ID   NU1M_ARBLI              Reviewed;         125 AA.
AC   Q33756;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 68.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 1;
DE            EC=7.1.1.2;
DE   AltName: Full=NADH dehydrogenase subunit 1;
DE   Flags: Fragment;
GN   Name=ND1;
OS   Arbacia lixula (Black urchin) (Echinus lixula).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Echinozoa; Echinoidea;
OC   Euechinoidea; Echinacea; Arbacioida; Arbaciidae; Arbacia.
OX   NCBI_TaxID=7640;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1681410; DOI=10.1093/oxfordjournals.molbev.a040661;
RA   de Giorgi C., Lanave C., Musci M.D., Saccone C.;
RT   "Mitochondrial DNA in the sea urchin Arbacia lixula: evolutionary
RT   inferences from nucleotide sequence analysis.";
RL   Mol. Biol. Evol. 8:515-529(1991).
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 inner membrane {ECO:0000250};
CC       Multi-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the complex I subunit 1 family. {ECO:0000305}.
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DR   EMBL; M74840; AAA99052.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q33756; -.
DR   SMR; Q33756; -.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005743; C:mitochondrial inner 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   InterPro; IPR001694; NADH_UbQ_OxRdtase_su1/FPO.
DR   PANTHER; PTHR11432; PTHR11432; 1.
DR   Pfam; PF00146; NADHdh; 1.
PE   3: Inferred from homology;
KW   Electron transport; Membrane; Mitochondrion; Mitochondrion inner membrane;
KW   NAD; Respiratory chain; Translocase; Transmembrane; Transmembrane helix;
KW   Transport; Ubiquinone.
FT   CHAIN           1..>125
FT                   /note="NADH-ubiquinone oxidoreductase chain 1"
FT                   /id="PRO_0000117345"
FT   TRANSMEM        5..25
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        74..94
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        105..125
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   NON_TER         125
SQ   SEQUENCE   125 AA;  13793 MW;  7820CBC029FAAA46 CRC64;
     MYAYIFAFFE LITFLVPVLL AVAFLTLVER KVLGYMQFRK GPNVVGLTDF CNLFADGLKL
     FIKETVKPSS ASPYLFFASP VLFLTLALLL WNFMPVTSPA LDLQLSLLLV LGLSSLSVYA
     ILGSG