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COX2_CAERE
ID   COX2_CAERE              Reviewed;         230 AA.
AC   Q8SEM9; Q8SEN9; Q8SFX5;
DT   19-JUL-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2002, sequence version 1.
DT   03-AUG-2022, entry version 86.
DE   RecName: Full=Cytochrome c oxidase subunit 2;
DE            EC=7.1.1.9;
DE   AltName: Full=Cytochrome c oxidase polypeptide II;
DE   Flags: Fragment;
GN   Name=cox-2; Synonyms=coII;
OS   Caenorhabditis remanei (Caenorhabditis vulgaris).
OG   Mitochondrion {ECO:0000312|EMBL:AAM09710.1}.
OC   Eukaryota; Metazoa; Ecdysozoa; Nematoda; Chromadorea; Rhabditida;
OC   Rhabditina; Rhabditomorpha; Rhabditoidea; Rhabditidae; Peloderinae;
OC   Caenorhabditis.
OX   NCBI_TaxID=31234 {ECO:0000312|EMBL:AAM09710.1};
RN   [1] {ECO:0000305}
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND VARIANT ILE-79.
RC   STRAIN=CR1014, CR1415, CR2124, EM464, PB205, PB206, PB212, PB219, PB228,
RC   PB229, SB146, and VT733;
RX   PubMed=12019226; DOI=10.1093/genetics/161.1.99;
RA   Graustein A., Gaspar J.M., Walters J.R., Palopoli M.F.;
RT   "Levels of DNA polymorphism vary with mating system in the nematode genus
RT   Caenorhabditis.";
RL   Genetics 161:99-107(2002).
CC   -!- FUNCTION: Component of the cytochrome c oxidase, the last enzyme in the
CC       mitochondrial electron transport chain which drives oxidative
CC       phosphorylation. The respiratory chain contains 3 multisubunit
CC       complexes succinate dehydrogenase (complex II, CII), ubiquinol-
CC       cytochrome c oxidoreductase (cytochrome b-c1 complex, complex III,
CC       CIII) and cytochrome c oxidase (complex IV, CIV), that cooperate to
CC       transfer electrons derived from NADH and succinate to molecular oxygen,
CC       creating an electrochemical gradient over the inner membrane that
CC       drives transmembrane transport and the ATP synthase. Cytochrome c
CC       oxidase is the component of the respiratory chain that catalyzes the
CC       reduction of oxygen to water. Electrons originating from reduced
CC       cytochrome c in the intermembrane space (IMS) are transferred via the
CC       dinuclear copper A center (CU(A)) of subunit 2 and heme A of subunit 1
CC       to the active site in subunit 1, a binuclear center (BNC) formed by
CC       heme A3 and copper B (CU(B)). The BNC reduces molecular oxygen to 2
CC       water molecules using 4 electrons from cytochrome c in the IMS and 4
CC       protons from the mitochondrial matrix. {ECO:0000250|UniProtKB:P00410}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=4 Fe(II)-[cytochrome c] + 8 H(+)(in) + O2 = 4 Fe(III)-
CC         [cytochrome c] + 4 H(+)(out) + 2 H2O; Xref=Rhea:RHEA:11436,
CC         Rhea:RHEA-COMP:10350, Rhea:RHEA-COMP:14399, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:15379, ChEBI:CHEBI:29033,
CC         ChEBI:CHEBI:29034; EC=7.1.1.9;
CC         Evidence={ECO:0000250|UniProtKB:P00410};
CC       PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:11437;
CC         Evidence={ECO:0000250|UniProtKB:P00410};
CC   -!- COFACTOR:
CC       Name=Cu cation; Xref=ChEBI:CHEBI:23378;
CC         Evidence={ECO:0000250|UniProtKB:P00410};
CC       Note=Binds a dinuclear copper A center per subunit.
CC       {ECO:0000250|UniProtKB:P00410};
CC   -!- SUBUNIT: Component of the cytochrome c oxidase (complex IV, CIV), a
CC       multisubunit enzyme composed of a catalytic core of 3 subunits and
CC       several supernumerary subunits. The complex exists as a monomer or a
CC       dimer and forms supercomplexes (SCs) in the inner mitochondrial
CC       membrane with ubiquinol-cytochrome c oxidoreductase (cytochrome b-c1
CC       complex, complex III, CIII). {ECO:0000250|UniProtKB:P00410}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000250|UniProtKB:P00410}; Multi-pass membrane protein
CC       {ECO:0000250|UniProtKB:P00410}.
