COX1_STRPU
ID COX1_STRPU Reviewed; 517 AA.
AC P15544;
DT 01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT 01-APR-1990, sequence version 1.
DT 03-AUG-2022, entry version 130.
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 Strongylocentrotus purpuratus (Purple sea urchin).
OG Mitochondrion.
OC Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Echinozoa; Echinoidea;
OC Euechinoidea; Echinacea; Camarodonta; Echinidea; Strongylocentrotidae;
OC Strongylocentrotus.
OX NCBI_TaxID=7668;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC TISSUE=Egg;
RX PubMed=3172215; DOI=10.1016/0022-2836(88)90452-4;
RA Jacobs H.T., Elliott D.J., Math V.B., Farquharson A.;
RT "Nucleotide sequence and gene organization of sea urchin mitochondrial
RT DNA.";
RL J. Mol. Biol. 202:185-217(1988).
RN [2]
RP ERRATUM OF PUBMED:3172215, AND SEQUENCE REVISION TO 61-62.
RA Jacobs H.T., Elliott D.J., Math V.B., Farquharson A.;
RL J. Mol. Biol. 211:663-663(1990).
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; X12631; CAA31153.1; -; Genomic_DNA.
DR PIR; S01501; S01501.
DR RefSeq; NP_006967.1; NC_001453.1.
DR AlphaFoldDB; P15544; -.
DR SMR; P15544; -.
DR EnsemblMetazoa; GeneID_2652718_df_mr; NP_006967; GeneID_2652718.
DR GeneID; 2652718; -.
DR KEGG; spu:2652718; -.
DR CTD; 4512; -.
DR InParanoid; P15544; -.
DR OMA; WAMMSIG; -.
DR OrthoDB; 728231at2759; -.
DR PhylomeDB; P15544; -.
DR UniPathway; UPA00705; -.
DR Proteomes; UP000007110; Unassembled WGS sequence.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0005751; C:mitochondrial respiratory chain complex IV; IBA:GO_Central.
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:0009060; P:aerobic respiration; IBA:GO_Central.
DR GO; GO:0015990; P:electron transport coupled proton transport; IBA:GO_Central.
DR GO; GO:0006123; P:mitochondrial electron transport, cytochrome c to oxygen; IBA:GO_Central.
DR GO; GO:0022904; P:respiratory electron transport chain; IBA:GO_Central.
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; IPR023615; Cyt_c_Oxase_su1_BS.
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.
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 Reference proteome; Respiratory chain; Translocase; Transmembrane;
KW Transmembrane helix; Transport.
FT CHAIN 1..517
FT /note="Cytochrome c oxidase subunit 1"
FT /id="PRO_0000183423"
FT TRANSMEM 17..37
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 63..83
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 102..122
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 145..165
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 183..203
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 234..254
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 268..288
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 305..325
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 338..358
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 380..400
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 414..434
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 456..476
FT /note="Helical"
FT /evidence="ECO:0000255"
FT BINDING 40
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250|UniProtKB:P00401"
FT BINDING 45
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250|UniProtKB:P00401"
FT BINDING 61
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 240
FT /ligand="Cu cation"
FT /ligand_id="ChEBI:CHEBI:23378"
FT /ligand_label="B"
FT /evidence="ECO:0000250|UniProtKB:P00401"
FT BINDING 244
FT /ligand="O2"
FT /ligand_id="ChEBI:CHEBI:15379"
FT /evidence="ECO:0000250|UniProtKB:P00396"
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 291
FT /ligand="Cu cation"
FT /ligand_id="ChEBI:CHEBI:23378"
FT /ligand_label="B"
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 369
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 376
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 378
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 240..244
FT /note="1'-histidyl-3'-tyrosine (His-Tyr)"
FT /evidence="ECO:0000250|UniProtKB:P00401"
SQ SEQUENCE 517 AA; 57306 MW; A3FBC0A23C9042FE CRC64;
MQLSRWLFST NHKDIGTLYL IFGAWAGMVG TAMSVIIRAE LAQPGSLLND DQIYNVVVTA
HALVMIFFMV MPIMIGGFGN WLIPLMIGAP DMAFPRMNNM SFWLIPPSFI LLLASAGVEN
GAGTGWTIYP PLSSNITHAG SSVDLAIFSL HLAGASSILG LINFITTIIN MRTPGMSLDR
LPLFVWSVFV TAFLLLLSLP VLAGAITMLL TDRNINTTFF DPAGGGDPIL FQHLFWLFGH
PEVYILILPG FGMISHVIAH YSGKREPFGY LGLVYAMIAI GVLGFLVWAH HMFTVGMDVD
TRAYFTAATM IIAVPTGLKV FSWMAKLQGS NLQWSLPLLW TLGIVFLFTL GGLTGIVLAN
SSIDFVLHDT YYVVAHFHYV LSMGAVFAIF AGFTHWFPLF SGYSLHPLWG KVHFFIMFVG
VNLTFFPQHF LGLAGMPRRY SDYPDAYTLW NTISSIGSTI SVVAMLFFLF LIWEAFASQR
EGITPEFSHA SLEWQYTSFP PSHHTFDETP STIIIVK
