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COX1_PEA
ID   COX1_PEA                Reviewed;         527 AA.
AC   P12786;
DT   01-OCT-1989, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1995, sequence version 2.
DT   03-AUG-2022, entry version 117.
DE   RecName: Full=Cytochrome c oxidase subunit 1;
DE            EC=7.1.1.9;
DE   AltName: Full=Cytochrome c oxidase polypeptide I;
GN   Name=COX1; Synonyms=COXI;
OS   Pisum sativum (Garden pea).
OG   Mitochondrion.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Fabales; Fabaceae; Papilionoideae; 50 kb inversion clade;
OC   NPAAA clade; Hologalegina; IRL clade; Fabeae; Pisum.
OX   NCBI_TaxID=3888;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=2562779; DOI=10.1007/bf00027340;
RA   Kemmerer E.C., Kao T., Deng G., Wu R.;
RT   "Isolation and nucleotide sequence of the pea cytochrome oxidase subunit I
RT   gene.";
RL   Plant Mol. Biol. 13:121-124(1989).
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; X14409; CAA32581.1; -; Genomic_DNA.
DR   PIR; S05290; S05290.
DR   AlphaFoldDB; P12786; -.
DR   SMR; P12786; -.
DR   EnsemblPlants; Psat0s12108g0080.1; Psat0s12108g0080.1.cds1; Psat0s12108g0080.
DR   EnsemblPlants; Psat3g040160.1; Psat3g040160.1.cds; Psat3g040160.
DR   Gramene; Psat0s12108g0080.1; Psat0s12108g0080.1.cds1; Psat0s12108g0080.
DR   Gramene; Psat3g040160.1; Psat3g040160.1.cds; Psat3g040160.
DR   UniPathway; UPA00705; -.
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: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; -; 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; IPR033944; Cyt_c_oxase_su1_dom.
DR   PANTHER; PTHR10422; PTHR10422; 1.
DR   Pfam; PF00115; COX1; 1.
DR   PRINTS; PR01165; CYCOXIDASEI.
DR   SUPFAM; SSF81442; SSF81442; 1.
DR   PROSITE; PS50855; COX1; 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..527
FT                   /note="Cytochrome c oxidase subunit 1"
FT                   /id="PRO_0000183384"
FT   TRANSMEM        18..38
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        59..79
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        103..123
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        149..169
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        193..213
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        246..266
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        269..289
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        312..332
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        339..359
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        375..395
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        414..434
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        447..467
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   BINDING         41
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         46
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         64
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         243
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         247
FT                   /ligand="O2"
FT                   /ligand_id="ChEBI:CHEBI:15379"
FT                   /evidence="ECO:0000250|UniProtKB:P00396"
FT   BINDING         292
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         293
FT                   /ligand="Cu cation"
FT                   /ligand_id="ChEBI:CHEBI:23378"
FT                   /ligand_label="B"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   BINDING         370
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         371
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         378
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         380
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         443
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
FT   CROSSLNK        243..247
FT                   /note="1'-histidyl-3'-tyrosine (His-Tyr)"
FT                   /evidence="ECO:0000250|UniProtKB:P00401"
SQ   SEQUENCE   527 AA;  57509 MW;  B904E54385836CDE CRC64;
     MTNPVRWLFS TNHKDIGTLY FIFGAIAGVM GTCFSVLIRM ELARPGDQIL GGNHQLYNVL
     ITAHAFFMIF FMVMPAMIGG SGNWSVPILI GAPDMAFPRL NNISFWLLPP SLLLLLSSAL
     VEVGSGTGWT VYPPLSGITS HSGGAVDSAI SSLHLSGVSS ILGSINFLTT ISNMRGPGMT
     MHRSPLFVWS VPVTAFPLLL SLPVLAGAIT MLLTDRNFNT TFSDPAGGGD PILYQHLFRF
     FGHPEVYIPI LPGSGIISHI VSTFSGKPVF GYLGMVYAMI SIGVLGFLVW AHHMFTVGLD
     VDTRAYFTAA TMIIAVPTGI KIFSWIATMW GGSIQYKTPM LFAVGFIFLF TIGGLTGIVP
     ANSGLDIALH DTYYVVAHFH YVLSMGAVFA LFAGFHYWVG KIFGRTYPET LGKIHFWITF
     FGVNLTLFPM HFLGLSGMPR RIPDYPDAYA GWNALSSFGS YISVVGIRRF FVVVTITSSS
     GNNITRANIP WAVEQNSTTL EWLVQSPPAF HTFGELPAIK ETKSYVK
 
 
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