ID   NUOD2_SYMTH             Reviewed;         384 AA.
AC   Q67KN9;
DT   16-DEC-2008, integrated into UniProtKB/Swiss-Prot.
DT   11-OCT-2004, sequence version 1.
DT   25-MAY-2022, entry version 110.
DE   RecName: Full=NADH-quinone oxidoreductase subunit D 2 {ECO:0000255|HAMAP-Rule:MF_01358};
DE            EC=7.1.1.- {ECO:0000255|HAMAP-Rule:MF_01358};
DE   AltName: Full=NADH dehydrogenase I subunit D 2 {ECO:0000255|HAMAP-Rule:MF_01358};
DE   AltName: Full=NDH-1 subunit D 2 {ECO:0000255|HAMAP-Rule:MF_01358};
GN   Name=nuoD2 {ECO:0000255|HAMAP-Rule:MF_01358}; OrderedLocusNames=STH2774;
OS   Symbiobacterium thermophilum (strain T / IAM 14863).
OC   Bacteria; Firmicutes; Clostridia; Eubacteriales; Symbiobacteriaceae;
OC   Symbiobacterium.
OX   NCBI_TaxID=292459;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=T / IAM 14863;
RX   PubMed=15383646; DOI=10.1093/nar/gkh830;
RA   Ueda K., Yamashita A., Ishikawa J., Shimada M., Watsuji T., Morimura K.,
RA   Ikeda H., Hattori M., Beppu T.;
RT   "Genome sequence of Symbiobacterium thermophilum, an uncultivable bacterium
RT   that depends on microbial commensalism.";
RL   Nucleic Acids Res. 32:4937-4944(2004).
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_01358}.
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_01358};
CC   -!- SUBUNIT: NDH-1 is composed of 14 different subunits. Subunits NuoB, C,
CC       D, E, F, and G constitute the peripheral sector of the complex.
CC       {ECO:0000255|HAMAP-Rule:MF_01358}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_01358};
CC       Peripheral membrane protein {ECO:0000255|HAMAP-Rule:MF_01358};
CC       Cytoplasmic side {ECO:0000255|HAMAP-Rule:MF_01358}.
CC   -!- SIMILARITY: Belongs to the complex I 49 kDa subunit family.
CC       {ECO:0000255|HAMAP-Rule:MF_01358}.
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DR   EMBL; AP006840; BAD41759.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q67KN9; -.
DR   SMR; Q67KN9; -.
DR   STRING; 292459.STH2774; -.
DR   EnsemblBacteria; BAD41759; BAD41759; STH2774.
DR   KEGG; sth:STH2774; -.
DR   eggNOG; COG0649; Bacteria.
DR   HOGENOM; CLU_015134_1_2_9; -.
DR   OMA; IMGTSME; -.
DR   OrthoDB; 473681at2; -.
DR   Proteomes; UP000000417; Chromosome.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0051287; F:NAD binding; IEA:InterPro.
DR   GO; GO:0050136; F:NADH dehydrogenase (quinone) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0048038; F:quinone binding; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.645.10; -; 1.
DR   HAMAP; MF_01358; NDH1_NuoD; 1.
DR   InterPro; IPR001135; NADH_Q_OxRdtase_suD.
DR   InterPro; IPR022885; NDH1_su_D/H.
DR   InterPro; IPR029014; NiFe-Hase_large.
DR   PANTHER; PTHR11993; PTHR11993; 1.
DR   Pfam; PF00346; Complex1_49kDa; 2.
DR   SUPFAM; SSF56762; SSF56762; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Membrane; NAD; Quinone; Reference proteome; Translocase;
KW   Transport.
FT   CHAIN           1..384
FT                   /note="NADH-quinone oxidoreductase subunit D 2"
FT                   /id="PRO_0000357944"
SQ   SEQUENCE   384 AA;  43902 MW;  9309D348E8B93F69 CRC64;
     MNVERTQELL VNMGPQHPST HGVLRLMIKL DGEQVTWCEP DIGYLHRCFE KLAEQKTYPQ
     VIPFTDRTDY LAAMLNELCY VEAVEKLFGD AIQVPERAQY IRVMLAELQR ITSHLLALGS
     MAMDLGATTP FLYCWRDREK LYSLFERITG GRMLYNYLRI GGVRNDLPEG ILGTPQDGED
     KADKTIWGFI NYFDSYVYPE WKALVTGNRI FQYRTKNIGV LTAEQAIAYS CSGAVLRGSG
     VKWDLRKNLP YAIYDRFEFD IPVGQNGDSF DRWWVRQEEM YQSSRIVKQC LEWLAENPGP
     VMAPKMPRVL KPPKGEVYHR IEGARGEVAC YVVSDGSTNP YKVKWRSPAF THLQLMPLLC
     PGHKIADIIA ILGSIDVVLG EVDR