ID   NU3M_TETNG              Reviewed;         117 AA.
AC   Q4JQI0;
DT   22-NOV-2005, integrated into UniProtKB/Swiss-Prot.
DT   02-AUG-2005, sequence version 1.
DT   25-MAY-2022, entry version 75.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 3;
DE            EC=7.1.1.2;
DE   AltName: Full=NADH dehydrogenase subunit 3;
GN   Name=MT-ND3; Synonyms=MTND3, NADH3, ND3;
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 membrane {ECO:0000250}; Multi-pass
CC       membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 3 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; DQ019313; AAY26166.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q4JQI0; -.
DR   SMR; Q4JQI0; -.
DR   STRING; 99883.ENSTNIP00000000394; -.
DR   Ensembl; ENSTNIT00000001678; ENSTNIP00000000394; ENSTNIG00000000069.
DR   GeneTree; ENSGT00390000011605; -.
DR   HOGENOM; CLU_119549_3_1_1; -.
DR   InParanoid; Q4JQI0; -.
DR   OMA; RFPVKYY; -.
DR   TreeFam; TF343336; -.
DR   Proteomes; UP000007303; Mitochondrion.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0031966; C:mitochondrial 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   Gene3D; 1.20.58.1610; -; 1.
DR   InterPro; IPR000440; NADH_UbQ/plastoQ_OxRdtase_su3.
DR   InterPro; IPR038430; NDAH_ubi_oxred_su3_sf.
DR   PANTHER; PTHR11058; PTHR11058; 1.
DR   Pfam; PF00507; Oxidored_q4; 1.
PE   3: Inferred from homology;
KW   Electron transport; Membrane; Mitochondrion; NAD; Reference proteome;
KW   Respiratory chain; Translocase; Transmembrane; Transmembrane helix;
KW   Transport; Ubiquinone.
FT   CHAIN           1..117
FT                   /note="NADH-ubiquinone oxidoreductase chain 3"
FT                   /id="PRO_0000117838"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        56..76
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        85..105
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   117 AA;  13332 MW;  A781F076EBFE3F3B CRC64;
     MNLLLTILFI TTILSLILAI VSFWLPLMTP DYQKLSPYEC GFDPLGSARL PFSIRFFLVA
     ILFLLFDLEI ALLLPLPWGD QLPSPMFTLL WASALLIMLT LGLIYEWLQG GLEWAEK