ID   NU2M_CARAU              Reviewed;         348 AA.
AC   O78680;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   25-MAY-2022, entry version 78.
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   Carassius auratus (Goldfish).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Cypriniformes;
OC   Cyprinidae; Cyprininae; Carassius.
OX   NCBI_TaxID=7957;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=AZ3 / Langsdorfi; TISSUE=Oocyte;
RA   Murakami M., Yamashita Y., Fujitani H.;
RT   "The complete sequence of mitochondrial genome from a gynogenetic triploid
RT   'ginbuna' (Carassius auratus langsdorfi).";
RL   Zool. Sci. 15:335-337(1998).
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; AB006953; BAA31239.1; -; Genomic_DNA.
DR   RefSeq; NP_008589.1; NC_002079.1.
DR   AlphaFoldDB; O78680; -.
DR   SMR; O78680; -.
DR   Ensembl; ENSCART00000000011; ENSCARP00000000003; ENSCARG00000000011.
DR   GeneID; 808429; -.
DR   CTD; 4536; -.
DR   Proteomes; UP000515129; Mitochondrion MT.
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..348
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000117567"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        60..80
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        96..116
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        149..169
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        246..266
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   348 AA;  37879 MW;  0747C30C282486EB CRC64;
     MNPYVLMILL SSLGLGTTLT FASSHWLLAW MGLEINTLAI TPLMAQHHHP RAVEATTKYF
     LTQATAAAMI LFASTTNAWM TGEWSITDLS DPLANTMFMT ALALKIGLAP MHFWMPEVLQ
     GLDLLTGLIL STWQKLAPFA LIIQTAQNID PLLLTLLGVT STLVGGWGGL NQTQLRKILA
     YSSIAHMGWM IIVIQYAPQL TLLALGTYII MTSAAFLTLK MSLTTKVSTL ATTWSKSPIL
     TATTALVLLS LGGLPPLTGF MPKWLILQEL TKQDLPIIAT TMALAALISL YFYLRLCYAM
     TLTISPNTTN STTPWRTQTT QASMPLALFT MATLGLLPMT PAILTLTT