ID   NQRA_SACD2              Reviewed;         447 AA.
AC   Q21JS2;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   18-APR-2006, sequence version 1.
DT   25-MAY-2022, entry version 82.
DE   RecName: Full=Na(+)-translocating NADH-quinone reductase subunit A {ECO:0000255|HAMAP-Rule:MF_00425};
DE            Short=Na(+)-NQR subunit A {ECO:0000255|HAMAP-Rule:MF_00425};
DE            Short=Na(+)-translocating NQR subunit A {ECO:0000255|HAMAP-Rule:MF_00425};
DE            EC=7.2.1.1 {ECO:0000255|HAMAP-Rule:MF_00425};
DE   AltName: Full=NQR complex subunit A {ECO:0000255|HAMAP-Rule:MF_00425};
DE   AltName: Full=NQR-1 subunit A {ECO:0000255|HAMAP-Rule:MF_00425};
GN   Name=nqrA {ECO:0000255|HAMAP-Rule:MF_00425}; OrderedLocusNames=Sde_1797;
OS   Saccharophagus degradans (strain 2-40 / ATCC 43961 / DSM 17024).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Cellvibrionales;
OC   Cellvibrionaceae; Saccharophagus.
OX   NCBI_TaxID=203122;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=2-40 / ATCC 43961 / DSM 17024;
RX   PubMed=18516288; DOI=10.1371/journal.pgen.1000087;
RA   Weiner R.M., Taylor L.E. II, Henrissat B., Hauser L., Land M.,
RA   Coutinho P.M., Rancurel C., Saunders E.H., Longmire A.G., Zhang H.,
RA   Bayer E.A., Gilbert H.J., Larimer F., Zhulin I.B., Ekborg N.A., Lamed R.,
RA   Richardson P.M., Borovok I., Hutcheson S.;
RT   "Complete genome sequence of the complex carbohydrate-degrading marine
RT   bacterium, Saccharophagus degradans strain 2-40 T.";
RL   PLoS Genet. 4:E1000087-E1000087(2008).
CC   -!- FUNCTION: NQR complex catalyzes the reduction of ubiquinone-1 to
CC       ubiquinol by two successive reactions, coupled with the transport of
CC       Na(+) ions from the cytoplasm to the periplasm. NqrA to NqrE are
CC       probably involved in the second step, the conversion of ubisemiquinone
CC       to ubiquinol. {ECO:0000255|HAMAP-Rule:MF_00425}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a ubiquinone + H(+) + n Na(+)(in) + NADH = a ubiquinol + n
CC         Na(+)(out) + NAD(+); Xref=Rhea:RHEA:47748, Rhea:RHEA-COMP:9565,
CC         Rhea:RHEA-COMP:9566, ChEBI:CHEBI:15378, ChEBI:CHEBI:16389,
CC         ChEBI:CHEBI:17976, ChEBI:CHEBI:29101, ChEBI:CHEBI:57540,
CC         ChEBI:CHEBI:57945; EC=7.2.1.1; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00425};
CC   -!- SUBUNIT: Composed of six subunits; NqrA, NqrB, NqrC, NqrD, NqrE and
CC       NqrF. {ECO:0000255|HAMAP-Rule:MF_00425}.
CC   -!- SIMILARITY: Belongs to the NqrA family. {ECO:0000255|HAMAP-
CC       Rule:MF_00425}.
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DR   EMBL; CP000282; ABD81057.1; -; Genomic_DNA.
DR   RefSeq; WP_011468277.1; NC_007912.1.
DR   AlphaFoldDB; Q21JS2; -.
DR   SMR; Q21JS2; -.
DR   STRING; 203122.Sde_1797; -.
DR   EnsemblBacteria; ABD81057; ABD81057; Sde_1797.
DR   KEGG; sde:Sde_1797; -.
DR   eggNOG; COG1726; Bacteria.
DR   HOGENOM; CLU_046656_0_0_6; -.
DR   OMA; IKQRPYD; -.
DR   OrthoDB; 688908at2; -.
DR   Proteomes; UP000001947; Chromosome.
DR   GO; GO:0016655; F:oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor; IEA:UniProtKB-UniRule.
DR   GO; GO:0006814; P:sodium ion transport; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_00425; NqrA; 1.
DR   InterPro; IPR008703; NqrA.
DR   InterPro; IPR022615; NqrA_C_domain.
DR   PANTHER; PTHR37839; PTHR37839; 1.
DR   Pfam; PF05896; NQRA; 1.
DR   Pfam; PF11973; NQRA_SLBB; 1.
DR   TIGRFAMs; TIGR01936; nqrA; 1.
PE   3: Inferred from homology;
KW   Ion transport; NAD; Reference proteome; Sodium; Sodium transport;
KW   Translocase; Transport; Ubiquinone.
FT   CHAIN           1..447
FT                   /note="Na(+)-translocating NADH-quinone reductase subunit
FT                   A"
FT                   /id="PRO_1000060126"
SQ   SEQUENCE   447 AA;  48052 MW;  0DAA139E218A8B19 CRC64;
     MIKIRRGLDL PITGSPRQSI EDGPAIRSVA LIGFDYHGMK PTMNVQVGDK VKLGQVLFTD
     KKTVGVKYTS PAAGTVSAIN RGERRVLQSV VIDIEGDEAE SFKTFSEAEI ASADRQALVD
     NLVDSGLWTA LRTRPYSKVP QLDSVPNSIF VTAMDTNPLA ADPQLVIGEK SAAFALGLAV
     LAKLTEGKVF VCHADGASVP TSAAANVEAK AFSGVHPAGN AGTHIHFLDP VSANKTVWTI
     GYQDVIAYGE LFTSGKLPVD RVVSLAGPQV TDPRVVRTRL GASLQELTAG QLKDGENRII
     SGSVFSGRKT SSPTAYLGRF HNQVSVLLEG RDRPFLHYLV AGANRFSVMP IYLSKLFGGK
     KFDFTTSTLG SERAMVPVGA YEKVMPLDIL PTQLLRSIIV GDTEAAQQLG CLELDEEDLA
     LCSFVCPGKY EYGPILRDNL TRIEKEG