ID   NU3M_FELCA              Reviewed;         115 AA.
AC   P48912;
DT   01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1996, sequence version 1.
DT   03-AUG-2022, entry version 99.
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   Felis catus (Cat) (Felis silvestris catus).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Laurasiatheria; Carnivora; Feliformia; Felidae; Felinae; Felis.
OX   NCBI_TaxID=9685;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Abyssinian {ECO:0000312|Proteomes:UP000011712}; TISSUE=Blood;
RX   PubMed=8660972; DOI=10.1006/geno.1996.0188;
RA   Lopez J.V., Cevario S., O'Brien S.J.;
RT   "Complete nucleotide sequences of the domestic cat (Felis catus)
RT   mitochondrial genome and a transposed mtDNA tandem repeat (Numt) in the
RT   nuclear genome.";
RL   Genomics 33:229-246(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; U20753; AAC48576.1; -; Genomic_DNA.
DR   PIR; T11409; T11409.
DR   RefSeq; NP_008258.1; NC_001700.1.
DR   AlphaFoldDB; P48912; -.
DR   SMR; P48912; -.
DR   STRING; 9685.ENSFCAP00000025716; -.
DR   Ensembl; ENSFCAT00000032652; ENSFCAP00000025716; ENSFCAG00000032067.
DR   GeneID; 807938; -.
DR   KEGG; fca:807938; -.
DR   CTD; 4537; -.
DR   VGNC; VGNC:80935; MT-ND3.
DR   eggNOG; KOG4662; Eukaryota.
DR   GeneTree; ENSGT00390000011605; -.
DR   HOGENOM; CLU_119549_3_1_1; -.
DR   InParanoid; P48912; -.
DR   OMA; RFPVKYY; -.
DR   OrthoDB; 1605459at2759; -.
DR   Proteomes; UP000011712; Mitochondrion.
DR   Bgee; ENSFCAG00000032067; Expressed in spleen and 9 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_0000117744"
FT   TRANSMEM        3..23
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        55..75
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        84..104
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   115 AA;  12944 MW;  1E8F4FE5769661C7 CRC64;
     MNVMLALLTN TLLSTLLVLI AFWLPQLNIY AEKASPYECG FDPMGSARLP FSMKFFLVAI
     TFLLFDLEIA LLLPLPWASQ TDKLPTMLTM ALLLISLLAA SLAYEWTQKG LEWTE