ID COX3_BRALA Reviewed; 262 AA. AC P69215; O47425; DT 15-FEB-2005, integrated into UniProtKB/Swiss-Prot. DT 15-FEB-2005, sequence version 1. DT 11-DEC-2019, entry version 66. DE RecName: Full=Cytochrome c oxidase subunit 3; DE EC=1.9.3.1; DE AltName: Full=Cytochrome c oxidase polypeptide III; GN Name=COIII; OS Branchiostoma lanceolatum (Common lancelet) (Amphioxus lanceolatum). OG Mitochondrion. OC Eukaryota; Metazoa; Chordata; Cephalochordata; Branchiostomidae; OC Branchiostoma. OX NCBI_TaxID=7740; RN [1] RP NUCLEOTIDE SEQUENCE [GENOMIC DNA]. RX PubMed=9628930; DOI=10.1093/nar/26.13.3279; RA Spruyt N., Delarbre C., Gachelin G., Laudet V.; RT "Complete sequence of the amphioxus (Branchiostoma lanceolatum) RT mitochondrial genome: relations to vertebrates."; RL Nucleic Acids Res. 26:3279-3285(1998). CC -!- FUNCTION: Subunits I, II and III form the functional core of the enzyme CC complex. CC -!- CATALYTIC ACTIVITY: CC Reaction=4 [Fe(II)cytochrome c] + 4 H(+) + O2 = 4 [Fe(III)cytochrome c] CC + 2 H2O; Xref=Rhea:RHEA:11436, Rhea:RHEA-COMP:10350, Rhea:RHEA- CC COMP:14399, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:15379, CC ChEBI:CHEBI:29033, ChEBI:CHEBI:29034; EC=1.9.3.1; CC -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane {ECO:0000250}; CC Multi-pass membrane protein {ECO:0000250}. CC -!- SIMILARITY: Belongs to the cytochrome c oxidase subunit 3 family. CC {ECO:0000305}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; Y16474; CAA76253.1; -; Genomic_DNA. DR PIR; H71390; H71390. DR RefSeq; NP_007543.1; NC_001912.1. DR SMR; P69215; -. DR GeneID; 808215; -. 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; Oxidoreductase; KW Transmembrane; Transmembrane helix. FT CHAIN 1..262 FT /note="Cytochrome c oxidase subunit 3" FT /id="PRO_0000183748" FT TRANSMEM 11..31 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 32..52 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 83..103 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 125..147 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 160..180 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 198..218 FT /note="Helical" FT /evidence="ECO:0000255" FT TRANSMEM 240..260 FT /note="Helical" FT /evidence="ECO:0000255" SQ SEQUENCE 262 AA; 29711 MW; 6D93D8338AC870D8 CRC64; MTGYQPHPWH LVEPSPWPLV GGSAAFTLTV GLVMWFHYNS ISLMILGLVM IVATMIQWWR DVIREATFQG CHTSYVLSGL RRGMVLFIVS EVFFFLAFFW AFFHSSLAPT VELGVTWPPV GVHPLNAFAV PLLNTAVLLS SGVTVTWAHH ALMEGKRTEA IQSLAITVML GLYFTGLQAW EYYEAPFTIA DSVYGSTFFV ATGFHGLHVI IGSTFLMVCL GRQVFYHYTS SHHFGFEAAA WYWHFVDVVW LFLYVCIYWW GS //