IUBMB Enzyme Nomenclature


Accepted name: (R)-S-adenosyl-L-methionine hydrolase (adenosine-forming)

Reaction: (R)-S-adenosyl-L-methionine + H2O = adenosine + L-methionine

Other name(s): SAM hydroxide adenosyltransferase

Systematic name: (R)-S-adenosyl-L-methionine hydrolase (adenosine-forming)

Comments: The enzyme, found in bacteria and archaea, is involved in removing the (R) isomer of S-adenosyl-L-methionine from the cell. It catalyses a nucleophilic attack of water at the C5' carbon of S-adenosyl-L-methionine to generate adenosine and L-methionine.

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


1. Eustaquio, A.S., Harle, J., Noel, J.P. and Moore, B.S. S-Adenosyl-L-methionine hydrolase (adenosine-forming), a conserved bacterial and archaeal protein related to SAM-dependent halogenases. ChemBioChem 9 (2008) 2215-2219. [PMID: 18720493]

2. Deng, H., McMahon, S.A., Eustaquio, A.S., Moore, B.S., Naismith, J.H. and O'Hagan, D. Mechanistic insights into water activation in SAM hydroxide adenosyltransferase (duf-62). ChemBioChem 10 (2009) 2455-2459. [PMID: 19739191]

3. Kornfuehrer, T., Romanowski, S., de Crecy-Lagard, V., Hanson, A.D. and Eustaquio, A.S. An enzyme containing the conserved domain of unknown function DUF62 acts as a stereoselective (Rs ,Sc)-S-adenosylmethionine hydrolase. Chembiochem 21 (2020) 3495-3499. [PMID: 32776704]

[EC created 2018 as EC, transferred 2022 to EC]

Return to EC 3.13.2 home page
Return to EC 3.13 home page
Return to EC 3 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page