ID   NU2M_ORNAN              Reviewed;         347 AA.
AC   Q36451;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1997, sequence version 1.
DT   03-AUG-2022, entry version 104.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 2 {ECO:0000250|UniProtKB:P03891};
DE            EC=7.1.1.2 {ECO:0000250|UniProtKB:P03891};
DE   AltName: Full=NADH dehydrogenase subunit 2;
GN   Name=MT-ND2 {ECO:0000250|UniProtKB:P03891}; Synonyms=MTND2, NADH2, ND2;
OS   Ornithorhynchus anatinus (Duckbill platypus).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Monotremata; Ornithorhynchidae; Ornithorhynchus.
OX   NCBI_TaxID=9258;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Glennie {ECO:0000312|Proteomes:UP000002279};
RX   PubMed=8919867; DOI=10.1007/bf02198841;
RA   Janke A., Gemmell N.J., Feldmaier-Fuchs G., von Haeseler A., Paabo S.;
RT   "The mitochondrial genome of a monotreme--the platypus (Ornithorhynchus
RT   anatinus).";
RL   J. Mol. Evol. 42:153-159(1996).
CC   -!- FUNCTION: Core subunit of the mitochondrial membrane respiratory chain
CC       NADH dehydrogenase (Complex I) which catalyzes electron transfer from
CC       NADH through the respiratory chain, using ubiquinone as an electron
CC       acceptor. Essential for the catalytic activity and assembly of complex
CC       I. {ECO:0000250|UniProtKB:P03891}.
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         Evidence={ECO:0000250|UniProtKB:P03891};
CC   -!- SUBUNIT: Core subunit of respiratory chain NADH dehydrogenase (Complex
CC       I) which is composed of 45 different subunits. Interacts with TMEM242
CC       (By similarity). {ECO:0000250|UniProtKB:P03891,
CC       ECO:0000250|UniProtKB:P03892}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000250|UniProtKB:P03892}; Multi-pass membrane protein
CC       {ECO:0000255}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 2 family. {ECO:0000305}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; X83427; CAA58456.1; -; Genomic_DNA.
DR   PIR; B58888; B58888.
DR   RefSeq; NP_008044.1; NC_000891.1.
DR   AlphaFoldDB; Q36451; -.
DR   SMR; Q36451; -.
DR   STRING; 9258.ENSOANP00000024996; -.
DR   Ensembl; ENSOANT00000028508; ENSOANP00000024996; ENSOANG00000019384.
DR   GeneID; 808700; -.
DR   KEGG; oaa:808700; -.
DR   CTD; 4536; -.
DR   eggNOG; KOG4668; Eukaryota.
DR   GeneTree; ENSGT00730000111348; -.
DR   InParanoid; Q36451; -.
DR   OrthoDB; 1153818at2759; -.
DR   Proteomes; UP000002279; Mitochondrion.
DR   Bgee; ENSOANG00000019384; Expressed in cerebellum and 7 other tissues.
DR   GO; GO:0005743; C:mitochondrial inner membrane; ISS:UniProtKB.
DR   GO; GO:0005747; C:mitochondrial respiratory chain complex I; IBA:GO_Central.
DR   GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; ISS:UniProtKB.
DR   GO; GO:0006120; P:mitochondrial electron transport, NADH to ubiquinone; ISS:UniProtKB.
DR   GO; GO:0032981; P:mitochondrial respiratory chain complex I assembly; ISS:UniProtKB.
DR   GO; GO:0072593; P:reactive oxygen species metabolic process; IEA:Ensembl.
DR   InterPro; IPR010933; NADH_DH_su2_C.
DR   InterPro; IPR003917; NADH_UbQ_OxRdtase_chain2.
DR   InterPro; IPR001750; ND/Mrp_mem.
DR   Pfam; PF06444; NADH_dehy_S2_C; 1.
DR   Pfam; PF00361; Proton_antipo_M; 1.
DR   PRINTS; PR01436; NADHDHGNASE2.
PE   3: Inferred from homology;
KW   Electron transport; Membrane; Mitochondrion; Mitochondrion inner membrane;
KW   NAD; Reference proteome; Respiratory chain; Translocase; Transmembrane;
KW   Transmembrane helix; Transport; Ubiquinone.
FT   CHAIN           1..347
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000117615"
FT   TRANSMEM        1..21
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        26..46
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        56..76
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        96..116
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        153..171
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        178..198
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        199..219
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        237..257
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        277..297
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        326..346
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   347 AA;  38823 MW;  D118FB62EB3AEF62 CRC64;
     MTPMTTLIML FSLLLGTTLT LTSSHWLLMW MGLEVSTLAI IPLLTYTNHP RSIESAIKYF
     LTQATASMLL MFAASLNTWM TGHWTLMQID NTISSGIMTF ALAMKLGLAP FHYWVPEVLQ
     GSSLMSGMIL LTWQKLAPIS IIYQISPTLN MDILLTLAIS STLLGGWNGL NQTQLRKVMA
     YSSIAHMGWM VLIIIYFPTL TTLNLTLYIM STVALFTVFH TTNITKTKPL SLMWNKAPIM
     TLAIILLLLS LGGLPPLTGF APKWLVIQEL IKHDNMIMAT VLAITALLNL FFYMRIIYSS
     TLTTFPTTNN NKFHWYSKST KNPLSLPTLV ILSTTLLPLT PMFITLS