ID F7XXA8_MOREP Unreviewed; 224 AA.
AC F7XXA8;
DT 21-SEP-2011, integrated into UniProtKB/TrEMBL.
DT 21-SEP-2011, sequence version 1.
DT 27-MAR-2024, entry version 54.
DE RecName: Full=NADH-quinone oxidoreductase subunit B {ECO:0000256|HAMAP-Rule:MF_01356};
DE EC=7.1.1.- {ECO:0000256|HAMAP-Rule:MF_01356};
DE AltName: Full=NADH dehydrogenase I subunit B {ECO:0000256|HAMAP-Rule:MF_01356};
DE AltName: Full=NDH-1 subunit B {ECO:0000256|HAMAP-Rule:MF_01356};
GN Name=nuoB {ECO:0000256|HAMAP-Rule:MF_01356,
GN ECO:0000313|EMBL:AEI74734.1};
GN OrderedLocusNames=MEPCIT_073 {ECO:0000313|EMBL:AEI74734.1};
OS Moranella endobia (strain PCIT).
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; Moranella.
OX NCBI_TaxID=903503 {ECO:0000313|EMBL:AEI74734.1, ECO:0000313|Proteomes:UP000000504};
RN [1]
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=PCIT;
RA McCutcheon J.P., von Dohlen C.D.;
RT "An interdependent metabolic patchwork in the nested three-way symbiosis of
RT mealybugs.";
RL Submitted (SEP-2010) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:AEI74734.1, ECO:0000313|Proteomes:UP000000504}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCIT {ECO:0000313|EMBL:AEI74734.1,
RC ECO:0000313|Proteomes:UP000000504};
RX PubMed=21835622; DOI=10.1016/j.cub.2011.06.051;
RA McCutcheon J.P., von Dohlen C.D.;
RT "An interdependent metabolic patchwork in the nested symbiosis of
RT mealybugs.";
RL Curr. Biol. 21:1366-1372(2011).
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:0000256|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:0000256|HAMAP-Rule:MF_01356};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01356};
CC Note=Binds 1 [4Fe-4S] cluster. {ECO:0000256|HAMAP-Rule:MF_01356};
CC -!- SUBUNIT: NDH-1 is composed of 13 different subunits. Subunits NuoB, CD,
CC E, F, and G constitute the peripheral sector of the complex.
CC {ECO:0000256|HAMAP-Rule:MF_01356}.
CC -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000256|HAMAP-
CC Rule:MF_01356}; Peripheral membrane protein {ECO:0000256|HAMAP-
CC Rule:MF_01356}; Cytoplasmic side {ECO:0000256|HAMAP-Rule:MF_01356}.
CC -!- SIMILARITY: Belongs to the complex I 20 kDa subunit family.
CC {ECO:0000256|ARBA:ARBA00009173, ECO:0000256|HAMAP-Rule:MF_01356,
CC ECO:0000256|RuleBase:RU004464}.
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DR EMBL; CP002243; AEI74734.1; -; Genomic_DNA.
DR RefSeq; WP_013975485.1; NC_015735.1.
DR AlphaFoldDB; F7XXA8; -.
DR STRING; 903503.MEPCIT_073; -.
DR KEGG; men:MEPCIT_073; -.
DR eggNOG; COG0377; Bacteria.
DR HOGENOM; CLU_055737_7_3_6; -.
DR OrthoDB; 9786737at2; -.
DR Proteomes; UP000000504; 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 Gene3D; 3.40.50.12280; -; 1.
DR HAMAP; MF_01356; NDH1_NuoB; 1.
DR InterPro; IPR006137; NADH_UbQ_OxRdtase-like_20kDa.
DR InterPro; IPR006138; NADH_UQ_OxRdtase_20Kd_su.
DR NCBIfam; TIGR01957; nuoB_fam; 1.
DR PANTHER; PTHR11995; NADH DEHYDROGENASE; 1.
DR PANTHER; PTHR11995:SF36; NADH-QUINONE OXIDOREDUCTASE SUBUNIT B; 1.
DR Pfam; PF01058; Oxidored_q6; 1.
DR SUPFAM; SSF56770; HydA/Nqo6-like; 1.
DR PROSITE; PS01150; COMPLEX1_20K; 1.
PE 3: Inferred from homology;
KW 4Fe-4S {ECO:0000256|ARBA:ARBA00022485, ECO:0000256|HAMAP-Rule:MF_01356};
KW Cell inner membrane {ECO:0000256|HAMAP-Rule:MF_01356};
KW Cell membrane {ECO:0000256|ARBA:ARBA00022475, ECO:0000256|HAMAP-
KW Rule:MF_01356};
KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|HAMAP-Rule:MF_01356};
KW Iron-sulfur {ECO:0000256|ARBA:ARBA00023014, ECO:0000256|HAMAP-
KW Rule:MF_01356}; Membrane {ECO:0000256|HAMAP-Rule:MF_01356};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_01356};
KW NAD {ECO:0000256|ARBA:ARBA00023027, ECO:0000256|HAMAP-Rule:MF_01356};
KW Quinone {ECO:0000256|ARBA:ARBA00022719, ECO:0000256|HAMAP-Rule:MF_01356};
KW Reference proteome {ECO:0000313|Proteomes:UP000000504};
KW Translocase {ECO:0000256|HAMAP-Rule:MF_01356};
KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|HAMAP-Rule:MF_01356};
KW Ubiquinone {ECO:0000256|ARBA:ARBA00023075, ECO:0000256|HAMAP-
KW Rule:MF_01356}.
FT DOMAIN 67..174
FT /note="NADH:ubiquinone oxidoreductase-like 20kDa subunit"
FT /evidence="ECO:0000259|Pfam:PF01058"
FT BINDING 67
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01356"
FT BINDING 68
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01356"
FT BINDING 133
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01356"
FT BINDING 162
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01356"
SQ SEQUENCE 224 AA; 25483 MW; E3348C67D1D552CE CRC64;
MDYTLTRAEP EGNHERYPLQ KEKIVADPLE QHVQSSVYLS KLKSVLHNAV NWGRSNSLWP
YNFGLSCCYV EMTTAFTAVH DVARFGAEVI RASPRQADFM VVAGTPFTKM VPIIQRLYDQ
MLEPKWVISM GACANSGGMY DIYSVVQGVD KFLPVDVYIP GCPPRPEAYI QALLLLKDSI
SKERRPLSWV VGDQGIYRAN IDSERQRKYG ERINVTHLRN PEEI
//
