ID   NU4M_BALMU              Reviewed;         459 AA.
AC   P41298;
DT   01-FEB-1995, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1995, sequence version 1.
DT   03-AUG-2022, entry version 82.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 4;
DE            EC=7.1.1.2 {ECO:0000250|UniProtKB:P03905};
DE   AltName: Full=NADH dehydrogenase subunit 4;
GN   Name=MT-ND4; Synonyms=MTND4, NADH4, ND4;
OS   Balaenoptera musculus (Blue whale).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Laurasiatheria; Artiodactyla; Whippomorpha; Cetacea; Mysticeti;
OC   Balaenopteridae; Balaenoptera.
OX   NCBI_TaxID=9771;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8308901; DOI=10.1007/bf00178861;
RA   Arnason U., Gullberg A.;
RT   "Comparison between the complete mtDNA sequences of the blue and the fin
RT   whale, two species that can hybridize in nature.";
RL   J. Mol. Evol. 37:312-322(1993).
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:P03905}.
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:P03905};
CC   -!- SUBUNIT: Core subunit of respiratory chain NADH dehydrogenase (Complex
CC       I) which is composed of 45 different subunits.
CC       {ECO:0000250|UniProtKB:P03910}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000250|UniProtKB:P03910}; Multi-pass membrane protein
CC       {ECO:0000255}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 4 family. {ECO:0000305}.
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DR   EMBL; X72204; CAA51004.1; -; Genomic_DNA.
DR   PIR; S41829; S41829.
DR   RefSeq; NP_007065.1; NC_001601.1.
DR   AlphaFoldDB; P41298; -.
DR   SMR; P41298; -.
DR   GeneID; 807734; -.
DR   CTD; 4538; -.
DR   Proteomes; UP000694857; Mitochondrion MT.
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; IPR000260; NADH4_N.
DR   InterPro; IPR010227; NADH_Q_OxRdtase_chainM/4.
DR   InterPro; IPR003918; NADH_UbQ_OxRdtase.
DR   InterPro; IPR001750; ND/Mrp_mem.
DR   PANTHER; PTHR43507; PTHR43507; 1.
DR   Pfam; PF01059; Oxidored_q5_N; 1.
DR   Pfam; PF00361; Proton_antipo_M; 1.
DR   PRINTS; PR01437; NUOXDRDTASE4.
DR   TIGRFAMs; TIGR01972; NDH_I_M; 1.
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..459
FT                   /note="NADH-ubiquinone oxidoreductase chain 4"
FT                   /id="PRO_0000117899"
FT   TRANSMEM        22..42
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        60..80
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        92..112
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        113..133
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        147..167
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        193..213
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        224..244
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        257..277
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        284..303
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        307..329
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        350..370
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        393..413
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        435..455
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   459 AA;  51733 MW;  16F543CA47227476 CRC64;
     MLKFIIPTIM LMPLTWLSKN NLIWINSTAH SLLISFSSLL LLNQLNDNSL NYSLIFFSDP
     LSTPLLMLTM WLLPLMLMAS QSHLIKEPPV RKKLYITMLI MLQALLIMTF TATELILFYI
     MFEATLIPTL IIITRWGNQT ERLNAGLYFL FYTLIGSLPL LVALVYLQNT TGSLNFLLLQ
     HWAKPLSASW SNIFMWLACM MAFLVKMPLY GLHLWLPKAH VEAPIAGSMV LAAVLLKLGG
     YGMLRITSML NPLTEHMAYP FLMLSLWGMI MTSSICLRQT DLKSLIAYSS VSHMALVIAA
     ILIQTPWSYM GATALMIAHG LTSSMLFCLA NSNYERIHSR TMILARGLQV LLPLMATWWL
     LASLTNLALP PTINLVGELL VVMSVFSWSN PTILLMGANI VITALYTLYM LIMTQRGKHT
     HHINNIIPSF TREHALMALH IIPLLLLSLN PKIILGPLY