ID   NU2M_TETNG              Reviewed;         348 AA.
AC   Q4JQI6;
DT   22-NOV-2005, integrated into UniProtKB/Swiss-Prot.
DT   02-AUG-2005, sequence version 1.
DT   25-MAY-2022, entry version 82.
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   Tetraodon nigroviridis (Spotted green pufferfish) (Chelonodon
OS   nigroviridis).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Actinopterygii; Neopterygii; Teleostei; Neoteleostei; Acanthomorphata;
OC   Eupercaria; Tetraodontiformes; Tetradontoidea; Tetraodontidae; Tetraodon.
OX   NCBI_TaxID=99883;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=17076253; DOI=10.1080/10425170600700378;
RA   Yue G.H., Lo L.C., Zhu Z.Y., Lin G., Feng F.;
RT   "The complete nucleotide sequence of the mitochondrial genome of Tetraodon
RT   nigroviridis.";
RL   DNA Seq. 17:115-121(2006).
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; DQ019313; AAY26165.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q4JQI6; -.
DR   SMR; Q4JQI6; -.
DR   STRING; 99883.ENSTNIP00000007011; -.
DR   Ensembl; ENSTNIT00000007167; ENSTNIP00000007011; ENSTNIG00000004377.
DR   GeneTree; ENSGT00730000111348; -.
DR   HOGENOM; CLU_007100_1_3_1; -.
DR   InParanoid; Q4JQI6; -.
DR   OMA; HFWVPEV; -.
DR   TreeFam; TF343996; -.
DR   Proteomes; UP000007303; Mitochondrion.
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_0000117642"
FT   TRANSMEM        1..21
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        177..194
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        198..220
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        238..258
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        273..293
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        328..348
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   348 AA;  37952 MW;  DD213E6E10827EB9 CRC64;
     MSPYITASLL FGLLLGPTIT ATSSHWLIAW MGLEINTLAI IPLMAQHHHP RAVEATTKYF
     LTQATAAAML LFASTTNAWL TGQWELQQMT HPLPSTLIIL ALALKIGLAP LHTWLPEVLQ
     GLDLTTGLIL STWQKLAPFA LLLQLQPNNP TLLVILGVLS TLIGGWGGLN QTQLRKILAY
     SSIAHLGWMI LILQFSPTLT LLTLMLYLIM TSSAFLTFIL NKTTTINALA TSWAKTPILT
     SLLPLVLLSL GGLPPLTGFM PKWLILQELT KHDLAPTATL AALSALLSLY FYLRLSYAMT
     LTIAPNNLTG TLPWRTQTTQ PNMMTATMAA SSILLLPMTP GILTLFNI