ID   NU6C_HELAN              Reviewed;         176 AA.
AC   Q1KXQ6;
DT   20-JAN-2009, integrated into UniProtKB/Swiss-Prot.
DT   30-MAY-2006, sequence version 1.
DT   03-AUG-2022, entry version 47.
DE   RecName: Full=NAD(P)H-quinone oxidoreductase subunit 6, chloroplastic;
DE            EC=7.1.1.-;
DE   AltName: Full=NAD(P)H dehydrogenase subunit 6;
DE   AltName: Full=NADH-plastoquinone oxidoreductase subunit 6;
GN   Name=ndhG;
OS   Helianthus annuus (Common sunflower).
OG   Plastid; Chloroplast.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; campanulids; Asterales; Asteraceae; Asteroideae;
OC   Heliantheae alliance; Heliantheae; Helianthus.
OX   NCBI_TaxID=4232;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=cv. HA383;
RA   Timme R.E., Kuehl J.V., Boore J.L., Jansen R.K.;
RT   "A comparison of the first two published chloroplast genomes in Asteraceae:
RT   Lactuca and Helianthus.";
RL   Submitted (JAN-2006) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: NDH shuttles electrons from NAD(P)H:plastoquinone, via FMN
CC       and iron-sulfur (Fe-S) centers, to quinones in the photosynthetic chain
CC       and possibly in a chloroplast respiratory chain. The immediate electron
CC       acceptor for the enzyme in this species is believed to be
CC       plastoquinone. Couples the redox reaction to proton translocation, and
CC       thus conserves the redox energy in a proton gradient (By similarity).
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a plastoquinone + (n+1) H(+)(in) + NADH = a plastoquinol + n
CC         H(+)(out) + NAD(+); Xref=Rhea:RHEA:42608, Rhea:RHEA-COMP:9561,
CC         Rhea:RHEA-COMP:9562, ChEBI:CHEBI:15378, ChEBI:CHEBI:17757,
CC         ChEBI:CHEBI:57540, ChEBI:CHEBI:57945, ChEBI:CHEBI:62192;
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a plastoquinone + (n+1) H(+)(in) + NADPH = a plastoquinol + n
CC         H(+)(out) + NADP(+); Xref=Rhea:RHEA:42612, Rhea:RHEA-COMP:9561,
CC         Rhea:RHEA-COMP:9562, ChEBI:CHEBI:15378, ChEBI:CHEBI:17757,
CC         ChEBI:CHEBI:57783, ChEBI:CHEBI:58349, ChEBI:CHEBI:62192;
CC   -!- SUBUNIT: NDH is composed of at least 16 different subunits, 5 of which
CC       are encoded in the nucleus. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250}; Multi-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 6 family. {ECO:0000305}.
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DR   EMBL; DQ383815; ABD47198.1; -; Genomic_DNA.
DR   RefSeq; YP_588170.1; NC_007977.1.
DR   AlphaFoldDB; Q1KXQ6; -.
DR   SMR; Q1KXQ6; -.
DR   GeneID; 4055624; -.
DR   KEGG; han:4055624; -.
DR   OrthoDB; 1388741at2759; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; IEA:InterPro.
DR   GO; GO:0048038; F:quinone binding; IEA:UniProtKB-KW.
DR   Gene3D; 1.20.120.1200; -; 1.
DR   InterPro; IPR001457; NADH_UbQ/plastoQ_OxRdtase_su6.
DR   InterPro; IPR042106; Nuo/plastoQ_OxRdtase_6_NuoJ.
DR   Pfam; PF00499; Oxidored_q3; 1.
PE   3: Inferred from homology;
KW   Chloroplast; Membrane; NAD; NADP; Plastid; Plastoquinone; Quinone;
KW   Thylakoid; Translocase; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..176
FT                   /note="NAD(P)H-quinone oxidoreductase subunit 6,
FT                   chloroplastic"
FT                   /id="PRO_0000360257"
FT   TRANSMEM        10..30
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        32..52
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        61..81
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        92..112
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        152..172
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   176 AA;  19143 MW;  2EF248ACC00A9DC0 CRC64;
     MDLPGLIHDF LLVFLGLGLI LGGLGVVLLA NPIYSAFSLG LVFVCISLFY ILSNSHFVAA
     AQLLIYVGAI NVLIIFAVMF INGSEYSKDF HLWTVGDGVT SVVCTSLFVS LITTIPDTSW
     YGIIWTTKAN QIIEQDLISN SQQIGIHLST DFFIPFEFIS IILLVALIGA IAVARQ