ID   NUOA_EHRS3              Reviewed;         130 AA.
AC   Q2GDY1;
DT   10-FEB-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-FEB-2009, sequence version 2.
DT   04-NOV-2026, entry version 100.
DE   RecName: Full=NADH-quinone oxidoreductase subunit A {ECO:0000255|HAMAP-Rule:MF_01394};
DE            EC=7.1.1.- {ECO:0000255|HAMAP-Rule:MF_01394};
DE   AltName: Full=NADH dehydrogenase I subunit A {ECO:0000255|HAMAP-Rule:MF_01394};
DE   AltName: Full=NDH-1 subunit A {ECO:0000255|HAMAP-Rule:MF_01394};
DE   AltName: Full=NUO1 {ECO:0000255|HAMAP-Rule:MF_01394};
GN   Name=nuoA {ECO:0000255|HAMAP-Rule:MF_01394};
GN   OrderedLocusNames=NSE_0429;
OS   Ehrlichia sennetsu (strain ATCC VR-367 / Miyayama) (Neorickettsia
OS   sennetsu).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Alphaproteobacteria;
OC   Rickettsiales; Anaplasmataceae; Ehrlichia.
OX   NCBI_TaxID=222891;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC VR-367 / Miyayama;
RX   PubMed=16482227; DOI=10.1371/journal.pgen.0020021;
RA   Dunning Hotopp J.C., Lin M., Madupu R., Crabtree J., Angiuoli S.V.,
RA   Eisen J.A., Seshadri R., Ren Q., Wu M., Utterback T.R., Smith S., Lewis M.,
RA   Khouri H., Zhang C., Niu H., Lin Q., Ohashi N., Zhi N., Nelson W.C.,
RA   Brinkac L.M., Dodson R.J., Rosovitz M.J., Sundaram J.P., Daugherty S.C.,
RA   Davidsen T., Durkin A.S., Gwinn M.L., Haft D.H., Selengut J.D.,
RA   Sullivan S.A., Zafar N., Zhou L., Benahmed F., Forberger H., Halpin R.,
RA   Mulligan S., Robinson J., White O., Rikihisa Y., Tettelin H.;
RT   "Comparative genomics of emerging human ehrlichiosis agents.";
RL   PLoS Genet. 2:208-222(2006).
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
CC       ubiquinone. 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_01394}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a quinone + NADH + 5 H(+)(in) = a quinol + NAD(+) + 4
CC         H(+)(out); Xref=Rhea:RHEA:57888, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:24646, ChEBI:CHEBI:57540, ChEBI:CHEBI:57945,
CC         ChEBI:CHEBI:132124; Evidence={ECO:0000255|HAMAP-Rule:MF_01394};
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_01394}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000255|HAMAP-
CC       Rule:MF_01394}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_01394}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 3 family.
CC       {ECO:0000255|HAMAP-Rule:MF_01394}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=ABD45956.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; CP000237; ABD45956.1; ALT_INIT; Genomic_DNA.
DR   RefSeq; WP_041917496.1; NC_007798.1.
DR   AlphaFoldDB; Q2GDY1; -.
DR   SMR; Q2GDY1; -.
DR   STRING; 222891.NSE_0429; -.
DR   KEGG; nse:NSE_0429; -.
DR   eggNOG; COG0838; Bacteria.
DR   HOGENOM; CLU_119549_0_2_5; -.
DR   OMA; AAFFFPW; -.
DR   Proteomes; UP000001942; Chromosome.
DR   GO; GO:0030964; C:NADH dehydrogenase complex; IEA:TreeGrafter.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0050136; F:NADH dehydrogenase (quinone) (non-electrogenic) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; IEA:InterPro.
DR   FunFam; 1.20.58.1610:FF:000004; NADH-quinone oxidoreductase subunit A; 1.
DR   Gene3D; 1.20.58.1610; NADH:ubiquinone/plastoquinone oxidoreductase, chain 3; 1.
DR   HAMAP; MF_01394; NDH1_NuoA; 1.
DR   InterPro; IPR023043; NAD(P)H_OxRDtase_bac/plastid.
DR   InterPro; IPR000440; NADH_UbQ/plastoQ_OxRdtase_su3.
DR   InterPro; IPR038430; NDAH_ubi_oxred_su3_sf.
DR   PANTHER; PTHR11058; NADH-UBIQUINONE OXIDOREDUCTASE CHAIN 3; 1.
DR   PANTHER; PTHR11058:SF9; NADH-UBIQUINONE OXIDOREDUCTASE CHAIN 3; 1.
DR   Pfam; PF00507; Oxidored_q4; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Membrane; NAD; Quinone;
KW   Reference proteome; Translocase; Transmembrane; Transmembrane helix;
KW   Transport; Ubiquinone.
FT   CHAIN           1..130
FT                   /note="NADH-quinone oxidoreductase subunit A"
FT                   /id="PRO_0000362705"
FT   TRANSMEM        17..37
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01394"
FT   TRANSMEM        74..94
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01394"
FT   TRANSMEM        99..119
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01394"
SQ   SEQUENCE   130 AA;  14633 MW;  B3835B3675DC6972 CRC64;
     MLESSVVGIG KWVVEDYIFV GLFFVVACFI SCVMLALPVF IAPSSHERHK GDSYECGFDK
     LSSTGERFNV RFYLVGILFI IFDLEIIFLF PWAVSARELG PAAFVSVLIF LIILTVGFVY
     EFVSGALDWR
//