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 03-APR-2013, entry version 41.
DE RecName: Full=Na(+)-translocating NADH-quinone reductase subunit B;
DE Short=Na(+)-NQR subunit B;
DE Short=Na(+)-translocating NQR subunit B;
DE EC=1.6.5.-;
DE AltName: Full=NQR complex subunit B;
DE AltName: Full=NQR-1 subunit B;
GN Name=nqrB;
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 (By similarity).
CC -!- CATALYTIC ACTIVITY: NADH + ubiquinone + Na(+)(In) = NAD(+) +
CC ubiquinol + Na(+)(Out).
CC -!- COFACTOR: FMN (By similarity).
CC -!- SUBUNIT: Composed of six subunits; NqrA, NqrB, NqrC, NqrD, NqrE
CC and NqrF (By similarity).
CC -!- SUBCELLULAR LOCATION: Cell inner membrane; Multi-pass membrane
CC protein (Potential).
CC -!- SIMILARITY: Belongs to the NqrB/RnfD family.
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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 to membrane; IEA:UniProtKB-KW.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
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:HAMAP.
DR GO; GO:0022904; P:respiratory electron transport chain; IEA:InterPro.
DR GO; GO:0006814; P:sodium ion transport; IEA: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; (Potential).
FT TRANSMEM 82 104 Helical; (Potential).
FT TRANSMEM 124 146 Helical; (Potential).
FT TRANSMEM 159 181 Helical; (Potential).
FT TRANSMEM 270 292 Helical; (Potential).
FT TRANSMEM 297 316 Helical; (Potential).
FT TRANSMEM 326 345 Helical; (Potential).
FT TRANSMEM 358 375 Helical; (Potential).
FT TRANSMEM 379 401 Helical; (Potential).
FT MOD_RES 236 236 FMN phosphoryl threonine (By similarity).
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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