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Database: UniProt
Entry: Q75R63
LinkDB: Q75R63
Original site: Q75R63 
ID   NQRB_VIBAN              Reviewed;         414 AA.
AC   Q75R63;
DT   15-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2004, sequence version 1.
DT   26-NOV-2014, entry version 46.
DE   RecName: Full=Na(+)-translocating NADH-quinone reductase subunit B {ECO:0000255|HAMAP-Rule:MF_00426};
DE            Short=Na(+)-NQR subunit B {ECO:0000255|HAMAP-Rule:MF_00426};
DE            Short=Na(+)-translocating NQR subunit B {ECO:0000255|HAMAP-Rule:MF_00426};
DE            EC=1.6.5.- {ECO:0000255|HAMAP-Rule:MF_00426};
DE   AltName: Full=NQR complex subunit B {ECO:0000255|HAMAP-Rule:MF_00426};
DE   AltName: Full=NQR-1 subunit B {ECO:0000255|HAMAP-Rule:MF_00426};
GN   Name=nqrB {ECO:0000255|HAMAP-Rule:MF_00426};
OS   Vibrio anguillarum (Listonella anguillarum).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Vibrionales;
OC   Vibrionaceae; Vibrio.
OX   NCBI_TaxID=55601;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Fujiwara-Nagata E., Eguchi Y., Utsumi R., Eguchi M.;
RT   "Cloning, sequencing and transcriptional regulation of Na+-dependent
RT   NADH:quinone oxidoreductase gene of Vibrio anguillarum, a fish
RT   pathogen.";
RL   Submitted (JAN-2004) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: NQR complex catalyzes the reduction of ubiquinone-1 to
CC       ubiquinol by two successive reactions, coupled with the transport
CC       of Na(+) ions from the cytoplasm to the periplasm. NqrA to NqrE
CC       are probably involved in the second step, the conversion of
CC       ubisemiquinone to ubiquinol. {ECO:0000255|HAMAP-Rule:MF_00426}.
CC   -!- CATALYTIC ACTIVITY: NADH + ubiquinone + Na(+)(In) = NAD(+) +
CC       ubiquinol + Na(+)(Out). {ECO:0000255|HAMAP-Rule:MF_00426}.
CC   -!- COFACTOR:
CC       Name=FMN; Xref=ChEBI:CHEBI:58210;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00426};
CC   -!- SUBUNIT: Composed of six subunits; NqrA, NqrB, NqrC, NqrD, NqrE
CC       and NqrF. {ECO:0000255|HAMAP-Rule:MF_00426}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00426}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00426}.
CC   -!- SIMILARITY: Belongs to the NqrB/RnfD family. {ECO:0000255|HAMAP-
CC       Rule:MF_00426}.
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DR   EMBL; AB159077; BAD14949.1; -; Genomic_DNA.
DR   GO; GO:0009276; C:Gram-negative-bacterium-type cell wall; IEA:InterPro.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-HAMAP.
DR   GO; GO:0010181; F:FMN binding; IEA:InterPro.
DR   GO; GO:0016655; F:oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor; IEA:UniProtKB-HAMAP.
DR   GO; GO:0022904; P:respiratory electron transport chain; IEA:InterPro.
DR   GO; GO:0006814; P:sodium ion transport; IEA:UniProtKB-HAMAP.
DR   HAMAP; MF_00426; NqrB; 1.
DR   InterPro; IPR010966; NADH-UbQ_OxRdtase_suB.
DR   InterPro; IPR004338; NADH_Q_Rdtase_NQR2_RnfD.
DR   Pfam; PF03116; NQR2_RnfD_RnfE; 1.
DR   PIRSF; PIRSF016055; NADH-UbQ_OxRdtase_B_su; 1.
DR   TIGRFAMs; TIGR01937; nqrB; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Flavoprotein; FMN; Ion transport;
KW   Membrane; NAD; Oxidoreductase; Phosphoprotein; Sodium;
KW   Sodium transport; Transmembrane; Transmembrane helix; Transport;
KW   Ubiquinone.
FT   CHAIN         1    414       Na(+)-translocating NADH-quinone
FT                                reductase subunit B.
FT                                /FTId=PRO_0000074443.
FT   TRANSMEM     56     75       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   TRANSMEM     82    104       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   TRANSMEM    124    146       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   TRANSMEM    159    181       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   TRANSMEM    270    292       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   TRANSMEM    297    316       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   TRANSMEM    326    345       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   TRANSMEM    358    375       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   TRANSMEM    379    401       Helical. {ECO:0000255|HAMAP-
FT                                Rule:MF_00426}.
FT   MOD_RES     236    236       FMN phosphoryl threonine.
FT                                {ECO:0000255|HAMAP-Rule:MF_00426}.
SQ   SEQUENCE   414 AA;  45367 MW;  62C4DFB0A74BCED5 CRC64;
     MGLKKFLEDI EHHFEPGGKH EKWFALYEAA ATLFYTPGLV TKRSSHVRDS VDLKRIMIMV
     WLAVFPAMFW GMYNVGHQSI TALNHLYSGA ELATVISGNW HYWLTEMLGG TLSTQAGWAS
     MMLLGATYFL PIYATVFLVG GFWEVLFCMV RKHEVNEGFF VTSILFALIV PPTLPLWQAA
     LGITFGVVVA KEIFGGTGRN FLNPALAGRA FLFFAYPAQI SGDVVWTAAD GFSGATALSQ
     WAQGGNGALI NKVTGEAITW MDAFVGNIPG SIGEVSTLAL AIGAAFIVYM GIASWRIIAG
     VMVGMIAIST LFNVIGSDTN AMFNMPWHWH LVLGGFAFGM FFMATDPVSA SFTNKGKWAY
     GILIGAMCVM IRVVNPAYPE GMMLAILFAN LFAPLFDHIV IEKNIKRRLA RYGK
//
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