ID   NU2M_STRPU              Reviewed;         352 AA.
AC   P15549;
DT   01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1990, sequence version 1.
DT   03-AUG-2022, entry version 95.
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   Strongylocentrotus purpuratus (Purple sea urchin).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Echinozoa; Echinoidea;
OC   Euechinoidea; Echinacea; Camarodonta; Echinidea; Strongylocentrotidae;
OC   Strongylocentrotus.
OX   NCBI_TaxID=7668;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=3172215; DOI=10.1016/0022-2836(88)90452-4;
RA   Jacobs H.T., Elliott D.J., Math V.B., Farquharson A.;
RT   "Nucleotide sequence and gene organization of sea urchin mitochondrial
RT   DNA.";
RL   J. Mol. Biol. 202:185-217(1988).
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; X12631; CAA31152.1; -; Genomic_DNA.
DR   PIR; S01500; S01500.
DR   RefSeq; NP_006966.1; NC_001453.1.
DR   AlphaFoldDB; P15549; -.
DR   SMR; P15549; -.
DR   EnsemblMetazoa; GeneID_2652717_df_mr; NP_006966; GeneID_2652717.
DR   GeneID; 2652717; -.
DR   KEGG; spu:2652717; -.
DR   CTD; 4536; -.
DR   InParanoid; P15549; -.
DR   OMA; HFWVPEV; -.
DR   OrthoDB; 1153818at2759; -.
DR   PhylomeDB; P15549; -.
DR   Proteomes; UP000007110; Unassembled WGS sequence.
DR   GO; GO:0005747; C:mitochondrial respiratory chain complex I; IBA:GO_Central.
DR   GO; GO:0008137; F:NADH dehydrogenase (ubiquinone) activity; IBA:GO_Central.
DR   GO; GO:0006120; P:mitochondrial electron transport, NADH to ubiquinone; IBA:GO_Central.
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; Reference proteome; Respiratory chain; Translocase; Transmembrane;
KW   Transmembrane helix; Transport; Ubiquinone.
FT   CHAIN           1..352
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000117641"
FT   TRANSMEM        4..24
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        26..46
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        67..87
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        96..116
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        124..144
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        148..168
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        177..197
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        264..284
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        290..310
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        332..352
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   352 AA;  38653 MW;  3C44E423AEC81019 CRC64;
     MRQIVSTFLF VTVVSGTIIV VSSENWFIIW VGLELSTLAL VPILCSGFSP RNVEADNKYF
     LVQASSAALL LNGALGQAWL TGSWSILDPV NEVTSICLSI ALAFKIGLAP VHFWFPDVLQ
     GLPFFQGLII ATWQKIAPLI LMFYFSQLGF SYLLITPSLI SVLIGGWGGL NQTQVRKILA
     FSSIGNMGWL VITSAYSFNA AIIMLVIYLI INTSLFLLFD HLKVSTLGHL NTISQLSPIS
     VALVLLVMLS LGGLPPLTGF ILKFTSLYFL VANNFIILSS IMIIGNLQDY FFYLRISFNT
     SLFLFPQHII SSASWRNSTI ISPLAPKAWL SSVSTVLSTL AIPLTLPLYI IT