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NQRB_CHRSD
ID   NQRB_CHRSD              Reviewed;         411 AA.
AC   Q1QX85;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   16-MAY-2006, sequence version 1.
DT   25-MAY-2022, entry version 103.
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=7.2.1.1 {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}; OrderedLocusNames=Csal_1570;
OS   Chromohalobacter salexigens (strain ATCC BAA-138 / DSM 3043 / CIP 106854 /
OS   NCIMB 13768 / 1H11).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Oceanospirillales;
OC   Halomonadaceae; Chromohalobacter.
OX   NCBI_TaxID=290398;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-138 / DSM 3043 / CIP 106854 / NCIMB 13768 / 1H11;
RX   PubMed=22675587; DOI=10.4056/sigs.2285059;
RA   Copeland A., O'Connor K., Lucas S., Lapidus A., Berry K.W., Detter J.C.,
RA   Del Rio T.G., Hammon N., Dalin E., Tice H., Pitluck S., Bruce D.,
RA   Goodwin L., Han C., Tapia R., Saunders E., Schmutz J., Brettin T.,
RA   Larimer F., Land M., Hauser L., Vargas C., Nieto J.J., Kyrpides N.C.,
RA   Ivanova N., Goker M., Klenk H.P., Csonka L.N., Woyke T.;
RT   "Complete genome sequence of the halophilic and highly halotolerant
RT   Chromohalobacter salexigens type strain (1H11(T)).";
RL   Stand. Genomic Sci. 5:379-388(2011).
CC   -!- FUNCTION: NQR complex catalyzes the reduction of ubiquinone-1 to
CC       ubiquinol by two successive reactions, coupled with the transport of
CC       Na(+) ions from the cytoplasm to the periplasm. NqrA to NqrE are
CC       probably involved in the second step, the conversion of ubisemiquinone
CC       to ubiquinol. {ECO:0000255|HAMAP-Rule:MF_00426}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a ubiquinone + H(+) + n Na(+)(in) + NADH = a ubiquinol + n
CC         Na(+)(out) + NAD(+); Xref=Rhea:RHEA:47748, Rhea:RHEA-COMP:9565,
CC         Rhea:RHEA-COMP:9566, ChEBI:CHEBI:15378, ChEBI:CHEBI:16389,
CC         ChEBI:CHEBI:17976, ChEBI:CHEBI:29101, ChEBI:CHEBI:57540,
CC         ChEBI:CHEBI:57945; EC=7.2.1.1; Evidence={ECO:0000255|HAMAP-
CC         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 and
CC       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; CP000285; ABE58923.1; -; Genomic_DNA.
DR   RefSeq; WP_011506869.1; NC_007963.1.
DR   AlphaFoldDB; Q1QX85; -.
DR   SMR; Q1QX85; -.
DR   STRING; 290398.Csal_1570; -.
DR   EnsemblBacteria; ABE58923; ABE58923; Csal_1570.
DR   KEGG; csa:Csal_1570; -.
DR   eggNOG; COG1805; Bacteria.
DR   HOGENOM; CLU_042020_1_1_6; -.
DR   OMA; FNPAYPE; -.
DR   OrthoDB; 1654433at2; -.
DR   Proteomes; UP000000239; Chromosome.
DR   GO; GO:0016021; C:integral component of 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:UniProtKB-UniRule.
DR   GO; GO:0022904; P:respiratory electron transport chain; IEA:InterPro.
DR   GO; GO:0006814; P:sodium ion transport; IEA:UniProtKB-UniRule.
DR   GO; GO:0055085; P:transmembrane transport; IEA:InterPro.
DR   HAMAP; MF_00426; NqrB; 1.
DR   InterPro; IPR010966; NqrB.
DR   InterPro; IPR004338; NqrB/RnfD.
DR   PANTHER; PTHR30578; PTHR30578; 1.
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; Phosphoprotein; Reference proteome; Sodium;
KW   Sodium transport; Translocase; Transmembrane; Transmembrane helix;
KW   Transport; Ubiquinone.
FT   CHAIN           1..411
FT                   /note="Na(+)-translocating NADH-quinone reductase subunit
FT                   B"
FT                   /id="PRO_1000060137"
FT   TRANSMEM        56..76
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
FT   TRANSMEM        121..141
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
FT   TRANSMEM        161..181
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
FT   TRANSMEM        254..274
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
FT   TRANSMEM        284..304
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
FT   TRANSMEM        309..329
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
FT   TRANSMEM        345..365
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
FT   TRANSMEM        368..388
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
FT   MOD_RES         228
FT                   /note="FMN phosphoryl threonine"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00426"
SQ   SEQUENCE   411 AA;  44600 MW;  D95ADEF1CB202F21 CRC64;
     MGIRNTLDKL EPHFHQGGKY EKFYALYEAV DTIFYSPPSV TKSTAHVRDG IDLKRIMITV
     WLCTFPAMFF GMYNAGLQAN MAIGDGFGAL GGWREAVTMA LAGSHDPGSI WANFVLGATY
     FLPIYLVTFA VGGFWEVLFA VKRGHEVNEG FFVTSVLYAL ILPATIPLWQ VALGITFGVV
     IGKEIFGGTG KNFLNPALTG RAFLYFAYPA QISGDSVWVA ADGYTGATAL STAAQNGMSA
     VQQAYSWWDA FLGFIPGSVG ETSTLAILIG AAVLLITRIA SWRIMLGVFV GMALTAMLFT
     AIGSESNPMF GMPWYWHLVL GGFAFGMVFM ATDPVSASMT DPGKLLFGFL IGVMTVLIRV
     VNPAFPEGIM LAILFANLFA PMIDHFFVQA NIKRRMKRDA AYSPATNEET A
 
 
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