IUBMB Enzyme Nomenclature


Accepted name: aminodeoxyfutalosine synthase

Reaction: S-adenosyl-L-methionine + 3-[(1-carboxyvinyl)oxy]benzoate + H2O = 6-amino-6-deoxyfutalosine + L-methionine + HCO3-

For diagram of reaction click here.

Glossary: 6-amino-6-deoxyfutalosine = 3-{3-[(2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl]propanoyl}benzoate

Other name(s): MqnE; AFL synthase; aminofutalosine synthase

Systematic name: S-adenosyl-L-methionine:3-[(1-carboxyvinyl)-oxy]benzoate adenosyltransferase (HCO3--hydrolysing, 6-amino-6-deoxyfutalosine-forming)

Comments: This enzyme is a member of the ’AdoMet radical’ (radical SAM) family. S-Adenosyl-L-methionine acts as both a radical generator and as the source of the transferred adenosyl group. The enzyme, found in several bacterial species, is part of the futalosine pathway for menaquinone biosynthesis.

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


1. Mahanta, N., Fedoseyenko, D., Dairi, T. and Begley, T.P. Menaquinone biosynthesis: formation of aminofutalosine requires a unique radical SAM enzyme. J. Am. Chem. Soc. 135 (2013) 15318-15321. [PMID: 24083939]

[EC created 2014]

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