ID   NUOB1_CYTH3             Reviewed;         178 AA.
AC   Q11XR8;
DT   26-MAY-2009, integrated into UniProtKB/Swiss-Prot.
DT   26-MAY-2009, sequence version 2.
DT   03-AUG-2022, entry version 91.
DE   RecName: Full=NADH-quinone oxidoreductase subunit B 1 {ECO:0000255|HAMAP-Rule:MF_01356};
DE            EC=7.1.1.- {ECO:0000255|HAMAP-Rule:MF_01356};
DE   AltName: Full=NADH dehydrogenase I subunit B 1 {ECO:0000255|HAMAP-Rule:MF_01356};
DE   AltName: Full=NDH-1 subunit B 1 {ECO:0000255|HAMAP-Rule:MF_01356};
GN   Name=nuoB1 {ECO:0000255|HAMAP-Rule:MF_01356}; OrderedLocusNames=CHU_0510;
OS   Cytophaga hutchinsonii (strain ATCC 33406 / DSM 1761 / CIP 103989 / NBRC
OS   15051 / NCIMB 9469 / D465).
OC   Bacteria; Bacteroidetes; Cytophagia; Cytophagales; Cytophagaceae;
OC   Cytophaga.
OX   NCBI_TaxID=269798;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 33406 / DSM 1761 / CIP 103989 / NBRC 15051 / NCIMB 9469 / D465;
RX   PubMed=17400776; DOI=10.1128/aem.00225-07;
RA   Xie G., Bruce D.C., Challacombe J.F., Chertkov O., Detter J.C., Gilna P.,
RA   Han C.S., Lucas S., Misra M., Myers G.L., Richardson P., Tapia R.,
RA   Thayer N., Thompson L.S., Brettin T.S., Henrissat B., Wilson D.B.,
RA   McBride M.J.;
RT   "Genome sequence of the cellulolytic gliding bacterium Cytophaga
RT   hutchinsonii.";
RL   Appl. Environ. Microbiol. 73:3536-3546(2007).
CC   -!- FUNCTION: NDH-1 shuttles electrons from NADH, via FMN and iron-sulfur
CC       (Fe-S) centers, to quinones in the respiratory chain. The immediate
CC       electron acceptor for the enzyme in this species is believed to be a
CC       menaquinone. Couples the redox reaction to proton translocation (for
CC       every two electrons transferred, four hydrogen ions are translocated
CC       across the cytoplasmic membrane), and thus conserves the redox energy
CC       in a proton gradient. {ECO:0000255|HAMAP-Rule:MF_01356}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a quinone + 5 H(+)(in) + NADH = a quinol + 4 H(+)(out) +
CC         NAD(+); Xref=Rhea:RHEA:57888, ChEBI:CHEBI:15378, ChEBI:CHEBI:24646,
CC         ChEBI:CHEBI:57540, ChEBI:CHEBI:57945, ChEBI:CHEBI:132124;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01356};
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01356};
CC       Note=Binds 1 [4Fe-4S] cluster. {ECO:0000255|HAMAP-Rule:MF_01356};
CC   -!- SUBUNIT: NDH-1 is composed of 14 different subunits. Subunits NuoB, C,
CC       D, E, F, and G constitute the peripheral sector of the complex.
CC       {ECO:0000255|HAMAP-Rule:MF_01356}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000255|HAMAP-
CC       Rule:MF_01356}; Peripheral membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_01356}; Cytoplasmic side {ECO:0000255|HAMAP-Rule:MF_01356}.
CC   -!- SIMILARITY: Belongs to the complex I 20 kDa subunit family.
CC       {ECO:0000255|HAMAP-Rule:MF_01356}.
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DR   EMBL; CP000383; ABG57798.1; -; Genomic_DNA.
DR   RefSeq; WP_041932144.1; NZ_FPJX01000001.1.
DR   AlphaFoldDB; Q11XR8; -.
DR   SMR; Q11XR8; -.
DR   STRING; 269798.CHU_0510; -.
DR   EnsemblBacteria; ABG57798; ABG57798; CHU_0510.
DR   KEGG; chu:CHU_0510; -.
DR   eggNOG; COG0377; Bacteria.
DR   HOGENOM; CLU_055737_7_3_10; -.
DR   OrthoDB; 1904620at2; -.
DR   Proteomes; UP000001822; Chromosome.
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:UniProtKB-UniRule.
DR   GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; IEA:InterPro.
DR   GO; GO:0048038; F:quinone binding; IEA:UniProtKB-KW.
DR   HAMAP; MF_01356; NDH1_NuoB; 1.
DR   InterPro; IPR006137; NADH_UbQ_OxRdtase-like_20kDa.
DR   InterPro; IPR006138; NADH_UQ_OxRdtase_20Kd_su.
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; Membrane;
KW   Metal-binding; NAD; Quinone; Reference proteome; Translocase; Transport.
FT   CHAIN           1..178
FT                   /note="NADH-quinone oxidoreductase subunit B 1"
FT                   /id="PRO_0000376190"
FT   BINDING         39
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT   BINDING         40
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT   BINDING         104
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT   BINDING         135
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
SQ   SEQUENCE   178 AA;  19949 MW;  19BD97D86E7E9DE3 CRC64;
     MSLLDHKFGQ GGIVVSQLED VLNWARLSSL FPMSFGLACC AIEMMQTFTS GYDLDRFGVI
     PRPSPRQSDV MIVAGTVTFK MADRIRRLYE QMPEPRYVIS MGSCSNCGGP YWEHGYHVVK
     GVDRIVPVDI YVPGCPPRPE ALIGGFLKLQ EKIRKETLVA PKAVERFLET HAKEKNIA