ID   NU2M_PARLI              Reviewed;         352 AA.
AC   P12771;
DT   01-OCT-1989, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1989, sequence version 1.
DT   25-MAY-2022, entry version 83.
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   Paracentrotus lividus (Common sea urchin).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Echinozoa; Echinoidea;
OC   Euechinoidea; Echinacea; Camarodonta; Echinidea; Echinidae; Paracentrotus.
OX   NCBI_TaxID=7656;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=2544576; DOI=10.1016/s0021-9258(18)60413-2;
RA   Cantatore P., Roberti M., Rainaldi G., Gadaleta M.N., Saccone C.;
RT   "The complete nucleotide sequence, gene organization, and genetic code of
RT   the mitochondrial genome of Paracentrotus lividus.";
RL   J. Biol. Chem. 264:10965-10975(1989).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 202-263.
RX   PubMed=3596250; DOI=10.1016/0378-1119(87)90091-6;
RA   Cantatore P., Roberti M., Morisco P., Rainaldi G., Gadaleta M.N.,
RA   Saccone C.;
RT   "A novel gene order in the Paracentrotus lividus mitochondrial genome.";
RL   Gene 53:41-54(1987).
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; J04815; AAA68134.1; -; Genomic_DNA.
DR   EMBL; M16517; AAA31988.2; -; Genomic_DNA.
DR   PIR; B34284; B34284.
DR   RefSeq; NP_008122.1; NC_001572.1.
DR   AlphaFoldDB; P12771; -.
DR   SMR; P12771; -.
DR   GeneID; 807709; -.
DR   CTD; 4536; -.
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..352
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000117620"
FT   TRANSMEM        4..24
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        26..46
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        124..144
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        150..170
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        178..198
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        205..225
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   352 AA;  39010 MW;  5BE9023550B65B9A CRC64;
     MHQMISIFLF LTVVSGTIIV VSAENWFVIW LGLELSTLAL IPILWFCFTP RNIEATIKYF
     LVQAFSAALL LNSALIQAWF SGSWSALIPM ESFPSLCLSV ALAFNLGLAA CHFWLPDVLQ
     GLPFIQGLII ATWQKIAPLF LLFYFNQLNF SYFIILAALI SILVGGWGGL NQTQTRKILA
     FSSIGNMGWI VVTSAFSLGT AAMMLFIYLV INTSIFLILD FLSIFTLGHL NNTSQLSPIS
     ITLVILTILS LGGLPPLTGF ILKFSSLYSL INNGFIFFSS VMIIGSLLSL FFYLRIAFNT
     TLILFPQHLI SLTAWRNSTE AEPLMAKTWL VSSFSVLSIL AIPLTIPLYI NV