ID   NU2M_SALSA              Reviewed;         349 AA.
AC   Q35924; Q9MPG9;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   30-MAY-2000, sequence version 2.
DT   03-AUG-2022, entry version 90.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 2;
DE            EC=7.1.1.2;
DE   AltName: Full=NADH dehydrogenase subunit 2;
GN   Name=MT-ND2; Synonyms=MTND2, NADH2, ND2;
OS   Salmo salar (Atlantic salmon).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Actinopterygii; Neopterygii; Teleostei; Protacanthopterygii; Salmoniformes;
OC   Salmonidae; Salmoninae; Salmo.
OX   NCBI_TaxID=8030;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   TISSUE=Liver;
RX   PubMed=10548724; DOI=10.1016/s0378-1119(99)00425-4;
RA   Hurst C.D., Bartlett S.E., Davidson W.S., Bruce I.J.;
RT   "The complete mitochondrial DNA sequence of the Atlantic salmon, Salmo
RT   salar.";
RL   Gene 239:237-242(1999).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Arnason U., Johnsson E., Rasmussen A.S.;
RT   "The complete mitochondrial genome sequence of a teleost, Salmo salar, and
RT   comparisons with other salmoniformes.";
RL   Submitted (MAR-1999) to the EMBL/GenBank/DDBJ databases.
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; U12143; AAD04734.1; -; Genomic_DNA.
DR   EMBL; AF133701; AAF61379.1; -; Genomic_DNA.
DR   PIR; T09948; T09948.
DR   RefSeq; NP_008446.1; NC_001960.1.
DR   AlphaFoldDB; Q35924; -.
DR   SMR; Q35924; -.
DR   STRING; 8030.ENSSSAP00000000003; -.
DR   GeneID; 808316; -.
DR   KEGG; sasa:808316; -.
DR   CTD; 4536; -.
DR   OMA; HFWVPEV; -.
DR   OrthoDB; 1153818at2759; -.
DR   Proteomes; UP000087266; Mitochondrion MT.
DR   Bgee; ENSSSAG00000000011; Expressed in brain and 16 other tissues.
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   GO; GO:0006120; P:mitochondrial electron transport, NADH to ubiquinone; IEA:InterPro.
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..349
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000117636"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        25..45
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        66..86
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        98..118
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        149..171
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        178..197
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        202..219
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        319..339
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   CONFLICT        79
FT                   /note="W -> R (in Ref. 2; AAF61379)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   349 AA;  37853 MW;  1690A416D81B5358 CRC64;
     MNPYVLTILL SSLGLGTILT FASSHWLLAW MGLEINTLAI IPIMAQQSHP RAIEATTKYF
     LTQATAAAMI LFASTTNAWL VGEWEIHQLS HPLATTTVML ALALKLGLAP VHFWLPEVLQ
     GLELTTGLIL STWQKLAPFA LMIQVAPTIN SSLLIAMGLL STLVGGWGGL NQTQLRKILA
     YSSIAHLGWM VLILQYAPSL TLLSLFLYII MTSSAFLTLK TNNSLTINTL ATSWTKSPTL
     AALTALVLLS LGGLPPLSGF MPKWLILQEL TKQGLPLSAT LAAMTALLSL YFYLRLCYAM
     TLTIYPNTLT ATAPWRLNFT LITLPLSIIT ILALGLLPLT PAVTTLLTL