ID   NUOB_ACIC1              Reviewed;         184 AA.
AC   A0LRI2;
DT   26-MAY-2009, integrated into UniProtKB/Swiss-Prot.
DT   12-DEC-2006, sequence version 1.
DT   03-AUG-2022, entry version 94.
DE   RecName: Full=NADH-quinone oxidoreductase subunit B {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 {ECO:0000255|HAMAP-Rule:MF_01356};
DE   AltName: Full=NDH-1 subunit B {ECO:0000255|HAMAP-Rule:MF_01356};
GN   Name=nuoB {ECO:0000255|HAMAP-Rule:MF_01356}; OrderedLocusNames=Acel_0268;
OS   Acidothermus cellulolyticus (strain ATCC 43068 / DSM 8971 / 11B).
OC   Bacteria; Actinobacteria; Acidothermales; Acidothermaceae; Acidothermus.
OX   NCBI_TaxID=351607;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 43068 / DSM 8971 / 11B;
RX   PubMed=19270083; DOI=10.1101/gr.084848.108;
RA   Barabote R.D., Xie G., Leu D.H., Normand P., Necsulea A., Daubin V.,
RA   Medigue C., Adney W.S., Xu X.C., Lapidus A., Parales R.E., Detter C.,
RA   Pujic P., Bruce D., Lavire C., Challacombe J.F., Brettin T.S., Berry A.M.;
RT   "Complete genome of the cellulolytic thermophile Acidothermus
RT   cellulolyticus 11B provides insights into its ecophysiological and
RT   evolutionary adaptations.";
RL   Genome Res. 19:1033-1043(2009).
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 membrane {ECO:0000255|HAMAP-Rule:MF_01356};
CC       Peripheral membrane protein {ECO:0000255|HAMAP-Rule:MF_01356};
CC       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; CP000481; ABK52042.1; -; Genomic_DNA.
DR   RefSeq; WP_011719105.1; NC_008578.1.
DR   AlphaFoldDB; A0LRI2; -.
DR   SMR; A0LRI2; -.
DR   STRING; 351607.Acel_0268; -.
DR   EnsemblBacteria; ABK52042; ABK52042; Acel_0268.
DR   KEGG; ace:Acel_0268; -.
DR   eggNOG; COG0377; Bacteria.
DR   HOGENOM; CLU_055737_7_3_11; -.
DR   OMA; AGWVRKS; -.
DR   OrthoDB; 1904620at2; -.
DR   Proteomes; UP000008221; 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 membrane; Iron; Iron-sulfur; Membrane; Metal-binding; NAD;
KW   Quinone; Reference proteome; Translocase; Transport.
FT   CHAIN           1..184
FT                   /note="NADH-quinone oxidoreductase subunit B"
FT                   /id="PRO_0000376103"
FT   REGION          164..184
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         37
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT   BINDING         38
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT   BINDING         103
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT   BINDING         132
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
SQ   SEQUENCE   184 AA;  20271 MW;  6EB1AD92AFC4FC3B CRC64;
     MGIEEKIPGG FLLTTVEKAV GWVRKSSLWP ATFGLACCAI EMMATGAGRY DLARFGMEVF
     RASPRQADLM IVAGRVSQKM APVLRQIYDQ MPEPKWVLAM GVCASSGGMF NNYAIVQGVD
     HVVPVDMYLP GCPPRPEMLM HAILELHEKI KSTKLGVHAV REAHEREEAA KHALPTHSMK
     GLLR