ID   NUOB_BEUC1              Reviewed;         184 AA.
AC   C5C0S6;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 1.
DT   03-AUG-2022, entry version 67.
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=Bcav_3228;
OS   Beutenbergia cavernae (strain ATCC BAA-8 / DSM 12333 / NBRC 16432).
OC   Bacteria; Actinobacteria; Micrococcales; Beutenbergiaceae; Beutenbergia.
OX   NCBI_TaxID=471853;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-8 / DSM 12333 / NBRC 16432;
RX   PubMed=21304633; DOI=10.4056/sigs.1162;
RA   Land M., Pukall R., Abt B., Goker M., Rohde M., Glavina Del Rio T.,
RA   Tice H., Copeland A., Cheng J.F., Lucas S., Chen F., Nolan M., Bruce D.,
RA   Goodwin L., Pitluck S., Ivanova N., Mavromatis K., Ovchinnikova G.,
RA   Pati A., Chen A., Palaniappan K., Hauser L., Chang Y.J., Jefferies C.C.,
RA   Saunders E., Brettin T., Detter J.C., Han C., Chain P., Bristow J.,
RA   Eisen J.A., Markowitz V., Hugenholtz P., Kyrpides N.C., Klenk H.P.,
RA   Lapidus A.;
RT   "Complete genome sequence of Beutenbergia cavernae type strain (HKI
RT   0122).";
RL   Stand. Genomic Sci. 1:21-28(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; CP001618; ACQ81472.1; -; Genomic_DNA.
DR   RefSeq; WP_015883710.1; NC_012669.1.
DR   AlphaFoldDB; C5C0S6; -.
DR   SMR; C5C0S6; -.
DR   STRING; 471853.Bcav_3228; -.
DR   PRIDE; C5C0S6; -.
DR   EnsemblBacteria; ACQ81472; ACQ81472; Bcav_3228.
DR   KEGG; bcv:Bcav_3228; -.
DR   eggNOG; COG0377; Bacteria.
DR   HOGENOM; CLU_055737_7_3_11; -.
DR   OMA; AGWVRKS; -.
DR   OrthoDB; 1904620at2; -.
DR   Proteomes; UP000007962; 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_1000214855"
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;  19946 MW;  380D577FB6E0764A CRC64;
     MGIEEKAPSG FMLAKVSDLV GLIRKSSLWP VTMGLACCAI EMMATGTPRF DISRFGMEVF
     RASPRQADLM IVSGRVSQKM APVVRQVYDQ MSEPKWVLSM GVCASSGGMF NNYAVVQGVD
     HILPVDIYLP GCPPRPEMLL NAILELHEQI RSEPLGANRA EAARAVEAAA LRATPTHEMT
     GLLA