COX3_LOCMI
ID COX3_LOCMI Reviewed; 263 AA.
AC P14574;
DT 01-JAN-1990, integrated into UniProtKB/Swiss-Prot.
DT 01-JAN-1990, sequence version 1.
DT 25-MAY-2022, entry version 108.
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 Locusta migratoria (Migratory locust).
OG Mitochondrion.
OC Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Hexapoda; Insecta; Pterygota;
OC Neoptera; Polyneoptera; Orthoptera; Caelifera; Acrididea; Acridomorpha;
OC Acridoidea; Acrididae; Oedipodinae; Locusta.
OX NCBI_TaxID=7004;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=2852067; DOI=10.1007/bf00521271;
RA Haucke H.R., Gellissen G.;
RT "Different mitochondrial gene orders among insects: exchanged tRNA gene
RT positions in the COII/COIII region between an orthopteran and a dipteran
RT species.";
RL Curr. Genet. 14:471-476(1988).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX PubMed=8587138; DOI=10.1007/bf00173173;
RA Flook P.K., Rowell C.H.F., Gellissen G.;
RT "The sequence, organization, and evolution of the Locusta migratoria
RT mitochondrial genome.";
RL J. Mol. Evol. 41:928-941(1995).
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; X13975; CAA32156.1; -; Genomic_DNA.
DR EMBL; X80245; CAA56529.1; -; Genomic_DNA.
DR PIR; T11469; T11469.
DR RefSeq; NP_007295.1; NC_001712.1.
DR AlphaFoldDB; P14574; -.
DR SMR; P14574; -.
DR GeneID; 807961; -.
DR CTD; 4514; -.
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 CDD; cd01665; Cyt_c_Oxidase_III; 1.
DR Gene3D; 1.20.120.80; -; 1.
DR InterPro; IPR024791; Cyt_c/ubiquinol_Oxase_su3.
DR InterPro; IPR033945; Cyt_c_oxase_su3_dom.
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_0000183800"
FT TRANSMEM 9..29
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 40..60
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 84..104
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 129..149
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 161..181
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 198..218
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 241..261
FT /note="Helical"
FT /evidence="ECO:0000255"
SQ SEQUENCE 263 AA; 30353 MW; C5ED6EDB148B37BD CRC64;
MLTNNNNHPF HMVDYSPWPL TGAIGAMILT SGMTKWFHTF NMNLLMIGMT VIVLTMIQWW
RDVVREGTFQ GLHTKLVSKG LRWGMILFIA SEVLFFASFF WAFFNSSLAP TIELGMKWPP
MGIQPFNPIQ IPLLNTAILL ASGVTITWAH HSIMECNHSQ ALQGLFFTVM LGFYFTLLQM
YEYWEAPFTI ADAVYGSTFF VATGFHGLHV IIGTTFLLTC LIRHMMNQFS SNHHFGFEAA
AWYWHFVDVV WLFLYLSIYW WGS
