ID   NU2M_LUMTE              Reviewed;         335 AA.
AC   Q34951;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 80.
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   Lumbricus terrestris (Common earthworm).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Annelida; Clitellata;
OC   Oligochaeta; Crassiclitellata; Lumbricina; Lumbricidae; Lumbricinae;
OC   Lumbricus.
OX   NCBI_TaxID=6398;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8536978; DOI=10.1093/genetics/141.1.305;
RA   Boore J.L., Brown W.M.;
RT   "Complete sequence of the mitochondrial DNA of the annelid worm Lumbricus
RT   terrestris.";
RL   Genetics 141:305-319(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 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; U24570; AAC46876.1; -; Genomic_DNA.
DR   PIR; S58997; S58997.
DR   RefSeq; NP_008250.1; NC_001673.1.
DR   AlphaFoldDB; Q34951; -.
DR   SMR; Q34951; -.
DR   GeneID; 807920; -.
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; IPR003917; NADH_UbQ_OxRdtase_chain2.
DR   InterPro; IPR001750; ND/Mrp_mem.
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..335
FT                   /note="NADH-ubiquinone oxidoreductase chain 2"
FT                   /id="PRO_0000117603"
FT   TRANSMEM        7..27
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        28..48
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        58..78
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        81..101
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        110..130
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        147..167
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        174..194
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        200..220
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        240..260
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        274..294
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        315..335
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   335 AA;  37213 MW;  BD69C58681051261 CRC64;
     MKYIKSPTMA LAMSTLIMST LMAVSSANWM FLWGAMELNL LSFIPIMMQS NNNQETEGAV
     KYFLAQALGS ALLLMSSTSM WMTFSMISNF MPLTLMAAIM LKLGSVPCHF WYPSVMASIS
     WVSCLILSSW QKLAPLSILA FLLPQKNMNF MLSMAAMNAL LGGVIGMNQT QLRTIMAYSS
     IGHIGWMMSL AAVYKPSSCI MYFVVYCILI TPLFMTMGYL NMFSTKHMSK LSSYSSTVHM
     ALLMVLLSLG GLPPFTGFMP KLMTIMLLMQ SMKIILLILI AGSIMNLFFY LNIIISSMPL
     PPHLKNVDST DIKCSLKFVI PICTLSLGLS PFIML