COX1_ARATH
ID COX1_ARATH Reviewed; 527 AA.
AC P60620; Q07063;
DT 15-MAR-2004, integrated into UniProtKB/Swiss-Prot.
DT 15-MAR-2004, sequence version 1.
DT 03-AUG-2022, entry version 120.
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; OrderedLocusNames=AtMg01360;
OS Arabidopsis thaliana (Mouse-ear cress).
OG Mitochondrion.
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC rosids; malvids; Brassicales; Brassicaceae; Camelineae; Arabidopsis.
OX NCBI_TaxID=3702;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=cv. C24;
RX PubMed=8988169; DOI=10.1038/ng0197-57;
RA Unseld M., Marienfeld J.R., Brandt P., Brennicke A.;
RT "The mitochondrial genome of Arabidopsis thaliana contains 57 genes in
RT 366,924 nucleotides.";
RL Nat. Genet. 15:57-61(1997).
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; Y08501; CAA69785.1; -; Genomic_DNA.
DR RefSeq; NP_085587.1; NC_001284.2.
DR AlphaFoldDB; P60620; -.
DR SMR; P60620; -.
DR STRING; 3702.ATMG01360.1; -.
DR PaxDb; P60620; -.
DR PRIDE; P60620; -.
DR EnsemblPlants; ATMG01360.1; ATMG01360.1; ATMG01360.
DR Gramene; ATMG01360.1; ATMG01360.1; ATMG01360.
DR Araport; ATMG01360; -.
DR TAIR; locus:504954619; ATMG01360.
DR eggNOG; KOG4769; Eukaryota.
DR HOGENOM; CLU_011899_7_3_1; -.
DR InParanoid; P60620; -.
DR OMA; WAMMSIG; -.
DR OrthoDB; 728231at2759; -.
DR BioCyc; ARA:ATMG01360-MON; -.
DR BioCyc; MetaCyc:ATMG01360-MON; -.
DR UniPathway; UPA00705; -.
DR PRO; PR:P60620; -.
DR Proteomes; UP000006548; Mitochondrion (cv. C24).
DR ExpressionAtlas; P60620; baseline and differential.
DR Genevisible; P60620; AT.
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 InterPro; IPR014241; Cyt_c_oxidase_su1_bac.
DR PANTHER; PTHR10422; PTHR10422; 1.
DR Pfam; PF00115; COX1; 1.
DR PRINTS; PR01165; CYCOXIDASEI.
DR SUPFAM; SSF81442; SSF81442; 1.
DR TIGRFAMs; TIGR02891; CtaD_CoxA; 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..527
FT /note="Cytochrome c oxidase subunit 1"
FT /id="PRO_0000183286"
FT TRANSMEM 18..38
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 66..86
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 103..123
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 148..168
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 186..206
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 237..257
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 340..360
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 379..399
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 414..434
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 458..478
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; 57996 MW; 69509955882FDE9E CRC64;
MKNLVRWLFS TNHKDIGTLY FIFGAIAGVM GTCFSVLIRM ELARPGDQIL GGNHQLYNVL
ITAHAFLMIF FMVMPAMIGG FGNWFVPILI GAPDMAFPRL NNISFWLLPP SLLLLLSSAL
VEVGSGTGWT VYPPLSGITS HSGGAVDLAI FSLHLSGVSS ILGSINFITT IFNMRGPGMT
MHRLPLFVWS VLVTAFLLLL SLPVLAGAIT MLLTDRNFNT TFFDPAGGGD PILYQHLFWF
FGHPEVYILI LPGFGIISHI VSTFSGKPVF GYLGMVYAMI SIGVLGFLVW AHHMFTVGLD
VDTRAYFTAA TMIIAVPTGI KIFSWIATMW GGSIQYKTPM LFAVGFIFLF TIGGLTGIVL
ANSGLDIALH DTYYVVAHFH YVLSMGAVFA LFAGFYYWVG KIFGRTYPET LGQIHFWITF
FGVNLTFFPM HFLGLSGMPR RIPDYPDAYA GWNALSSFGS YISVVGICCF FVVVTITLSS
GNNKRCAPSP WALELNSTTL EWMVQSPPAF HTFGELPAIK ETKSYVK
