ID   MSRA_LACSA              Reviewed;         259 AA.
AC   Q9SEC2;
DT   11-JAN-2001, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-2000, sequence version 1.
DT   03-AUG-2022, entry version 77.
DE   RecName: Full=Peptide methionine sulfoxide reductase;
DE            EC=1.8.4.11;
DE   AltName: Full=Peptide-methionine (S)-S-oxide reductase;
DE            Short=Peptide Met(O) reductase;
DE   AltName: Full=Protein-methionine-S-oxide reductase;
OS   Lactuca sativa (Garden lettuce).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; campanulids; Asterales; Asteraceae; Cichorioideae; Cichorieae;
OC   Lactucinae; Lactuca.
OX   NCBI_TaxID=4236;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. Chungchima;
RA   Lee G.P., Park K.W., Lee C.H., Kim C.S.;
RT   "Germanium induced gene in lettuce using suppression subtractive
RT   hybridization method.";
RL   Submitted (JUN-1999) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Has an important function as a repair enzyme for proteins
CC       that have been inactivated by oxidation. Catalyzes the reversible
CC       oxidation-reduction of methionine sulfoxide in proteins to methionine.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[thioredoxin]-disulfide + H2O + L-methionyl-[protein] =
CC         [thioredoxin]-dithiol + L-methionyl-(S)-S-oxide-[protein];
CC         Xref=Rhea:RHEA:14217, Rhea:RHEA-COMP:10698, Rhea:RHEA-COMP:10700,
CC         Rhea:RHEA-COMP:12313, Rhea:RHEA-COMP:12315, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:16044, ChEBI:CHEBI:29950, ChEBI:CHEBI:44120,
CC         ChEBI:CHEBI:50058; EC=1.8.4.11;
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[thioredoxin]-disulfide + H2O + L-methionine = [thioredoxin]-
CC         dithiol + L-methionine (S)-S-oxide; Xref=Rhea:RHEA:19993, Rhea:RHEA-
CC         COMP:10698, Rhea:RHEA-COMP:10700, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:29950, ChEBI:CHEBI:50058, ChEBI:CHEBI:57844,
CC         ChEBI:CHEBI:58772; EC=1.8.4.11;
CC   -!- SIMILARITY: Belongs to the MsrA Met sulfoxide reductase family.
CC       {ECO:0000305}.
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DR   EMBL; AF162204; AAF19789.1; -; mRNA.
DR   PRIDE; Q9SEC2; -.
DR   GO; GO:0033744; F:L-methionine:thioredoxin-disulfide S-oxidoreductase activity; IEA:RHEA.
DR   GO; GO:0008113; F:peptide-methionine (S)-S-oxide reductase activity; IEA:UniProtKB-EC.
DR   Gene3D; 3.30.1060.10; -; 1.
DR   HAMAP; MF_01401; MsrA; 1.
DR   InterPro; IPR002569; Met_Sox_Rdtase_MsrA_dom.
DR   InterPro; IPR036509; Met_Sox_Rdtase_MsrA_sf.
DR   Pfam; PF01625; PMSR; 1.
DR   SUPFAM; SSF55068; SSF55068; 1.
DR   TIGRFAMs; TIGR00401; msrA; 1.
PE   2: Evidence at transcript level;
KW   Oxidoreductase.
FT   CHAIN           1..259
FT                   /note="Peptide methionine sulfoxide reductase"
FT                   /id="PRO_0000138635"
FT   REGION          66..90
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   259 AA;  28841 MW;  2FF9BB31BE90543B CRC64;
     MFLLRTTTAT TTPASLPLPL LSISSHLSLS KPSSFPVTST KPLFTLRHSS STPKIMSWLG
     RLGXGTRTPA DASMDQSSIA QGPDDDIPAP GQQFAQFGAG CFWGVELAFQ RVPGVSKTEV
     GYTQGFLHNP TYNDICSGTT NHSEVVRVQY DPKACSFDSL LDCFWERHDP TTLNRQGNDV
     GTQYRSGIYF YTPEQEKAAI EAKERHQKKL NRTVVTEILP AKKFYRAEEY HQQYLAKGGR
     FGFRQSTEKG CNDPIRCYG