ID   NUOK_RUBXD              Reviewed;         112 AA.
AC   Q1AVI9;
DT   15-DEC-2009, integrated into UniProtKB/Swiss-Prot.
DT   11-JUL-2006, sequence version 1.
DT   25-MAY-2022, entry version 83.
DE   RecName: Full=NADH-quinone oxidoreductase subunit K {ECO:0000255|HAMAP-Rule:MF_01456};
DE            EC=7.1.1.- {ECO:0000255|HAMAP-Rule:MF_01456};
DE   AltName: Full=NADH dehydrogenase I subunit K {ECO:0000255|HAMAP-Rule:MF_01456};
DE   AltName: Full=NDH-1 subunit K {ECO:0000255|HAMAP-Rule:MF_01456};
GN   Name=nuoK {ECO:0000255|HAMAP-Rule:MF_01456}; OrderedLocusNames=Rxyl_1628;
OS   Rubrobacter xylanophilus (strain DSM 9941 / NBRC 16129 / PRD-1).
OC   Bacteria; Actinobacteria; Rubrobacteria; Rubrobacterales; Rubrobacteraceae;
OC   Rubrobacter.
OX   NCBI_TaxID=266117;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 9941 / NBRC 16129 / PRD-1;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Munk A.C., Brettin T., Bruce D., Han C., Tapia R., Gilna P., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Lykidis A., da Costa M.S.,
RA   Rainey F.A., Empadinhas N., Jolivet E., Battista J.R., Richardson P.;
RT   "Complete sequence of Rubrobacter xylanophilus DSM 9941.";
RL   Submitted (JUN-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 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_01456}.
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_01456};
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_01456}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_01456};
CC       Multi-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_01456}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 4L family.
CC       {ECO:0000255|HAMAP-Rule:MF_01456}.
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DR   EMBL; CP000386; ABG04589.1; -; Genomic_DNA.
DR   RefSeq; WP_011564606.1; NC_008148.1.
DR   AlphaFoldDB; Q1AVI9; -.
DR   SMR; Q1AVI9; -.
DR   STRING; 266117.Rxyl_1628; -.
DR   EnsemblBacteria; ABG04589; ABG04589; Rxyl_1628.
DR   KEGG; rxy:Rxyl_1628; -.
DR   eggNOG; COG0713; Bacteria.
DR   HOGENOM; CLU_144724_0_0_11; -.
DR   OMA; NFVAFSY; -.
DR   OrthoDB; 2081663at2; -.
DR   PhylomeDB; Q1AVI9; -.
DR   Proteomes; UP000006637; 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:0050136; F:NADH dehydrogenase (quinone) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0048038; F:quinone binding; IEA:UniProtKB-KW.
DR   GO; GO:0042773; P:ATP synthesis coupled electron transport; IEA:InterPro.
DR   HAMAP; MF_01456; NDH1_NuoK; 1.
DR   InterPro; IPR001133; NADH_UbQ_OxRdtase_chain4L/K.
DR   InterPro; IPR039428; NUOK/Mnh_C1-like.
DR   PANTHER; PTHR11434; PTHR11434; 1.
DR   Pfam; PF00420; Oxidored_q2; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Membrane; NAD; Quinone; Reference proteome; Translocase;
KW   Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..112
FT                   /note="NADH-quinone oxidoreductase subunit K"
FT                   /id="PRO_0000390213"
FT   TRANSMEM        14..34
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01456"
FT   TRANSMEM        39..59
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01456"
FT   TRANSMEM        76..96
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01456"
SQ   SEQUENCE   112 AA;  11788 MW;  DF74D5440B489800 CRC64;
     MQQLVEQLNA QIPLEGYLTV AAIMFAIGAW GALIRRNAVV VFMCVELMIN AVNLTLVAFA
     DFLPGAGGAG AGYTVLIIAI AAAEVAVGLA IVLAIFRTRR TVNIDEVDSL RG