oxidoreductase activity, acting on a sulfur group of donors, disulfide as acceptor L-methionine (S)-S-oxide reductase activity https://github.com/geneontology/go-ontology/issues/30723 L-methionine-(S)-S-oxide reductase activity molecular_function L-methionine:thioredoxin-disulfide S-oxidoreductase activity acetylmethionine sulfoxide reductase activity L-methionine:oxidized-thioredoxin S-oxidoreductase activity methionine sulfoxide reductase activity GO:0000317 Catalysis of the reaction: [thioredoxin]-disulfide + L-methionine + H2O = L-methionine (S)-S-oxide + [thioredoxin]-dithiol. methyl sulfoxide reductase I and II activity KEGG_REACTION:R07606 GO:0033744 free-methionine (S)-S-oxide reductase activity fSMsr EC:1.8.4.13 methionine-S-oxide reductase activity RHEA:19993 MetaCyc:1.8.4.13-RXN