ID   NUOK_ANOFW              Reviewed;         103 AA.
AC   B7GME4;
DT   15-DEC-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-FEB-2009, sequence version 1.
DT   25-MAY-2022, entry version 64.
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=Aflv_2693;
OS   Anoxybacillus flavithermus (strain DSM 21510 / WK1).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Anoxybacillus.
OX   NCBI_TaxID=491915;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 21510 / WK1;
RX   PubMed=19014707; DOI=10.1186/gb-2008-9-11-r161;
RA   Saw J.H., Mountain B.W., Feng L., Omelchenko M.V., Hou S., Saito J.A.,
RA   Stott M.B., Li D., Zhao G., Wu J., Galperin M.Y., Koonin E.V.,
RA   Makarova K.S., Wolf Y.I., Rigden D.J., Dunfield P.F., Wang L., Alam M.;
RT   "Encapsulated in silica: genome, proteome and physiology of the
RT   thermophilic bacterium Anoxybacillus flavithermus WK1.";
RL   Genome Biol. 9:R161.1-R161.16(2008).
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; CP000922; ACJ35046.1; -; Genomic_DNA.
DR   RefSeq; WP_006319901.1; NC_011567.1.
DR   AlphaFoldDB; B7GME4; -.
DR   SMR; B7GME4; -.
DR   STRING; 491915.Aflv_2693; -.
DR   EnsemblBacteria; ACJ35046; ACJ35046; Aflv_2693.
DR   GeneID; 58190925; -.
DR   KEGG; afl:Aflv_2693; -.
DR   eggNOG; COG0713; Bacteria.
DR   HOGENOM; CLU_144724_0_0_9; -.
DR   OMA; NFVAFSY; -.
DR   OrthoDB; 2081663at2; -.
DR   Proteomes; UP000000742; 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..103
FT                   /note="NADH-quinone oxidoreductase subunit K"
FT                   /id="PRO_0000389929"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01456"
FT   TRANSMEM        30..50
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01456"
FT   TRANSMEM        66..86
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01456"
SQ   SEQUENCE   103 AA;  11212 MW;  AAFA74F8A95C45B4 CRC64;
     MSVPLSAYLV FALMLFCIGL YGALTKRNTV IVLICIELML NAVNVNLVAF SKYGMNPGIT
     GQVFSLFTIT VAAAEAAVGL AILIALYRNR KTIHIDEVDS MKR