ID   NU2M_ELEMA              Reviewed;         347 AA.
AC   Q2I3H3;
DT   18-APR-2006, integrated into UniProtKB/Swiss-Prot.
DT   07-MAR-2006, sequence version 1.
DT   25-MAY-2022, entry version 49.
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   Elephas maximus (Indian elephant).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Afrotheria; Proboscidea; Elephantidae; Elephas.
OX   NCBI_TaxID=9783;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   TISSUE=Blood;
RX   PubMed=16448217; DOI=10.1371/journal.pbio.0040073;
RA   Rogaev E.I., Moliaka Y.K., Malyarchuk B.A., Kondrashov F.A., Derenko M.V.,
RA   Chumakov I., Grigorenko A.P.;
RT   "Complete mitochondrial genome and phylogeny of Pleistocene mammoth
RT   Mammuthus primigenius.";
RL   PLoS Biol. 4:403-410(2006).
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}.
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DR   EMBL; DQ316068; ABC17892.1; -; Genomic_DNA.
DR   RefSeq; YP_626368.1; NC_005129.2.
DR   AlphaFoldDB; Q2I3H3; -.
DR   SMR; Q2I3H3; -.
DR   GeneID; 2610368; -.
DR   CTD; 4536; -.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005743; C:mitochondrial inner membrane; ISS:UniProtKB.
DR   GO; GO:0070469; C:respirasome; IEA:UniProtKB-KW.
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   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; Respiratory chain; Translocase; Transmembrane; Transmembrane helix;
KW   Transport; Ubiquinone.
FT   CHAIN           1..347
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000232848"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        59..79
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        93..115
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        150..170
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        178..198
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        200..220
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        240..260
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        274..294
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        326..346
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   347 AA;  38988 MW;  E563A1BA6E8C254B CRC64;
     MNPLALSLIL TTLFTGTLIT MMSSHWLTAW MGLEMNMLTM IPILMKTTNP RSTEAATKYF
     MTQATASMML MMALTINLMY SGQWSITKMT NPVASNVALM ALMTKLGSAP FHFWVPEVTQ
     GVELTPGMIL LTWQKLAPLS LLYQMATYTN TNLIYLSGLL SILIGGWGGL NQTQLRKILA
     YSSISHMGWM LIILPFNPTL TLLNLAIYIL LTLSIFMILA NTFTTSMSSL TLMWNKTPAM
     TIMLMTTLLS LGGLPPLSGF TPKWLMIHEL TKNNSIIMPL TMAIMTLLNM YFYTRLIYYS
     SLTILPSTNN MKMTWQFTNT KHTMMLPTLI TLSNMLLPLT PMISMLE