IUBMB Enzyme Nomenclature


Accepted name: staphyloferrin B synthase

Reaction: ATP + 2-[(L-alanin-3-ylcarbamoyl)methyl]-3-(2-aminoethylcarbamoyl)-2-hydroxypropanoate + 2-oxoglutarate = AMP + diphosphate + staphyloferrin B

For diagram of reaction click here

Glossary: staphyloferrin B = 5-[(2-{[(3S)-5-{[(2S)-2-amino-2-carboxyethyl]amino}-3-carboxy-3-hydroxy-5-oxopentanoyl]amino}ethyl)amino]-2,5-dioxopentanoate

Other name(s): sbnC (gene name)

Systematic name: 2-[(L-alanin-3-ylcarbamoyl)methyl]-3-(2-aminoethylcarbamoyl)-2-hydroxypropanoate:2-oxoglutarate ligase (staphyloferrin B-forming)

Comments: Requires Mg2+. The enzyme, characterized from the bacterium Staphylococcus aureus, catalyses the last step in the biosynthesis of the siderophore staphyloferrin B. It belongs to a class of siderophore synthases known as type B nonribosomal peptide synthase-independent synthases (NIS). Type B NIS enzymes recognize the δ-acid group of 2-oxoglutarate. The enzyme forms a 2-oxoglutarate adenylate intermediate prior to ligation.

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


1. Cheung, J., Beasley, F.C., Liu, S., Lajoie, G.A. and Heinrichs, D.E. Molecular characterization of staphyloferrin B biosynthesis in Staphylococcus aureus. Mol. Microbiol. 74 (2009) 594-608. [PMID: 19775248]

[EC created 2019]

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