NUOB2_CHLAD
ID NUOB2_CHLAD Reviewed; 264 AA.
AC B8GA16;
DT 26-MAY-2009, integrated into UniProtKB/Swiss-Prot.
DT 03-MAR-2009, sequence version 1.
DT 03-AUG-2022, entry version 70.
DE RecName: Full=NADH-quinone oxidoreductase subunit B 2 {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 2 {ECO:0000255|HAMAP-Rule:MF_01356};
DE AltName: Full=NDH-1 subunit B 2 {ECO:0000255|HAMAP-Rule:MF_01356};
GN Name=nuoB2 {ECO:0000255|HAMAP-Rule:MF_01356}; OrderedLocusNames=Cagg_1630;
OS Chloroflexus aggregans (strain MD-66 / DSM 9485).
OC Bacteria; Chloroflexi; Chloroflexia; Chloroflexales; Chloroflexineae;
OC Chloroflexaceae; Chloroflexus.
OX NCBI_TaxID=326427;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=MD-66 / DSM 9485;
RG US DOE Joint Genome Institute;
RA Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA Pitluck S., Foster B., Larimer F., Land M., Hauser L., Kyrpides N.,
RA Mikhailova N., Bryant D.A., Richardson P.;
RT "Complete sequence of Chloroflexus aggregans DSM 9485.";
RL Submitted (DEC-2008) 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
CC ubiquinone. 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; CP001337; ACL24531.1; -; Genomic_DNA.
DR RefSeq; WP_015940390.1; NC_011831.1.
DR AlphaFoldDB; B8GA16; -.
DR SMR; B8GA16; -.
DR STRING; 326427.Cagg_1630; -.
DR EnsemblBacteria; ACL24531; ACL24531; Cagg_1630.
DR KEGG; cag:Cagg_1630; -.
DR eggNOG; COG0377; Bacteria.
DR HOGENOM; CLU_055737_3_0_0; -.
DR OMA; IEMIATT; -.
DR OrthoDB; 1904620at2; -.
DR Proteomes; UP000002508; 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; Translocase; Transport; Ubiquinone.
FT CHAIN 1..264
FT /note="NADH-quinone oxidoreductase subunit B 2"
FT /id="PRO_0000376174"
FT BINDING 42
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT BINDING 43
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT BINDING 108
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
FT BINDING 138
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01356"
SQ SEQUENCE 264 AA; 29204 MW; 05983D6653702B0E CRC64;
MADIDPNQLE LERQGILLTT VNRFYNWGRR SSIWPMAFGL ACCAIEMMAF GLSRYDVARF
GAELFRASPR QADLMIVAGT VTKKMAPQVV RLYNQMAEPR YVISMGACAT SGGPFRDGYN
VLRGIDLLIP VDVYVPGCPP RPEALLHALM TLQEQIDRQK LGRVRWYGEG DKPQTTDFPV
PTFGAKGLEI DGKLIDPVGG LPLLSPYTSP SHGEHRSGQI EHPEVVRQFP IMDPEVELEH
ALKARGVSPE IAADDLKRGE VSNA
