ID   NU3M_ORNAN              Reviewed;         115 AA.
AC   Q36456;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1997, sequence version 1.
DT   03-AUG-2022, entry version 98.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 3 {ECO:0000250|UniProtKB:P03897};
DE            EC=7.1.1.2 {ECO:0000250|UniProtKB:P03897};
DE   AltName: Full=NADH dehydrogenase subunit 3;
GN   Name=MT-ND3 {ECO:0000250|UniProtKB:P03897}; Synonyms=MTND3, NADH3, ND3;
OS   Ornithorhynchus anatinus (Duckbill platypus).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Monotremata; Ornithorhynchidae; Ornithorhynchus.
OX   NCBI_TaxID=9258;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Glennie {ECO:0000312|Proteomes:UP000002279};
RX   PubMed=8919867; DOI=10.1007/bf02198841;
RA   Janke A., Gemmell N.J., Feldmaier-Fuchs G., von Haeseler A., Paabo S.;
RT   "The mitochondrial genome of a monotreme--the platypus (Ornithorhynchus
RT   anatinus).";
RL   J. Mol. Evol. 42:153-159(1996).
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 of complex I.
CC       {ECO:0000250|UniProtKB:P03897}.
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:P03897};
CC   -!- SUBUNIT: Core subunit of respiratory chain NADH dehydrogenase (Complex
CC       I) which is composed of 45 different subunits. Interacts with TMEM186.
CC       Interacts with TMEM242 (By similarity). {ECO:0000250|UniProtKB:P03897}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000250|UniProtKB:P03898}; Multi-pass membrane protein
CC       {ECO:0000255}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 3 family. {ECO:0000305}.
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DR   EMBL; X83427; CAA58462.1; -; Genomic_DNA.
DR   PIR; H58888; H58888.
DR   RefSeq; NP_008050.1; NC_000891.1.
DR   AlphaFoldDB; Q36456; -.
DR   SMR; Q36456; -.
DR   STRING; 9258.ENSOANP00000024990; -.
DR   Ensembl; ENSOANT00000028493; ENSOANP00000024990; ENSOANG00000019369.
DR   GeneID; 808710; -.
DR   KEGG; oaa:808710; -.
DR   CTD; 4537; -.
DR   eggNOG; KOG4662; Eukaryota.
DR   GeneTree; ENSGT00390000011605; -.
DR   InParanoid; Q36456; -.
DR   OrthoDB; 1605459at2759; -.
DR   Proteomes; UP000002279; Mitochondrion.
DR   Bgee; ENSOANG00000019369; Expressed in adult mammalian kidney and 5 other tissues.
DR   GO; GO:0005743; C:mitochondrial inner membrane; ISS:UniProtKB.
DR   GO; GO:0005747; C:mitochondrial respiratory chain complex I; IEA:Ensembl.
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   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; Mitochondrion inner membrane;
KW   NAD; Reference proteome; Respiratory chain; Translocase; Transmembrane;
KW   Transmembrane helix; Transport; Ubiquinone.
FT   CHAIN           1..115
FT                   /note="NADH-ubiquinone oxidoreductase chain 3"
FT                   /id="PRO_0000117783"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        55..75
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        87..107
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   115 AA;  12847 MW;  4F84E64614402FE4 CRC64;
     MNLVIALLIN TGLATILVMV AFWLPQLYTY LEKSSPYECG FDPLGSARLP FSMKFFLVAI
     TFLLFDLEIA ILLPIPWASQ TSSPYSLLSL SGVLLALLTL GLAYEWLQKG LEWTE