IUBMB Enzyme Nomenclature


Accepted name: glutamate—[amino group carrier protein] ligase

Reaction: ATP + L-glutamate + an [amino-group carrier protein]-C-terminal-L-glutamate = ADP + phosphate + an [amino-group carrier protein]-C-terminal-γ-(L-glutamyl)-L-glutamate

Other name(s): argX (gene name)

Systematic name: L-glutamate:an [amino-group carrier protein]-C-terminal-L-glutamate ligase (ADP-forming)

Comments: The enzyme, originally characterized from the archaeon Sulfolobus acidocaldarius, is involved in L-arginine biosynthesis. The enzyme from the archaeon Thermococcus kodakarensis is bifunctional and also catalyses the activity of EC, [amino-group carrier protein]—L-2-aminoadipate ligase.

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


1. Ouchi, T., Tomita, T., Horie, A., Yoshida, A., Takahashi, K., Nishida, H., Lassak, K., Taka, H., Mineki, R., Fujimura, T., Kosono, S., Nishiyama, C., Masui, R., Kuramitsu, S., Albers, S.V., Kuzuyama, T. and Nishiyama, M. Lysine and arginine biosyntheses mediated by a common carrier protein in Sulfolobus. Nat. Chem. Biol. 9 (2013) 277-283. [PMID: 23434852]

2. Yoshida, A., Tomita, T., Atomi, H., Kuzuyama, T. and Nishiyama, M. Lysine biosynthesis of Thermococcus kodakarensis with the capacity to function as an ornithine biosynthetic system. J. Biol. Chem. 291 (2016) 21630-21643. [PMID: 27566549]

[EC created 2021]

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