ID   NUOH_BUCAI              Reviewed;         322 AA.
AC   P57258;
DT   01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2000, sequence version 1.
DT   02-SEP-2026, entry version 127.
DE   RecName: Full=NADH-quinone oxidoreductase subunit H {ECO:0000255|HAMAP-Rule:MF_01350};
DE            EC=7.1.1.- {ECO:0000255|HAMAP-Rule:MF_01350};
DE   AltName: Full=NADH dehydrogenase I subunit H {ECO:0000255|HAMAP-Rule:MF_01350};
DE   AltName: Full=NDH-1 subunit H {ECO:0000255|HAMAP-Rule:MF_01350};
GN   Name=nuoH {ECO:0000255|HAMAP-Rule:MF_01350}; OrderedLocusNames=BU160;
OS   Buchnera aphidicola subsp. Acyrthosiphon pisum (strain APS) (Acyrthosiphon
OS   pisum symbiotic bacterium).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Enterobacterales; Erwiniaceae; Buchnera.
OX   NCBI_TaxID=107806;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=APS;
RX   PubMed=10993077; DOI=10.1038/35024074;
RA   Shigenobu S., Watanabe H., Hattori M., Sakaki Y., Ishikawa H.;
RT   "Genome sequence of the endocellular bacterial symbiont of aphids Buchnera
RT   sp. APS.";
RL   Nature 407:81-86(2000).
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. This subunit may bind ubiquinone.
CC       {ECO:0000255|HAMAP-Rule:MF_01350}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a quinone + NADH + 5 H(+)(in) = a quinol + NAD(+) + 4
CC         H(+)(out); Xref=Rhea:RHEA:57888, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:24646, ChEBI:CHEBI:57540, ChEBI:CHEBI:57945,
CC         ChEBI:CHEBI:132124; Evidence={ECO:0000255|HAMAP-Rule:MF_01350};
CC   -!- SUBUNIT: NDH-1 is composed of 13 different subunits. Subunits NuoA, H,
CC       J, K, L, M, N constitute the membrane sector of the complex.
CC       {ECO:0000255|HAMAP-Rule:MF_01350}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane; Multi-pass membrane protein.
CC   -!- SIMILARITY: Belongs to the complex I subunit 1 family.
CC       {ECO:0000255|HAMAP-Rule:MF_01350}.
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DR   EMBL; BA000003; BAB12878.1; -; Genomic_DNA.
DR   RefSeq; WP_010895978.1; NC_002528.1.
DR   AlphaFoldDB; P57258; -.
DR   SMR; P57258; -.
DR   STRING; 563178.BUAP5A_158; -.
DR   EnsemblBacteria; BAB12878; BAB12878; BAB12878.
DR   KEGG; buc:BU160; -.
DR   PATRIC; fig|107806.10.peg.170; -.
DR   eggNOG; COG1005; Bacteria.
DR   HOGENOM; CLU_015134_0_1_6; -.
DR   Proteomes; UP000001806; Chromosome.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0003954; F:NADH dehydrogenase activity; IEA:TreeGrafter.
DR   GO; GO:0016655; F:oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor; IEA:UniProtKB-UniRule.
DR   GO; GO:0009060; P:aerobic respiration; IEA:TreeGrafter.
DR   HAMAP; MF_01350; NDH1_NuoH; 1.
DR   InterPro; IPR001694; NADH_UbQ_OxRdtase_su1/FPO.
DR   InterPro; IPR018086; NADH_UbQ_OxRdtase_su1_CS.
DR   NCBIfam; NF004740; PRK06076.1-1; 1.
DR   NCBIfam; NF004741; PRK06076.1-2; 1.
DR   PANTHER; PTHR11432; NADH DEHYDROGENASE SUBUNIT 1; 1.
DR   PANTHER; PTHR11432:SF3; NADH-UBIQUINONE OXIDOREDUCTASE CHAIN 1; 1.
DR   Pfam; PF00146; NADHdh; 1.
DR   PROSITE; PS00667; COMPLEX1_ND1_1; 1.
DR   PROSITE; PS00668; COMPLEX1_ND1_2; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Membrane; NAD; Quinone; Reference proteome; Translocase;
KW   Transmembrane; Transmembrane helix; Ubiquinone.
FT   CHAIN           1..322
FT                   /note="NADH-quinone oxidoreductase subunit H"
FT                   /id="PRO_0000117526"
FT   TRANSMEM        15..35
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        50..69
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        81..101
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        114..134
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        149..169
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        186..206
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        237..257
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        265..285
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        302..322
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
SQ   SEQUENCE   322 AA;  36972 MW;  F251144E9A66AB52 CRC64;
     MIWLEENMIK ITFCFFKVIF ILLLIVFSSA MLSIVERRLL AVFQNRYGPN RVGWMGSLQL
     CADMIKILFK EDWIPPFSRK FIFVLSPVIA FTSLLCVIPI IPFTSHFVII DLNIGILFFL
     MMASLSVYAI LFAGWSSNNK YALLGAMRAC VQTLSYEVFL GLSLMGVVAQ SGSFKISDIV
     NSQKYIWNVF PQFFGFLTFL IAGLAVCHRH PFDQPESEQE LADGYHIEYS GMKFGLFFIG
     EYISIITVSS LIVTLFFGGW LGPWIPSCIW FILKIIFFIF LFILIRAALP RPRYDQVLLF
     GWKFCLPLTL FNLFLTAFLI LV
//