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COX3_THEPA
ID   COX3_THEPA              Reviewed;         255 AA.
AC   Q36098;
DT   18-APR-2006, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 91.
DE   RecName: Full=Cytochrome c oxidase subunit 3;
DE            EC=7.1.1.9;
DE   AltName: Full=Cytochrome c oxidase polypeptide III;
GN   Name=MT-CO3; Synonyms=COIII, COXIII, MTCO3;
OS   Theileria parva (East coast fever infection agent).
OG   Mitochondrion.
OC   Eukaryota; Sar; Alveolata; Apicomplexa; Aconoidasida; Piroplasmida;
OC   Theileriidae; Theileria.
OX   NCBI_TaxID=5875;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Muguga;
RX   PubMed=8112303; DOI=10.1002/j.1460-2075.1994.tb06333.x;
RA   Kairo A., Fairlamb A., Gobright E., Nene V.;
RT   "A 7.1 kb linear DNA molecule of Theileria parva has scrambled rDNA
RT   sequences and open reading frames for mitochondrially-encoded proteins.";
RL   EMBO J. 13:898-905(1994).
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; Z23263; CAA80799.1; -; Genomic_DNA.
DR   PIR; S41690; S41690.
DR   RefSeq; YP_001994286.1; NC_011005.1.
DR   AlphaFoldDB; Q36098; -.
DR   SMR; Q36098; -.
DR   GeneID; 6741537; -.
DR   InParanoid; Q36098; -.
DR   Proteomes; UP000001949; Mitochondrion.
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; Reference proteome;
KW   Translocase; Transmembrane; Transmembrane helix.
FT   CHAIN           1..255
FT                   /note="Cytochrome c oxidase subunit 3"
FT                   /id="PRO_0000232683"
FT   TRANSMEM        12..32
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        42..62
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        91..111
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        128..148
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        155..175
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        196..216
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        234..254
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   255 AA;  29891 MW;  A3FF61D44AA28844 CRC64;
     MRNSAQSYLK YINIINIFET LYLFYSTGLD TLEYIDSTYK NFIIMYVNQY LLYGTTLKYL
     SVGEFFMNSL TIFINSIREI MTSTTMVMYA IFGMFIFSEI LVFSTFIWGY FHLRLSNPIL
     LAELNVEAYL QISDVLNTGS ILVSIILHRV QESANFETDF FMEQLLLIGF IFLSLQNDEY
     SLILSYVNNY WMTLYFFILT GLHSLHVCAG GIFVLIQSYF YEGDGSQRDE EFNAGVYWHF
     VEMIWIALTM LLFLA
 
 
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