This enzyme belongs to the family of oxidoreductases, specifically those acting on a sulfur group of donors with a disulfide as acceptor. The systematic name of this enzyme class is L-methionine:thioredoxin-disulfide S-oxidoreductase [L-methionine (R)-S-oxide-forming]. Other names in common use include fRMsr, FRMsr, free met-R-(o) reductase, and free-methionine (R)-S-oxide reductase. This enzyme participates in methionine metabolism.
References
Etienne F, Spector D, Brot N, Weissbach H (2003). "A methionine sulfoxide reductase in Escherichia coli that reduces the R enantiomer of methionine sulfoxide". Biochem. Biophys. Res. Commun. 300 (2): 378–82. doi:10.1016/S0006-291X(02)02870-X. PMID12504094.