ID   COX3_PLAVI              Reviewed;         263 AA.
AC   Q36675;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 90.
DE   RecName: Full=Cytochrome c oxidase subunit 3;
DE            EC=7.1.1.9;
DE   AltName: Full=Cytochrome c oxidase polypeptide III;
GN   Name=COIII;
OS   Plasmodium vivax.
OG   Mitochondrion.
OC   Eukaryota; Sar; Alveolata; Apicomplexa; Aconoidasida; Haemosporida;
OC   Plasmodiidae; Plasmodium; Plasmodium (Plasmodium).
OX   NCBI_TaxID=5855;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Lim P.K.C., Kita K., Tan S.K., Furuta T., Kojima S., Aoki T., Watanabe Y.,
RA   Mak J.W.;
RT   "Cytochrome c oxidase III (COIII) gene of Plasmodium vivax: complete coding
RT   sequence and its expression in the erythhrocytic stages of the parasite.";
RL   Kisechugaku Zasshi 45:373-383(1996).
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:P00420}.
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:P00420};
CC       PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:11437;
CC         Evidence={ECO:0000250|UniProtKB:P00420};
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:P00420}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000250|UniProtKB:P00420}; Multi-pass membrane protein
CC       {ECO:0000250|UniProtKB:P00420}.
CC   -!- SIMILARITY: Belongs to the cytochrome c oxidase subunit 3 family.
CC       {ECO:0000305}.
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DR   EMBL; D82020; BAA11509.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q36675; -.
DR   SMR; Q36675; -.
DR   VEuPathDB; PlasmoDB:PVAD80_MIT0001; -.
DR   VEuPathDB; PlasmoDB:PVP01_MIT02700; -.
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:0004129; F:cytochrome-c oxidase activity; IEA:UniProtKB-EC.
DR   GO; GO:0019646; P:aerobic electron transport chain; IEA:InterPro.
DR   Gene3D; 1.20.120.80; -; 1.
DR   InterPro; IPR024791; Cyt_c/ubiquinol_Oxase_su3.
DR   InterPro; IPR000298; Cyt_c_oxidase-like_su3.
DR   InterPro; IPR035973; Cyt_c_oxidase_su3-like_sf.
DR   InterPro; IPR013833; Cyt_c_oxidase_su3_a-hlx.
DR   PANTHER; PTHR11403; PTHR11403; 1.
DR   Pfam; PF00510; COX3; 1.
DR   SUPFAM; SSF81452; SSF81452; 1.
DR   PROSITE; PS50253; COX3; 1.
PE   3: Inferred from homology;
KW   Membrane; Mitochondrion; Mitochondrion inner membrane; Translocase;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..263
FT                   /note="Cytochrome c oxidase subunit 3"
FT                   /id="PRO_0000183834"
FT   TRANSMEM        7..27
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        44..64
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        78..98
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        120..140
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        145..165
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        191..211
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        241..261
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   263 AA;  30281 MW;  76E26FAF697491CD CRC64;
     MLTAHKITVL INIFFIFSNY NNIKAHLVSY PSLTSLYGTS LKYFSVGILF TSNPIIFIIF
     VYSIRESFYS IFSSLVSGML SIIISEAILF ITYFWGILHF SLSPYPLYNE GIILTSSRML
     ILTITFILAS ASCMTACLQF LIEKGMSLEI SSIVFIIYLL GECFASLQTT EYLHLGYCIN
     DAISGTLFYC VTGLHFSHVI VGLLLLLIYF IRIVEMYDTN SEWSYSLYGI SYIVLPHTDQ
     ITILYWHFVE IVWLFIEYFF YSE