IUBMB Enzyme Nomenclature


Accepted name: serine-type anaerobic sulfatase-maturating enzyme

Reaction: S-adenosyl-L-methionine + a [sulfatase]-L-serine = a [sulfatase]-3-oxo-L-alanine + 5'-deoxyadenosine + L-methionine

Glossary: 3-oxo-L-alanine = (S)-formylglycine = (S)-Cα-formylglycine = FGly

Other name(s): atsB (gene name)

Systematic name: [sulfatase]-L-serine:S-adenosyl-L-methionine oxidoreductase (3-oxo-L-alanine-forming)

Comments: A bacterial radical S-adenosyl-L-methionine (AdoMet) enzyme that contains three [4Fe-4S] clusters. The enzyme, found in some bacteria, activates a type I sulfatase enzyme (EC by converting a conserved L-serine residue in the active site to a unique 3-oxo-L-alanine residue that is essential for the sulfatase activity. While the enzyme from Klebsiella pneumoniae is specific for L-serine, the enzyme from Clostridium perfringens can also act on L-cysteine, see EC, cysteine-type anaerobic sulfatase-maturating enzyme.

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


1. Szameit, C., Miech, C., Balleininger, M., Schmidt, B., von Figura, K. and Dierks, T. The iron sulfur protein AtsB is required for posttranslational formation of formylglycine in the Klebsiella sulfatase. J. Biol. Chem. 274 (1999) 15375-15381. [PMID: 10336424]

2. Fang, Q., Peng, J. and Dierks, T. Post-translational formylglycine modification of bacterial sulfatases by the radical S-adenosylmethionine protein AtsB. J. Biol. Chem. 279 (2004) 14570-14578. [PMID: 14749327]

3. Grove, T.L., Lee, K.H., St Clair, J., Krebs, C. and Booker, S.J. In vitro characterization of AtsB, a radical SAM formylglycine-generating enzyme that contains three [4Fe-4S] clusters. Biochemistry 47 (2008) 7523-7538. [PMID: 18558715]

[EC created 2020]

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