Reaction: (2S)-2-amino-4-deoxychorismate + L-glutamate = chorismate + L-glutamine
For diagram of reaction, click here
Glossary: (2S)-2-amino-4-deoxychorismate = (2S,3S)-3-(1-carboxyvinyloxy)-2,3-dihydroanthranilate
Other name(s): ADIC synthase; 2-amino-2-deoxyisochorismate synthase; SgcD
Systematic name: (2S)-2-amino-4-deoxychorismate:2-oxoglutarate aminotransferase
Comments: Requires Mg2+. The reaction occurs in the reverse direction to that shown above. In contrast to most anthranilate-synthase I (ASI) homologues, this enzyme is not inhibited by tryptophan. In Streptomyces globisporus, the sequential action of this enzyme and EC 220.127.116.11, 2-amino-4-deoxychorismate dehydrogenase, leads to the formation of the benzoxazolinate moiety of the enediyne antitumour antibiotic C-1027 [1,2]. In certain Pseudomonads the enzyme participates in the biosynthesis of phenazine, a precursor for several compounds with antibiotic activity [3,4].
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:
1. Van Lanen, S.G., Lin, S. and Shen, B. Biosynthesis of the enediyne antitumor antibiotic C-1027 involves a new branching point in chorismate metabolism. Proc. Natl. Acad. Sci. USA 105 (2008) 494-499. [PMID: 18182490]
2. Yu, L., Mah, S., Otani, T. and Dedon, P. The benzoxazolinate of C-1027 confers intercalative DNA binding. J. Am. Chem. Soc. 117 (1995) 8877-8878.
3. McDonald, M., Mavrodi, D.V., Thomashow, L.S. and Floss, H.G. Phenazine biosynthesis in Pseudomonas fluorescens: branchpoint from the primary shikimate biosynthetic pathway and role of phenazine-1,6-dicarboxylic acid. J. Am. Chem. Soc. 123 (2001) 9459-9460. [PMID: 11562236]
4. Laursen, J.B. and Nielsen, J. Phenazine natural products: biosynthesis, synthetic analogues, and biological activity. Chem. Rev. 104 (2004) 1663-1686. [PMID: 15008629]