show all | hide all No of entries

Information on EC 1.8.4.11 - peptide-methionine (S)-S-oxide reductase

for references in articles please use BRENDA:EC1.8.4.11
Please wait a moment until all data is loaded. This message will disappear when all data is loaded.
EC Tree
IUBMB Comments
The reaction occurs in the reverse direction to that shown above. The enzyme exhibits high specificity for the reduction of the S-form of L-methionine S-oxide, acting faster on the residue in a peptide than on the free amino acid . On the free amino acid, it can also reduce D-methionine (S)-S-oxide but more slowly . The enzyme plays a role in preventing oxidative-stress damage caused by reactive oxygen species by reducing the oxidized form of methionine back to methionine and thereby reactivating peptides that had been damaged. In some species, e.g. Neisseria meningitidis, both this enzyme and EC 1.8.4.12, peptide-methionine (R)-S-oxide reductase, are found within the same protein whereas, in other species, they are separate proteins [1,4]. The reaction proceeds via a sulfenic-acid intermediate [5,10].
Specify your search results
Select one or more organisms in this record:
The expected taxonomic range for this enzyme is: Bacteria, Eukaryota, Archaea
Synonyms
methionine sulfoxide reductase a, msra2, methionine sulfoxide reductases a, msra-1, methionine-s-sulfoxide reductase, peptide methionine sulphoxide reductase, methionine sulphoxide reductase a, peptide methionine sulfoxide reductase a, peptide-methionine sulfoxide reductase, pmsra, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
L-methionine (S)-sulfoxide + thioredoxin = L-methionine + thioredoxin disulfide + H2O
show the reaction diagram
L-methionine + thioredoxin disulfide + H2O = L-methionine (S)-S-oxide + thioredoxin
show the reaction diagram
peptide-L-methionine + thioredoxin disulfide + H2O = peptide-L-methionine (S)-S-oxide + thioredoxin
show the reaction diagram