ID   NU3M_PATPE              Reviewed;         116 AA.
AC   P11991;
DT   01-OCT-1989, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1989, sequence version 1.
DT   25-MAY-2022, entry version 77.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 3;
DE            EC=7.1.1.2;
DE   AltName: Full=NADH dehydrogenase subunit 3;
GN   Name=ND3;
OS   Patiria pectinifera (Starfish) (Asterina pectinifera).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Asterozoa; Asteroidea;
OC   Valvatacea; Valvatida; Asterinidae; Patiria.
OX   NCBI_TaxID=7594;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=3678836; DOI=10.1016/0378-1119(87)90139-9;
RA   Himeno H., Masaki H., Kawai T., Ohta T., Kumagai I., Miura K., Watanabe K.;
RT   "Unusual genetic codes and a novel gene structure for tRNA(AGYSer) in
RT   starfish mitochondrial DNA.";
RL   Gene 56:219-230(1987).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   TISSUE=Ovary;
RX   PubMed=7672576; DOI=10.1093/genetics/140.3.1047;
RA   Asakawa S., Himeno H., Miura K., Watanabe K.;
RT   "Nucleotide sequence and gene organization of the starfish Asterina
RT   pectinifera mitochondrial genome.";
RL   Genetics 140:1047-1060(1995).
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}.
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DR   EMBL; M17619; AAA65515.2; -; Genomic_DNA.
DR   EMBL; D16387; BAA03873.1; -; Genomic_DNA.
DR   PIR; S70590; S70590.
DR   RefSeq; NP_008161.1; NC_001627.1.
DR   AlphaFoldDB; P11991; -.
DR   SMR; P11991; -.
DR   GeneID; 807820; -.
DR   CTD; 4537; -.
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; Respiratory chain;
KW   Translocase; Transmembrane; Transmembrane helix; Transport; Ubiquinone.
FT   CHAIN           1..116
FT                   /note="NADH-ubiquinone oxidoreductase chain 3"
FT                   /id="PRO_0000117711"
FT   TRANSMEM        10..30
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        64..84
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        88..108
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   116 AA;  13340 MW;  B5A51264D0E51F77 CRC64;
     MIYTNNIFNF LTLFVSILIF LITTLITFAA HFLPSRNTDS EKSSPYECGF DPLNSARVPF
     SFRFFLVAIL FLLFDLEIAL LFPLPFSVFF HPIHTPLILT VGLIFEWVQG GLDWAE