ID A0A1X7P6J3_9RHOB Unreviewed; 207 AA.
AC A0A1X7P6J3;
DT 05-JUL-2017, integrated into UniProtKB/TrEMBL.
DT 05-JUL-2017, sequence version 1.
DT 24-JAN-2024, entry version 16.
DE RecName: Full=Protein-methionine-sulfoxide reductase heme-binding subunit MsrQ {ECO:0000256|HAMAP-Rule:MF_01207};
DE AltName: Full=Flavocytochrome MsrQ {ECO:0000256|HAMAP-Rule:MF_01207};
GN Name=msrQ {ECO:0000256|HAMAP-Rule:MF_01207};
GN ORFNames=SAMN05661107_1737 {ECO:0000313|EMBL:SMH46429.1};
OS Maritimibacter sp. HL-12.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC Roseobacteraceae; Maritimibacter.
OX NCBI_TaxID=1162418 {ECO:0000313|EMBL:SMH46429.1, ECO:0000313|Proteomes:UP000193836};
RN [1] {ECO:0000313|EMBL:SMH46429.1, ECO:0000313|Proteomes:UP000193836}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=HL-12 {ECO:0000313|EMBL:SMH46429.1,
RC ECO:0000313|Proteomes:UP000193836};
RA Afonso C.L., Miller P.J., Scott M.A., Spackman E., Goraichik I.,
RA Dimitrov K.M., Suarez D.L., Swayne D.E.;
RL Submitted (APR-2017) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Part of the MsrPQ system that repairs oxidized periplasmic
CC proteins containing methionine sulfoxide residues (Met-O), using
CC respiratory chain electrons. Thus protects these proteins from
CC oxidative-stress damage caused by reactive species of oxygen and
CC chlorine generated by the host defense mechanisms. MsrPQ is essential
CC for the maintenance of envelope integrity under bleach stress, rescuing
CC a wide series of structurally unrelated periplasmic proteins from
CC methionine oxidation. MsrQ provides electrons for reduction to the
CC reductase catalytic subunit MsrP, using the quinone pool of the
CC respiratory chain. {ECO:0000256|HAMAP-Rule:MF_01207}.
CC -!- COFACTOR:
CC Name=FMN; Xref=ChEBI:CHEBI:58210;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01207};
CC Note=Binds 1 FMN per subunit. {ECO:0000256|HAMAP-Rule:MF_01207};
CC -!- COFACTOR:
CC Name=heme b; Xref=ChEBI:CHEBI:60344;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01207};
CC Note=Binds 1 heme b (iron(II)-protoporphyrin IX) group per subunit.
CC {ECO:0000256|HAMAP-Rule:MF_01207};
CC -!- SUBUNIT: Heterodimer of a catalytic subunit (MsrP) and a heme-binding
CC subunit (MsrQ). {ECO:0000256|HAMAP-Rule:MF_01207}.
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000256|HAMAP-Rule:MF_01207};
CC Multi-pass membrane protein {ECO:0000256|HAMAP-Rule:MF_01207}. Membrane
CC {ECO:0000256|ARBA:ARBA00004141}; Multi-pass membrane protein
CC {ECO:0000256|ARBA:ARBA00004141}.
CC -!- SIMILARITY: Belongs to the MsrQ family. {ECO:0000256|HAMAP-
CC Rule:MF_01207}.
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DR EMBL; FXBQ01000001; SMH46429.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1X7P6J3; -.
DR STRING; 1162418.SAMN05661107_1737; -.
DR OrthoDB; 9788328at2; -.
DR Proteomes; UP000193836; Unassembled WGS sequence.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0009055; F:electron transfer activity; IEA:UniProtKB-UniRule.
DR GO; GO:0010181; F:FMN binding; IEA:UniProtKB-UniRule.
DR GO; GO:0020037; F:heme binding; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0030091; P:protein repair; IEA:UniProtKB-UniRule.
DR HAMAP; MF_01207; MsrQ; 1.
DR InterPro; IPR013130; Fe3_Rdtase_TM_dom.
DR InterPro; IPR022837; MsrQ-like.
DR PANTHER; PTHR36964; PROTEIN-METHIONINE-SULFOXIDE REDUCTASE HEME-BINDING SUBUNIT MSRQ; 1.
DR PANTHER; PTHR36964:SF1; PROTEIN-METHIONINE-SULFOXIDE REDUCTASE HEME-BINDING SUBUNIT MSRQ; 1.
DR Pfam; PF01794; Ferric_reduct; 1.
PE 3: Inferred from homology;
KW Cell membrane {ECO:0000256|HAMAP-Rule:MF_01207};
KW Electron transport {ECO:0000256|HAMAP-Rule:MF_01207};
KW Flavoprotein {ECO:0000256|HAMAP-Rule:MF_01207};
KW FMN {ECO:0000256|HAMAP-Rule:MF_01207};
KW Heme {ECO:0000256|HAMAP-Rule:MF_01207};
KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|HAMAP-Rule:MF_01207};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|HAMAP-Rule:MF_01207};
KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_01207};
KW Reference proteome {ECO:0000313|Proteomes:UP000193836};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692, ECO:0000256|HAMAP-
KW Rule:MF_01207};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989, ECO:0000256|HAMAP-
KW Rule:MF_01207};
KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|HAMAP-Rule:MF_01207}.
FT TRANSMEM 19..39
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 51..71
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 83..101
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 121..141
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 153..169
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 175..192
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT DOMAIN 52..162
FT /note="Ferric oxidoreductase"
FT /evidence="ECO:0000259|Pfam:PF01794"
SQ SEQUENCE 207 AA; 23409 MW; 4E2BC1ACC51BA32C CRC64;
MPVIEAVNAG LRRVPTWPVY VVGALPPVWY FYLGLTGGLG AEPISEMEHR LGLLGLQFLL
LGLAITPLRR FAGINLIRFR RAIGLLAFYY ISTHLLTWLL LDIRDPARIW ADIVKRPYIT
IGMAGFLLLV PLAATSSNAA VRRLGKRWRQ LHWLVYPAVL LGAVHFVMLR KGWQIEPLVY
LAIAVILLAL RLRIRWVTAV MRPDSGR
//
