirosin family. The enzyme adds one molecule of L-glutamate to a dedicated acyl-carrier protein, and following decarboxylation of the product by EC, L-glutamyl-[BtrI acyl-carrier protein] decarboxylase, adds a second L-glutamate molecule. Requires Mg2+ or Mn2+, and activity is enhanced in the presence of Mn2+.

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


1. Li, Y., Llewellyn, N.M., Giri, R., Huang, F. and Spencer, J.B. Biosynthesis of the unique amino acid side chain of butirosin: possible protective-group chemistry in an acyl carrier protein-mediated pathway. Chem. Biol. 12 (2005) 665-675. [PMID: 15975512]

[EC created 2012]

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