ID   MSRB2_RHIME             Reviewed;         147 AA.
AC   Q92Y46;
DT   02-MAY-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   25-MAY-2022, entry version 115.
DE   RecName: Full=Peptide methionine sulfoxide reductase MsrB 2;
DE            EC=1.8.4.12;
DE   AltName: Full=Peptide-methionine (R)-S-oxide reductase 2;
GN   Name=msrB2; OrderedLocusNames=RA1042; ORFNames=SMa1894;
OS   Rhizobium meliloti (strain 1021) (Ensifer meliloti) (Sinorhizobium
OS   meliloti).
OG   Plasmid pSymA (megaplasmid 1).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Rhizobiaceae; Sinorhizobium/Ensifer group; Sinorhizobium.
OX   NCBI_TaxID=266834;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=1021;
RX   PubMed=11481432; DOI=10.1073/pnas.161294798;
RA   Barnett M.J., Fisher R.F., Jones T., Komp C., Abola A.P., Barloy-Hubler F.,
RA   Bowser L., Capela D., Galibert F., Gouzy J., Gurjal M., Hong A., Huizar L.,
RA   Hyman R.W., Kahn D., Kahn M.L., Kalman S., Keating D.H., Palm C.,
RA   Peck M.C., Surzycki R., Wells D.H., Yeh K.-C., Davis R.W., Federspiel N.A.,
RA   Long S.R.;
RT   "Nucleotide sequence and predicted functions of the entire Sinorhizobium
RT   meliloti pSymA megaplasmid.";
RL   Proc. Natl. Acad. Sci. U.S.A. 98:9883-9888(2001).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=1021;
RX   PubMed=11474104; DOI=10.1126/science.1060966;
RA   Galibert F., Finan T.M., Long S.R., Puehler A., Abola P., Ampe F.,
RA   Barloy-Hubler F., Barnett M.J., Becker A., Boistard P., Bothe G.,
RA   Boutry M., Bowser L., Buhrmester J., Cadieu E., Capela D., Chain P.,
RA   Cowie A., Davis R.W., Dreano S., Federspiel N.A., Fisher R.F., Gloux S.,
RA   Godrie T., Goffeau A., Golding B., Gouzy J., Gurjal M., Hernandez-Lucas I.,
RA   Hong A., Huizar L., Hyman R.W., Jones T., Kahn D., Kahn M.L., Kalman S.,
RA   Keating D.H., Kiss E., Komp C., Lelaure V., Masuy D., Palm C., Peck M.C.,
RA   Pohl T.M., Portetelle D., Purnelle B., Ramsperger U., Surzycki R.,
RA   Thebault P., Vandenbol M., Vorhoelter F.J., Weidner S., Wells D.H.,
RA   Wong K., Yeh K.-C., Batut J.;
RT   "The composite genome of the legume symbiont Sinorhizobium meliloti.";
RL   Science 293:668-672(2001).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[thioredoxin]-disulfide + H2O + L-methionyl-[protein] =
CC         [thioredoxin]-dithiol + L-methionyl-(R)-S-oxide-[protein];
CC         Xref=Rhea:RHEA:24164, Rhea:RHEA-COMP:10698, Rhea:RHEA-COMP:10700,
CC         Rhea:RHEA-COMP:12313, Rhea:RHEA-COMP:12314, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:16044, ChEBI:CHEBI:29950, ChEBI:CHEBI:45764,
CC         ChEBI:CHEBI:50058; EC=1.8.4.12;
CC   -!- SIMILARITY: Belongs to the MsrB Met sulfoxide reductase family.
CC       {ECO:0000305}.
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DR   EMBL; AE006469; AAK65700.1; -; Genomic_DNA.
DR   PIR; B95392; B95392.
DR   RefSeq; NP_436288.1; NC_003037.1.
DR   RefSeq; WP_010967999.1; NC_003037.1.
DR   AlphaFoldDB; Q92Y46; -.
DR   SMR; Q92Y46; -.
DR   EnsemblBacteria; AAK65700; AAK65700; SMa1894.
DR   GeneID; 61599788; -.
DR   KEGG; sme:SMa1894; -.
DR   PATRIC; fig|266834.11.peg.1078; -.
DR   HOGENOM; CLU_031040_8_5_5; -.
DR   OMA; RTEEHCA; -.
DR   Proteomes; UP000001976; Plasmid pSymA.
DR   GO; GO:0033743; F:peptide-methionine (R)-S-oxide reductase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0030091; P:protein repair; IEA:InterPro.
DR   GO; GO:0006979; P:response to oxidative stress; IEA:InterPro.
DR   HAMAP; MF_01400; MsrB; 1.
DR   InterPro; IPR028427; Met_Sox_Rdtase_MsrB.
DR   InterPro; IPR002579; Met_Sox_Rdtase_MsrB_dom.
DR   InterPro; IPR011057; Mss4-like_sf.
DR   PANTHER; PTHR10173; PTHR10173; 1.
DR   Pfam; PF01641; SelR; 1.
DR   SUPFAM; SSF51316; SSF51316; 1.
DR   TIGRFAMs; TIGR00357; TIGR00357; 1.
DR   PROSITE; PS51790; MSRB; 1.
PE   3: Inferred from homology;
KW   Oxidoreductase; Plasmid; Reference proteome.
FT   CHAIN           1..147
FT                   /note="Peptide methionine sulfoxide reductase MsrB 2"
FT                   /id="PRO_0000140291"
FT   DOMAIN          6..129
FT                   /note="MsrB"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01126"
FT   ACT_SITE        118
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01126"
SQ   SEQUENCE   147 AA;  16534 MW;  98C59A3B1911C86B CRC64;
     MTYRKTDEEV SKLTPEQYRV TQQNGTERPF TGEYTDNKRP GIYVDIVSGE PLFASADKFD
     SGCGWPSFTK PIVPANVNEL RDNSHGMIRT EVRSAHGDSH LGHVFPDGPQ DRGGLRYCIN
     SAALRFIPRE EMEAEGYGGY FNQVEDI