Reaction: L-methionine + thioredoxin disulfide + H2O = L-methionine (R)-S-oxide + thioredoxin
For diagram click here and mechanism click here.
Other name(s): fRMsr; FRMsr; free met-R-(o) reductase; free-methionine (R)-S-oxide reductase
Systematic name: L-methionine:thioredoxin-disulfide S-oxidoreductase [L-methionine (R)-S-oxide-forming]
Comments: Requires NADPH. Unlike EC 188.8.131.52, peptide-methionine (R)-S-oxide reductase, this enzyme cannot use peptide-bound methionine (R)-S-oxide as a substrate . Differs from EC 184.108.40.206, L-methionine (S)-S-oxide in that L-methionine (S)-S-oxide is not a substrate.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 945954-12-1
1. Etienne, F., Spector, D., Brot, N. and Weissbach, H. A methionine sulfoxide reductase in Escherichia coli that reduces the R enantiomer of methionine sulfoxide. Biochem. Biophys. Res. Commun. 300 (2003) 378-382. [PMID: 12504094]