ID   NU4M_PELSU              Reviewed;         459 AA.
AC   O79677;
DT   15-JUL-1999, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   25-MAY-2022, entry version 79.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 4;
DE            EC=7.1.1.2;
DE   AltName: Full=NADH dehydrogenase subunit 4;
GN   Name=MT-ND4; Synonyms=MTND4, NADH4, ND4;
OS   Pelomedusa subrufa (African side-necked turtle).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Archelosauria; Testudinata; Testudines; Pleurodira; Pelomedusidae;
OC   Pelomedusa.
OX   NCBI_TaxID=44522;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=9826682; DOI=10.1073/pnas.95.24.14226;
RA   Zardoya R., Meyer A.;
RT   "Complete mitochondrial genome suggests diapsid affinities of turtles.";
RL   Proc. Natl. Acad. Sci. U.S.A. 95:14226-14231(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 membrane {ECO:0000250}; Multi-pass
CC       membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 4 family. {ECO:0000305}.
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DR   EMBL; AF039066; AAD05057.1; -; Genomic_DNA.
DR   PIR; T11110; T11110.
DR   RefSeq; NP_008441.1; NC_001947.1.
DR   AlphaFoldDB; O79677; -.
DR   SMR; O79677; -.
DR   GeneID; 808289; -.
DR   CTD; 4538; -.
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   GO; GO:0042773; P:ATP synthesis coupled electron transport; IEA:InterPro.
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; NAD; Respiratory chain;
KW   Translocase; Transmembrane; Transmembrane helix; Transport; Ubiquinone.
FT   CHAIN           1..459
FT                   /note="NADH-ubiquinone oxidoreductase chain 4"
FT                   /id="PRO_0000117966"
FT   TRANSMEM        22..42
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        61..81
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        94..113
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        114..134
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        146..166
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        197..217
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        225..245
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        258..278
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        285..304
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        308..330
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        352..372
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        380..400
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        437..457
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   459 AA;  51629 MW;  89BC451BD09482CC CRC64;
     MLKLLLPMIM LLPTSWLCKK NHLSYTTLLF SFTIALLSLQ WLKPPFELTT TFSNTYMGVD
     PISTPLLILT SWMTPLMILV SKNHLIQEPL SRKRTFTTTI ISLQISLTLA FSALEMMLFF
     TMFEATLIPT LIIITRWGNQ MERLSAGTYF LFYTLIGSLP LLIALTSLHT NYNTLSLFIL
     QLNPPNLTNS WAHTMWWFAL LMAFMIKMPL YGLHLWLPKA HVEAPIAGSM ILAGVLLKLG
     GYGIIRVTLM LNPLTKSLSY PFMTLSLWGI IMTGLICLRQ TDLKSLIAYS SVGLMGLVIS
     AALLQTPLSI TGAIILMIAH GLSSSMLFCL ANTNYERTHN RTLLLTHSMQ TLLPLMTIWW
     LLASLMNMAL PPTINLMGEL TIIASLFSWA NITIILTGLG TLISALYSLH MFSTTQWGGT
     PPHHMHTITP SHTREHLIMM LHMVPLILLM MKPQLMTTF