ID   NU2M_DICCI              Reviewed;         491 AA.
AC   Q2LCP8;
DT   04-DEC-2007, integrated into UniProtKB/Swiss-Prot.
DT   21-FEB-2006, sequence version 1.
DT   25-MAY-2022, entry version 50.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 2;
DE            EC=7.1.1.2;
DE   AltName: Full=NADH dehydrogenase subunit 2;
GN   Name=nad2;
OS   Dictyostelium citrinum (Slime mold).
OG   Mitochondrion.
OC   Eukaryota; Amoebozoa; Evosea; Eumycetozoa; Dictyostelia; Dictyosteliales;
OC   Dictyosteliaceae; Dictyostelium.
OX   NCBI_TaxID=361072;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=18413355; DOI=10.1093/molbev/msn088;
RA   Heidel A.J., Gloeckner G.;
RT   "Mitochondrial genome evolution in the social amoebae.";
RL   Mol. Biol. Evol. 25:1440-1450(2008).
CC   -!- FUNCTION: Core subunit of the mitochondrial membrane respiratory chain
CC       NADH dehydrogenase (Complex I) that is believed to belong to the
CC       minimal assembly required for catalysis. Complex I functions in the
CC       transfer of electrons from NADH to the respiratory chain. The immediate
CC       electron acceptor for the enzyme is believed to be ubiquinone (By
CC       similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a ubiquinone + 5 H(+)(in) + NADH = a ubiquinol + 4 H(+)(out) +
CC         NAD(+); Xref=Rhea:RHEA:29091, Rhea:RHEA-COMP:9565, Rhea:RHEA-
CC         COMP:9566, ChEBI:CHEBI:15378, ChEBI:CHEBI:16389, ChEBI:CHEBI:17976,
CC         ChEBI:CHEBI:57540, ChEBI:CHEBI:57945; EC=7.1.1.2;
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane; Multi-pass membrane
CC       protein.
CC   -!- SIMILARITY: Belongs to the complex I subunit 2 family. {ECO:0000305}.
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DR   EMBL; DQ336395; ABC60395.1; -; Genomic_DNA.
DR   RefSeq; YP_492644.1; NC_007787.2.
DR   AlphaFoldDB; Q2LCP8; -.
DR   SMR; Q2LCP8; -.
DR   GeneID; 3912632; -.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005743; C:mitochondrial inner membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0070469; C:respirasome; IEA:UniProtKB-KW.
DR   GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; IEA:UniProtKB-EC.
DR   InterPro; IPR001750; ND/Mrp_mem.
DR   Pfam; PF00361; Proton_antipo_M; 1.
PE   3: Inferred from homology;
KW   Electron transport; Membrane; Mitochondrion; Mitochondrion inner membrane;
KW   NAD; Respiratory chain; Translocase; Transmembrane; Transmembrane helix;
KW   Transport; Ubiquinone.
FT   CHAIN           1..491
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000312391"
FT   TRANSMEM        11..31
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        38..58
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        74..94
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        106..126
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        129..149
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        161..181
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        210..230
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        238..258
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        270..290
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        298..318
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        330..350
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        375..395
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        411..433
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        463..483
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   491 AA;  55392 MW;  4DD82BDBB5377F46 CRC64;
     MVCLFENLMN MIKYSIYILP LIILIVLSIS IKKDVQRVHI IIQSLKLTLI VIMIVIGIEE
     SIYVKLNGHL IKTELIKLFE YLLLGVSYMI IKMFEEGVTE GKKTKITDEG LILIYSSIIG
     MLISMEAHNL ITLFLSLEIS SICFYILALN KNSRKGIEGG LKYYIIGGIA TTILLLGIVS
     IYKSTGSLMY TDLLVIVMEN TDDYRIQMGI ALIVLGLILK LGIAPFHGWL IDVYEGAGML
     MTFYLTITQK LVTLMVLINL YQNLIIYTNA IMFTNGLIIL ILVTLVVGTI GSLRQQKLIR
     FIAYSAIVNS ALLILMLAGS MSEELMVNSV YYLINYIIGL TVLMSLIMGF LRLNDRGTIE
     DIYQLKNMWV INMFGAIVYI LVLMYLAGLP PMTNFISKIL ILLPYMVLGR VYLTMLAFFL
     SVGVMIYYMN LVKIIIIDKV QTHEQGVAEL EITSKPTKGG RRIVLGVMWL IFSQLYLDEI
     LNVIKVIVAL I