NUOB_CHLL3
ID NUOB_CHLL3 Reviewed; 189 AA.
AC Q3B4W2;
DT 26-MAY-2009, integrated into UniProtKB/Swiss-Prot.
DT 22-NOV-2005, sequence version 1.
DT 03-AUG-2022, entry version 97.
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=Plut_0744;
OS Chlorobium luteolum (strain DSM 273 / BCRC 81028 / 2530) (Pelodictyon
OS luteolum).
OC Bacteria; Chlorobi; Chlorobia; Chlorobiales; Chlorobiaceae;
OC Chlorobium/Pelodictyon group; Pelodictyon.
OX NCBI_TaxID=319225;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 273 / BCRC 81028 / 2530;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA Hammon N., Israni S., Pitluck S., Bryant D., Schmutz J., Larimer F.,
RA Land M., Kyrpides N., Ivanova N., Richardson P.;
RT "Complete sequence of Pelodictyon luteolum DSM 273.";
RL Submitted (AUG-2005) to the EMBL/GenBank/DDBJ databases.
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; CP000096; ABB23619.1; -; Genomic_DNA.
DR RefSeq; WP_011357493.1; NC_007512.1.
DR AlphaFoldDB; Q3B4W2; -.
DR SMR; Q3B4W2; -.
DR STRING; 319225.Plut_0744; -.
DR EnsemblBacteria; ABB23619; ABB23619; Plut_0744.
DR KEGG; plt:Plut_0744; -.
DR eggNOG; COG0377; Bacteria.
DR HOGENOM; CLU_055737_7_3_10; -.
DR OMA; GPYWEHG; -.
DR OrthoDB; 1904620at2; -.
DR Proteomes; UP000002709; 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; Translocase; Transport.
FT CHAIN 1..189
FT /note="NADH-quinone oxidoreductase subunit B"
FT /id="PRO_0000376299"
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 189 AA; 20896 MW; E336674ED8632EC4 CRC64;
MGLLDAGFSR DNVLVAPVDA VLNWARLSSL WPMGFGLACC AIEMMATNAS NYDLERFGIF
PRSSPRQSDL MIVAGTVSMK MAERVVRLYE QMPEPRYVLS MGSCSNCGGP YWEHGYHVLK
GVDRVIPVDV YVPGCPPRPE ALIGGLMKVQ ELIRMEQIGM SRQEALKKLA ETGVEPRPFI
ERERSSAGA
