ID A0A178K2C0_9GAMM Unreviewed; 210 AA.
AC A0A178K2C0;
DT 07-SEP-2016, integrated into UniProtKB/TrEMBL.
DT 07-SEP-2016, sequence version 1.
DT 24-JAN-2024, entry version 28.
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=A3K86_21040 {ECO:0000313|EMBL:OAN11431.1};
OS Photobacterium jeanii.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Vibrionales; Vibrionaceae;
OC Photobacterium.
OX NCBI_TaxID=858640 {ECO:0000313|EMBL:OAN11431.1, ECO:0000313|Proteomes:UP000078503};
RN [1] {ECO:0000313|EMBL:OAN11431.1, ECO:0000313|Proteomes:UP000078503}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=R-40508 {ECO:0000313|EMBL:OAN11431.1,
RC ECO:0000313|Proteomes:UP000078503};
RA Li Y.;
RT "Photobacterium proteolyticum sp. nov. a protease producing bacterium
RT isolated from ocean sediments of Laizhou Bay.";
RL Submitted (MAR-2016) 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}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:OAN11431.1}.
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DR EMBL; LVHF01000033; OAN11431.1; -; Genomic_DNA.
DR RefSeq; WP_068336219.1; NZ_PYMD01000002.1.
DR AlphaFoldDB; A0A178K2C0; -.
DR STRING; 858640.A3K86_21040; -.
DR OrthoDB; 9788328at2; -.
DR Proteomes; UP000078503; 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|ARBA:ARBA00022617, 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:UP000078503};
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 9..30
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 50..68
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 80..98
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 118..137
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 149..166
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT TRANSMEM 172..190
FT /note="Helical"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01207"
FT DOMAIN 48..159
FT /note="Ferric oxidoreductase"
FT /evidence="ECO:0000259|Pfam:PF01794"
SQ SEQUENCE 210 AA; 24013 MW; 618CD96E4ED15101 CRC64;
MRLTPKHITY LKVVIHAVSL GFFTLLVLGV FNGSLGADPT EGISHFTGKA ALNTLIITLL
VSPIAKRFKQ SALMRVRRVI GLYSFFWAGL HLASYALLDL SLNWSLLGSE IISRPYLAVG
AVSWVILFLL TLTSNQYMQR YLGKRWQTLH NYVYVAVILS PIHYYWSVKS GLLEPAIYIV
ISFFLLALRW QTFKRWLPMH WFTLKTTSTN
//
