ID   NUOB1_SALTO             Reviewed;         188 AA.
AC   A4X1X5;
DT   26-MAY-2009, integrated into UniProtKB/Swiss-Prot.
DT   29-MAY-2007, sequence version 1.
DT   03-AUG-2022, entry version 92.
DE   RecName: Full=NADH-quinone oxidoreductase subunit B 1;
DE            EC=7.1.1.-;
DE   AltName: Full=NADH dehydrogenase I subunit B 1;
DE   AltName: Full=NDH-1 subunit B 1;
GN   Name=nuoB1; OrderedLocusNames=Strop_0390;
OS   Salinispora tropica (strain ATCC BAA-916 / DSM 44818 / CNB-440).
OC   Bacteria; Actinobacteria; Micromonosporales; Micromonosporaceae;
OC   Salinispora.
OX   NCBI_TaxID=369723;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-916 / DSM 44818 / CNB-440;
RX   PubMed=17563368; DOI=10.1073/pnas.0700962104;
RA   Udwary D.W., Zeigler L., Asolkar R.N., Singan V., Lapidus A., Fenical W.,
RA   Jensen P.R., Moore B.S.;
RT   "Genome sequencing reveals complex secondary metabolome in the marine
RT   actinomycete Salinispora tropica.";
RL   Proc. Natl. Acad. Sci. U.S.A. 104:10376-10381(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:0000250}.
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   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883; Evidence={ECO:0000250};
CC       Note=Binds 1 [4Fe-4S] cluster. {ECO:0000250};
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 (By
CC       similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000250}; Peripheral membrane
CC       protein {ECO:0000250}; Cytoplasmic side {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the complex I 20 kDa subunit family.
CC       {ECO:0000305}.
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DR   EMBL; CP000667; ABP52875.1; -; Genomic_DNA.
DR   RefSeq; WP_011904309.1; NC_009380.1.
DR   AlphaFoldDB; A4X1X5; -.
DR   SMR; A4X1X5; -.
DR   STRING; 369723.Strop_0390; -.
DR   EnsemblBacteria; ABP52875; ABP52875; Strop_0390.
DR   KEGG; stp:Strop_0390; -.
DR   PATRIC; fig|369723.5.peg.404; -.
DR   eggNOG; COG0377; Bacteria.
DR   HOGENOM; CLU_055737_4_2_11; -.
DR   OMA; GWARKYS; -.
DR   Proteomes; UP000000235; 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.
PE   3: Inferred from homology;
KW   4Fe-4S; Cell membrane; Iron; Iron-sulfur; Membrane; Metal-binding; NAD;
KW   Quinone; Reference proteome; Translocase; Transport.
FT   CHAIN           1..188
FT                   /note="NADH-quinone oxidoreductase subunit B 1"
FT                   /id="PRO_0000376357"
FT   REGION          153..188
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         32
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000250"
FT   BINDING         33
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000250"
FT   BINDING         98
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000250"
FT   BINDING         128
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   188 AA;  20334 MW;  00F05BD66DF2F3A8 CRC64;
     MQVPAVLGEP IRFVLNWGRR YSLWVFNFGL ACCAIEFIAT SMSRHDFMRL GVIPFAHGPR
     QADLMVVSGT VTDKMAPAIK RLYDQMPEPK YVISFGACSN CGGPYWDSYS VTKGVDQLIP
     VDVYVPGCPP RPEALLHGIL RLQEKIAAEE AGVGGVSRPD ALASPADALP PRAADSLTAP
     PVRPPDPS