ID   COX1_CHOOC              Reviewed;         513 AA.
AC   P67793; P50670;
DT   11-OCT-2004, integrated into UniProtKB/Swiss-Prot.
DT   03-OCT-2006, sequence version 2.
DT   22-FEB-2023, entry version 79.
DE   RecName: Full=Cytochrome c oxidase subunit 1;
DE            EC=7.1.1.9;
DE   AltName: Full=Cytochrome c oxidase polypeptide I;
GN   Name=COI;
OS   Choristoneura occidentalis (Western spruce budworm).
OG   Mitochondrion.
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Hexapoda; Insecta; Pterygota;
OC   Neoptera; Endopterygota; Lepidoptera; Glossata; Ditrysia; Tortricoidea;
OC   Tortricidae; Tortricinae; Choristoneura.
OX   NCBI_TaxID=27541;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND SEQUENCE REVISION TO 462.
RA   Roe A., Sperling F.A.H.;
RL   Submitted (MAY-2012) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 240-513.
RC   STRAIN=Isolate 16;
RX   PubMed=8078404; DOI=10.1093/oxfordjournals.molbev.a040144;
RA   Sperling F.A.H., Hickey D.A.;
RT   "Mitochondrial DNA sequence variation in the spruce budworm species complex
RT   (Choristoneura: Lepidoptera).";
RL   Mol. Biol. Evol. 11:656-665(1994).
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:P00401}.
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:P00401};
CC       PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:11437;
CC         Evidence={ECO:0000250|UniProtKB:P00401};
CC   -!- COFACTOR:
CC       Name=heme; Xref=ChEBI:CHEBI:30413;
CC         Evidence={ECO:0000250|UniProtKB:P00401};
CC       Note=Binds 2 heme A groups non-covalently per subunit.
CC       {ECO:0000250|UniProtKB:P00401};
CC   -!- COFACTOR:
CC       Name=Cu cation; Xref=ChEBI:CHEBI:23378;
CC         Evidence={ECO:0000250|UniProtKB:P00401};
CC       Note=Binds a copper B center. {ECO:0000250|UniProtKB:P00401};
CC   -!- PATHWAY: Energy metabolism; oxidative phosphorylation.
CC       {ECO:0000250|UniProtKB:P00401}.
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:P00401}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000250|UniProtKB:P00401}; Multi-pass membrane protein
CC       {ECO:0000250|UniProtKB:P00401}.
CC   -!- SIMILARITY: Belongs to the heme-copper respiratory oxidase family.
CC       {ECO:0000305}.
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DR   EMBL; L19094; AAA53646.3; -; Genomic_DNA.
DR   EMBL; L19097; AAA53642.1; -; Genomic_DNA.
DR   AlphaFoldDB; P67793; -.
DR   SMR; P67793; -.
DR   UniPathway; UPA00705; -.
DR   GO; GO:0005743; C:mitochondrial inner membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0045277; C:respiratory chain complex IV; IEA:InterPro.
DR   GO; GO:0004129; F:cytochrome-c oxidase activity; IEA:UniProtKB-EC.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0006119; P:oxidative phosphorylation; IEA:UniProtKB-UniPathway.
DR   CDD; cd01663; Cyt_c_Oxidase_I; 1.
DR   Gene3D; 1.20.210.10; Cytochrome c oxidase-like, subunit I domain; 1.
DR   InterPro; IPR023616; Cyt_c_oxase-like_su1_dom.
DR   InterPro; IPR036927; Cyt_c_oxase-like_su1_sf.
DR   InterPro; IPR000883; Cyt_C_Oxase_1.
DR   InterPro; IPR023615; Cyt_c_Oxase_su1_BS.
DR   InterPro; IPR033944; Cyt_c_oxase_su1_dom.
DR   PANTHER; PTHR10422; CYTOCHROME C OXIDASE SUBUNIT 1; 1.
DR   PANTHER; PTHR10422:SF18; CYTOCHROME C OXIDASE SUBUNIT 1; 1.
DR   Pfam; PF00115; COX1; 1.
DR   PRINTS; PR01165; CYCOXIDASEI.
DR   SUPFAM; SSF81442; Cytochrome c oxidase subunit I-like; 1.
DR   PROSITE; PS50855; COX1; 1.
DR   PROSITE; PS00077; COX1_CUB; 1.
PE   3: Inferred from homology;
KW   Calcium; Copper; Electron transport; Heme; Iron; Magnesium; Membrane;
KW   Metal-binding; Mitochondrion; Mitochondrion inner membrane;
KW   Respiratory chain; Translocase; Transmembrane; Transmembrane helix;
KW   Transport.
FT   CHAIN           1..513
FT                   /note="Cytochrome c oxidase subunit 1"
FT                   /id="PRO_0000183310"
FT   TRANSMEM        16..36
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        62..82
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        101..121
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        144..164
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        182..202
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        233..253
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        267..287
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        304..324
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        337..357
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        384..404
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        413..433
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        451..471
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   BINDING         39
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         44
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         60
FT                   /ligand="Fe(II)-heme a"
FT                   /ligand_id="ChEBI:CHEBI:61715"
FT                   /ligand_note="low-spin"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         239
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         243
FT                   /ligand="O2"
FT                   /ligand_id="ChEBI:CHEBI:15379"
FT                   /evidence="ECO:0000250|UniProtKB:P00396"
FT   BINDING         289
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         290
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         367
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="ligand shared with subunit 2"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         368
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="ligand shared with subunit 2"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         375
FT                   /ligand="heme a3"
FT                   /ligand_id="ChEBI:CHEBI:83282"
FT                   /ligand_note="high-spin"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         377
FT                   /ligand="Fe(II)-heme a"
FT                   /ligand_id="ChEBI:CHEBI:61715"
FT                   /ligand_note="low-spin"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   CROSSLNK        239..243
FT                   /note="1'-histidyl-3'-tyrosine (His-Tyr)"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
SQ   SEQUENCE   513 AA;  57033 MW;  EE6CE6916D9399A8 CRC64;
     MMRKWLYSTN HKDIGTLYFM FGIWAGMVGT SLSLLIRAEL GNPGSLIGDD QIYNTIVTAH
     AFIMIFFMVM PIMIGGFGNW LVPLMLGAPD MAFPRMNNMS FWLLPPSIML LISSSIVENG
     AGTGWTVYPP LSSNIAHSGS SVDLAIFSLH LAGISSILGA VNFITTIINM RPNNMSLDQM
     PLFVWSVGIT ALLLLLSLPV LAGAITMLLT DRNLNTSFFD PAGGGDPILY QHLFWFFGHP
     EVYILILPGF GMISHIISQE SGKKETFGCL GMIYAMMAIG LLGFVVWAHH MFTVGMDIDT
     RAYFTSATMI IAVPTGIKIF SWLATLHGTQ INYSPSMLWS LGFVFLFTVG GLTGVILANS
     SIDVTLHDTY YVVAHFHYVL SMGAVFAIMG GFVHWYPLFT GLALNPYLLK IQFFTMFIGV
     NLTFFPQHFL GLAGMPRRYS DYPDTYTSWN IISSLGSYIS LVATMLMLMI IWESLINKRI
     ILFPLNMNSS IEWYQNLPPA EHSYNELPIL SNF
//