CC   -!- SIMILARITY: Belongs to the cytochrome c oxidase subunit 2 family.
CC       {ECO:0000305}.
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DR   EMBL; AF491508; AAM09710.1; -; Genomic_DNA.
DR   EMBL; AF491509; AAM09711.1; -; Genomic_DNA.
DR   EMBL; AF491510; AAM09712.1; -; Genomic_DNA.
DR   EMBL; AF491511; AAM09713.1; -; Genomic_DNA.
DR   EMBL; AF491512; AAM09714.1; -; Genomic_DNA.
DR   EMBL; AF491513; AAM09715.1; -; Genomic_DNA.
DR   EMBL; AF491514; AAM09716.1; -; Genomic_DNA.
DR   EMBL; AF491515; AAM09717.1; -; Genomic_DNA.
DR   EMBL; AF491516; AAM09718.1; -; Genomic_DNA.
DR   EMBL; AF491517; AAM09719.1; -; Genomic_DNA.
DR   EMBL; AF491518; AAM09720.1; -; Genomic_DNA.
DR   EMBL; AF491519; AAM09721.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q8SEM9; -.
DR   SMR; Q8SEM9; -.
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:0005507; F:copper ion binding; IEA:InterPro.
DR   GO; GO:0004129; F:cytochrome-c oxidase activity; IEA:UniProtKB-EC.
DR   CDD; cd13912; CcO_II_C; 1.
DR   Gene3D; 1.10.287.90; -; 1.
DR   Gene3D; 2.60.40.420; -; 1.
DR   InterPro; IPR045187; CcO_II.
DR   InterPro; IPR002429; CcO_II-like_C.
DR   InterPro; IPR034210; CcO_II_C.
DR   InterPro; IPR001505; Copper_CuA.
DR   InterPro; IPR008972; Cupredoxin.
DR   InterPro; IPR011759; Cyt_c_oxidase_su2_TM_dom.
DR   InterPro; IPR036257; Cyt_c_oxidase_su2_TM_sf.
DR   PANTHER; PTHR22888; PTHR22888; 1.
DR   Pfam; PF00116; COX2; 1.
DR   SUPFAM; SSF49503; SSF49503; 1.
DR   SUPFAM; SSF81464; SSF81464; 1.
DR   PROSITE; PS00078; COX2; 1.
DR   PROSITE; PS50857; COX2_CUA; 1.
DR   PROSITE; PS50999; COX2_TM; 1.
PE   3: Inferred from homology;
KW   Copper; Electron transport; Magnesium; Membrane; Metal-binding;
KW   Mitochondrion; Mitochondrion inner membrane; Respiratory chain;
KW   Translocase; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           <1..230
FT                   /note="Cytochrome c oxidase subunit 2"
FT                   /id="PRO_0000183527"
FT   TOPO_DOM        <1..29
FT                   /note="Mitochondrial intermembrane"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        30..50
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        51..63
FT                   /note="Mitochondrial matrix"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        64..84
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        85..230
FT                   /note="Mitochondrial intermembrane"
FT                   /evidence="ECO:0000255"
FT   BINDING         163
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="A1"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   BINDING         198
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="A1"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   BINDING         198
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="A2"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   BINDING         200
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="A2"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   BINDING         200
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="ligand shared with subunit 1"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   BINDING         202
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="A1"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   BINDING         202
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="A2"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   BINDING         206
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="A2"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   BINDING         209
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="A1"
FT                   /evidence="ECO:0000250|UniProtKB:P00410"
FT   VARIANT         79
FT                   /note="V -> I (in strain: SB146)"
FT                   /evidence="ECO:0000269|PubMed:12019226"
FT   NON_TER         1
FT                   /evidence="ECO:0000312|EMBL:AAM09710.1"
SQ   SEQUENCE   230 AA;  26459 MW;  4086C53A06107DEA CRC64;
     NNFFQGYNLL FQHSLFASYM DWFHAFNCSL LLGVLVFVTL LFGYLIFSTF YFKSKKIEYQ
     FGELLCSIFP TIILLMQMVP SLSLLYYYGL MNLDSNLTVK VTGHQWYWSY EYSDIPGLEF
     DSYMKSLDQL NLGEPRLLEV DNRCVIPCDT NIRFCITSAD VIHAWALNSL SVKLDAMSGI
     LSTFSYSFPM VGVFYGQCSE ICGANHSFMP IALEVTLLDN FKSWCFGTME
 
 
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