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NU2M_PISOC
ID   NU2M_PISOC              Reviewed;         353 AA.
AC   P24996;
DT   01-MAR-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-1992, sequence version 1.
DT   25-MAY-2022, entry version 78.
DE   RecName: Full=NADH-ubiquinone oxidoreductase chain 2;
DE            EC=7.1.1.2;
DE   AltName: Full=NADH dehydrogenase subunit 2;
GN   Name=ND2;
OS   Pisaster ochraceus (Ochre sea star) (Asterias ochracea).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Asterozoa; Asteroidea;
OC   Forcipulatacea; Forcipulatida; Asteriidae; Pisaster.
OX   NCBI_TaxID=7612;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1976816; DOI=10.1007/bf02109496;
RA   Smith M.J., Banfield D.K., Doteval K., Gorski S., Kowbel D.J.;
RT   "Nucleotide sequence of nine protein-coding genes and 22 tRNAs in the
RT   mitochondrial DNA of the sea star Pisaster ochraceus.";
RL   J. Mol. Evol. 31:195-204(1990).
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; Multi-pass membrane
CC       protein.
CC   -!- SIMILARITY: Belongs to the complex I subunit 2 family. {ECO:0000305}.
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DR   EMBL; X55514; CAA39122.1; -; Genomic_DNA.
DR   PIR; S14203; S14203.
DR   AlphaFoldDB; P24996; -.
DR   SMR; P24996; -.
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   GO; GO:0006120; P:mitochondrial electron transport, NADH to ubiquinone; IEA:InterPro.
DR   InterPro; IPR010933; NADH_DH_su2_C.
DR   InterPro; IPR003917; NADH_UbQ_OxRdtase_chain2.
DR   InterPro; IPR001750; ND/Mrp_mem.
DR   Pfam; PF06444; NADH_dehy_S2_C; 1.
DR   Pfam; PF00361; Proton_antipo_M; 1.
DR   PRINTS; PR01436; NADHDHGNASE2.
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..353
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000117626"
FT   TRANSMEM        4..24
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        60..80
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        96..116
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        139..159
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        198..218
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        241..261
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        274..294
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        330..350
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   353 AA;  38771 MW;  092AE66053282D7E CRC64;
     MNRSVVLILL LNIIVSVVIV LSSHSWFSVC DGLELNTLSV LPILCGQFSP RGVESTIKYF
     LVQAFSAAMI LNVALVQLWL CSSWSVSCPL NSFSSIVLTL ALCLKLGLFP CHFWFPDVLQ
     GLSFLQGLLL STWQKVAPFI ILVSVCNIIS INVLTTLGCL SVLVGGWGGL NQSQVRKIMA
     FSSISHLGWI CSVLSYSIYV GCIMFVVYIV LSSTVFLINN EGNLYNLSSL ARLVYCNNVM
     GNVLVLVILS LGGLPPLTGF LNKFIALECL LSNNLLVPCA ILIVGSLLSL FFYLRISFNS
     VLCLFPQHSM MLFSWRNVSG YYGNTSFYTV LLSILSSMSI LGLLLVPALW SYH
 
 
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