ID   NUOH2_RHOP2             Reviewed;         341 AA.
AC   Q2IWX6;
DT   11-JUL-2006, integrated into UniProtKB/Swiss-Prot.
DT   07-MAR-2006, sequence version 1.
DT   25-MAY-2022, entry version 85.
DE   RecName: Full=NADH-quinone oxidoreductase subunit H 2 {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 2 {ECO:0000255|HAMAP-Rule:MF_01350};
DE   AltName: Full=NDH-1 subunit H 2 {ECO:0000255|HAMAP-Rule:MF_01350};
GN   Name=nuoH2 {ECO:0000255|HAMAP-Rule:MF_01350}; OrderedLocusNames=RPB_2581;
OS   Rhodopseudomonas palustris (strain HaA2).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Bradyrhizobiaceae; Rhodopseudomonas.
OX   NCBI_TaxID=316058;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=HaA2;
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., Chain P., Malfatti S., Shin M.,
RA   Vergez L., Schmutz J., Larimer F., Land M., Hauser L., Pelletier D.A.,
RA   Kyrpides N., Anderson I., Oda Y., Harwood C.S., Richardson P.;
RT   "Complete sequence of Rhodopseudomonas palustris HaA2.";
RL   Submitted (JAN-2006) 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. This subunit may bind ubiquinone.
CC       {ECO:0000255|HAMAP-Rule:MF_01350}.
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_01350};
CC   -!- SUBUNIT: NDH-1 is composed of 14 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 inner membrane {ECO:0000255|HAMAP-
CC       Rule:MF_01350}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_01350}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 1 family.
CC       {ECO:0000255|HAMAP-Rule:MF_01350}.
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DR   EMBL; CP000250; ABD07284.1; -; Genomic_DNA.
DR   RefSeq; WP_011441469.1; NC_007778.1.
DR   AlphaFoldDB; Q2IWX6; -.
DR   SMR; Q2IWX6; -.
DR   STRING; 316058.RPB_2581; -.
DR   EnsemblBacteria; ABD07284; ABD07284; RPB_2581.
DR   KEGG; rpb:RPB_2581; -.
DR   eggNOG; COG1005; Bacteria.
DR   HOGENOM; CLU_015134_0_1_5; -.
DR   OMA; MYVGMGI; -.
DR   OrthoDB; 1559067at2; -.
DR   Proteomes; UP000008809; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016655; F:oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor; IEA:UniProtKB-UniRule.
DR   GO; GO:0048038; F:quinone binding; IEA:UniProtKB-KW.
DR   HAMAP; MF_01350; NDH1_NuoH; 1.
DR   InterPro; IPR001694; NADH_UbQ_OxRdtase_su1/FPO.
DR   InterPro; IPR018086; NADH_UbQ_OxRdtase_su1_CS.
DR   PANTHER; PTHR11432; PTHR11432; 1.
DR   Pfam; PF00146; NADHdh; 1.
DR   PROSITE; PS00668; COMPLEX1_ND1_2; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Membrane; NAD; Quinone; Translocase;
KW   Transmembrane; Transmembrane helix; Ubiquinone.
FT   CHAIN           1..341
FT                   /note="NADH-quinone oxidoreductase subunit H 2"
FT                   /id="PRO_0000244947"
FT   TRANSMEM        13..33
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        82..102
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        115..135
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        161..181
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        190..210
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        242..262
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        277..297
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
FT   TRANSMEM        317..337
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01350"
SQ   SEQUENCE   341 AA;  37513 MW;  4A610AD6E7D14A2D CRC64;
     MADFFMTNLW PLIVVIGQSV LLIVVLLISI AYILLADRKI WAAVQIRRGP NVVGPWGLLQ
     SFADLLKMIL KEPMIPSGAN KGVFLLAPLV TCVLALSAWA VIPVSAGWVI ADINVGVLYI
     LAVSSLSVYG IIMAGWSSNS KYPFLAALRS AAQMVSYEVS IGFVIICVLL CVGSLNLTAI
     VQAQNSQWGV LGWYWLPLFP MFVVFYVSAL AETNRPPFDL VEAESELVAG FMVEYSSTPY
     MLFVLGEYVA IVTMCAMGTI LFLGGWLPPV PYAPFTWVPG IVWFALKVLF MFFMFAMAKA
     IVPRYRYDQL MRLGWKVFLP LSLAMVVIVA AVLQFAGLAP K