COX1_MYTED
ID COX1_MYTED Reviewed; 551 AA.
AC P41774; Q68SR1;
DT 01-NOV-1995, integrated into UniProtKB/Swiss-Prot.
DT 01-MAR-2005, sequence version 2.
DT 03-AUG-2022, entry version 101.
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 Mytilus edulis (Blue mussel).
OG Mitochondrion.
OC Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Bivalvia;
OC Autobranchia; Pteriomorphia; Mytilida; Mytiloidea; Mytilidae; Mytilinae;
OC Mytilus.
OX NCBI_TaxID=6550;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=15014161; DOI=10.1093/molbev/msh090;
RA Boore J.L., Medina M., Rosenberg L.A.;
RT "Complete sequences of the highly rearranged molluscan mitochondrial
RT genomes of the scaphopod Graptacme eborea and the bivalve Mytilus edulis.";
RL Mol. Biol. Evol. 21:1492-1503(2004).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-39.
RX PubMed=1386586; DOI=10.1093/genetics/131.2.397;
RA Hoffmann R.J., Boore J.L., Brown W.M.;
RT "A novel mitochondrial genome organization for the blue mussel, Mytilus
RT edulis.";
RL Genetics 131:397-412(1992).
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; AY484747; AAT98405.1; -; Genomic_DNA.
DR PIR; S28757; S28757.
DR RefSeq; YP_073343.1; NC_006161.1.
DR AlphaFoldDB; P41774; -.
DR SMR; P41774; -.
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; 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 Respiratory chain; Translocase; Transmembrane; Transmembrane helix;
KW Transport.
FT CHAIN 1..551
FT /note="Cytochrome c oxidase subunit 1"
FT /id="PRO_0000183364"
FT TRANSMEM 34..54
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 81..101
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 126..146
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 163..183
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 209..229
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 252..272
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 285..305
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 326..346
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 356..376
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 391..411
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 432..452
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 475..495
FT /note="Helical"
FT /evidence="ECO:0000255"
FT BINDING 62
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000250|UniProtKB:P00401"
FT BINDING 79
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 258
FT /ligand="Cu cation"
FT /ligand_id="ChEBI:CHEBI:23378"
FT /ligand_label="B"
FT /evidence="ECO:0000250|UniProtKB:P00401"
FT BINDING 262
FT /ligand="O2"
FT /ligand_id="ChEBI:CHEBI:15379"
FT /evidence="ECO:0000250|UniProtKB:P00396"
FT BINDING 308
FT /ligand="Cu cation"
FT /ligand_id="ChEBI:CHEBI:23378"
FT /ligand_label="B"
FT /evidence="ECO:0000250|UniProtKB:P00401"
FT BINDING 309
FT /ligand="Cu cation"
FT /ligand_id="ChEBI:CHEBI:23378"
FT /ligand_label="B"
FT /evidence="ECO:0000250|UniProtKB:P00401"
FT BINDING 386
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 387
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 394
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 396
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 258..262
FT /note="1'-histidyl-3'-tyrosine (His-Tyr)"
FT /evidence="ECO:0000250|UniProtKB:P00401"
SQ SEQUENCE 551 AA; 61644 MW; E1D49E4CD4FC13C0 CRC64;
MMKMLKKEEM GGYGEVESWW RRWLWSTNHK DIGTLYLYSG VWGGLFGASL SLMIRMQLGH
PGAVFLKSDW FYNVVVTTHA LMMIFFAVMP ILIEAFGNWL IPLLVGGKDM IYPRMNNLSY
WLSPNALYLL MLSFSTDKGV GAGWTIYPPL SVYPYHSGPS MDVLIVSLHL AGLSSLVGAI
NFASTNKNMP VLEMKGERAE LYVLSISVTA VLLIISIPVL GGGITMILFD RNFNTTFFDP
AGGGDPVLFQ HLFWFFGHPE VYILILPAFG VMSKVIMHCS GKEAVFGLIG MVYAMIGIGG
LGCMVWAHHM FTVGLNVDTR GYFSTATMVI AVPTGVKVFS WLATMAGSKF KMKPAAYWST
GFLFLFTVGG LTGVLLSSAS MDVSLHDTYY VVAHFHYVLS MGAVFGVFCG LNHWLPNFVG
VCFNKKWSKA HFMAMFFGVN TTFFPQHFLG LSGMPRRYMD YADIYAHWHW VSSYGSAVSF
GSLMYFKFLL WEALVSQRGV VFSGGLCGEM DWAGTRDLYP GSKHVYSQLP FVWTNPYNTC
ITYIYKKSRN Q
