ID   NUOB_RHOCA              Reviewed;         177 AA.
AC   O84970;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   16-JUN-2009, entry version 40.
DE   RecName: Full=NADH-quinone oxidoreductase subunit B;
DE            EC=1.6.99.5;
DE   AltName: Full=NADH dehydrogenase I subunit B;
DE   AltName: Full=NDH-1 subunit B;
GN   Name=nuoB;
OS   Rhodobacter capsulatus (Rhodopseudomonas capsulata).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rhodobacterales;
OC   Rhodobacteraceae; Rhodobacter.
OX   NCBI_TaxID=1061;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 33303 / B10;
RA   Dupuis A., Issartel J.P.;
RL   Submitted (OCT-1997) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: NDH-1 shuttles electrons from NADH, via FMN and iron-
CC       sulfur (Fe-S) centers, to quinones in the respiratory chain. The
CC       immediate electron acceptor for the enzyme in this species is
CC       believed to be ubiquinone. Couples the redox reaction to proton
CC       translocation (for every two electrons transferred, four hydrogen
CC       ions are translocated across the cytoplasmic membrane), and thus
CC       conserves the redox energy in a proton gradient.
CC   -!- CATALYTIC ACTIVITY: NADH + quinone = NAD(+) + quinol.
CC   -!- COFACTOR: Binds 1 4Fe-4S cluster (By similarity).
CC   -!- SUBUNIT: NDH-1 is composed of 14 different subunits. Subunits
CC       nuoB, C, D, E, F, and G constitute the peripheral sector of the
CC       complex (By similarity).
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane; Peripheral membrane
CC       protein; Cytoplasmic side (By similarity).
CC   -!- SIMILARITY: Belongs to the complex I 20 kDa subunit family.
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DR   EMBL; AF029365; AAC24986.1; -; Genomic_DNA.
DR   BRENDA; 1.6.99.5; 567.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0005506; F:iron ion binding; IEA:HAMAP.
DR   GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; IEA:InterPro.
DR   GO; GO:0048038; F:quinone binding; IEA:UniProtKB-KW.
DR   GO; GO:0055114; P:oxidation reduction; IEA:HAMAP.
DR   GO; GO:0019684; P:photosynthesis, light reaction; IEA:HAMAP.
DR   GO; GO:0006810; P:transport; IEA:UniProtKB-KW.
DR   HAMAP; MF_01356; -; 1.
DR   InterPro; IPR006137; NADH_UbQ_OxRdtase-like_20kDa.
DR   InterPro; IPR006138; NADH_UbQ_OxRdtase_su-20kDa.
DR   InterPro; IPR014406; NiFe_hyd_3_ssu/Q_oxred_NuoB.
DR   PANTHER; PTHR11995:SF2; NADH_DH_20kDa; 1.
DR   PANTHER; PTHR11995; NiFe_hyd_3_ssu/Q_oxred_NuoB; 1.
DR   Pfam; PF01058; Oxidored_q6; 1.
DR   TIGRFAMs; TIGR01957; nuoB_fam; 1.
DR   PROSITE; PS01150; COMPLEX1_20K; 1.
PE   3: Inferred from homology;
KW   4Fe-4S; Cell inner membrane; Cell membrane; Iron; Iron-sulfur;
KW   Membrane; Metal-binding; NAD; Oxidoreductase; Quinone; Transport;
KW   Ubiquinone.
FT   CHAIN         1    177       NADH-quinone oxidoreductase subunit B.
FT                                /FTId=PRO_0000118777.
FT   METAL        56     56       Iron-sulfur (4Fe-4S) (Potential).
FT   METAL        57     57       Iron-sulfur (4Fe-4S) (Potential).
FT   METAL       121    121       Iron-sulfur (4Fe-4S) (Potential).
FT   METAL       151    151       Iron-sulfur (4Fe-4S) (Potential).
SQ   SEQUENCE   177 AA;  19509 MW;  1FD2E4879646AD85 CRC64;
     MGVMTGSNTA AVDMDVAAAA LNRDLQDKGF LLTTAEDIIN WARNGSLHWM TFGLACCAVE
     MMHTAMPRYD VERYGFAPRA SPRQSDVMIV AGTLTNKMAP ALRKVYDQMP EPRYVISMGS
     CANGGGYYHY SYSVVRGCDR IVPVDIYVPG CPPSAEALMY GILQLQRKIR RTGTLVR
//