OBSOLETE. Catalysis of the reaction: L-methionine R-oxide + thioredoxin = L-methionine + thioredoxin disulfide; can act on free oxidized methionine with specificity for the R enantiomer; does not act on oxidized methionine in peptide linkage. Thioredoxin disulfide is the oxidized form of thioredoxin.
Source:PMID:17535911,
GOC:mcc,
PMID:19049972
Comment
The reason for obsoletion is that this term is equivalent to GO:0033745 L-methionine-(R)-S-oxide reductase activity.