ID A0A4L6_9CAEN Unreviewed; 199 AA. AC A0A4L6; DT 14-NOV-2006, integrated into UniProtKB/TrEMBL. DT 14-NOV-2006, sequence version 1. DT 27-MAR-2024, entry version 71. DE RecName: Full=Cytochrome c oxidase subunit 1 {ECO:0000256|ARBA:ARBA00015947, ECO:0000256|RuleBase:RU000369}; DE EC=7.1.1.9 {ECO:0000256|RuleBase:RU000369}; DE Flags: Fragment; GN Name=COI {ECO:0000313|EMBL:ABJ90456.1}; OS Tritia pellucida. OG Mitochondrion {ECO:0000313|EMBL:ABJ90456.1}. OC Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Gastropoda; OC Caenogastropoda; Neogastropoda; Buccinoidea; Nassariidae; Nassariinae; OC Tritia. OX NCBI_TaxID=1934735 {ECO:0000313|EMBL:ABJ90456.1}; RN [1] {ECO:0000313|EMBL:ABJ90456.1} RP NUCLEOTIDE SEQUENCE. RA Simon-Bouhet B., Garcia P., Viard F.; RT "The genus Cyclope: a mitochondrial marker to discriminate two species."; RL Submitted (SEP-2006) to the EMBL/GenBank/DDBJ databases. 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:0000256|RuleBase:RU000369}. 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:0000256|RuleBase:RU000369}; CC -!- COFACTOR: CC Name=heme; Xref=ChEBI:CHEBI:30413; CC Evidence={ECO:0000256|ARBA:ARBA00001971}; CC -!- PATHWAY: Energy metabolism; oxidative phosphorylation. CC {ECO:0000256|ARBA:ARBA00004673, ECO:0000256|RuleBase:RU000369}. CC -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane CC {ECO:0000256|RuleBase:RU000369}; Multi-pass membrane protein CC {ECO:0000256|RuleBase:RU000369}. CC -!- SIMILARITY: Belongs to the heme-copper respiratory oxidase family. CC {ECO:0000256|ARBA:ARBA00009578, ECO:0000256|RuleBase:RU000369}. 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; DQ991048; ABJ90456.1; -; Genomic_DNA. DR AlphaFoldDB; A0A4L6; -. DR UniPathway; UPA00705; -. DR GO; GO:0005743; C:mitochondrial inner membrane; IEA:UniProtKB-SubCell. DR GO; GO:0070469; C:respirasome; IEA:UniProtKB-KW. 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:0006119; P:oxidative phosphorylation; IEA:UniProtKB-UniPathway. DR Gene3D; 1.20.210.10; Cytochrome c oxidase-like, subunit I domain; 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 PANTHER; PTHR10422; CYTOCHROME C OXIDASE SUBUNIT 1; 1. DR PANTHER; PTHR10422:SF18; CYTOCHROME C OXIDASE SUBUNIT 1; 1. DR Pfam; PF00115; COX1; 1. DR PRINTS; PR01165; CYCOXIDASEI. DR SUPFAM; SSF81442; Cytochrome c oxidase subunit I-like; 1. DR PROSITE; PS50855; COX1; 1. PE 3: Inferred from homology; KW Copper {ECO:0000256|RuleBase:RU000369}; KW Electron transport {ECO:0000256|RuleBase:RU000369}; KW Heme {ECO:0000256|RuleBase:RU000369}; Iron {ECO:0000256|RuleBase:RU000369}; KW Membrane {ECO:0000256|RuleBase:RU000369, ECO:0000256|SAM:Phobius}; KW Metal-binding {ECO:0000256|RuleBase:RU000369}; KW Mitochondrion {ECO:0000256|RuleBase:RU000369, ECO:0000313|EMBL:ABJ90456.1}; KW Mitochondrion inner membrane {ECO:0000256|RuleBase:RU000369}; KW Respiratory chain {ECO:0000256|RuleBase:RU000369}; KW Transmembrane {ECO:0000256|RuleBase:RU000369, ECO:0000256|SAM:Phobius}; KW Transmembrane helix {ECO:0000256|SAM:Phobius}; KW Transport {ECO:0000256|RuleBase:RU000369}. FT TRANSMEM 32..57 FT /note="Helical" FT /evidence="ECO:0000256|SAM:Phobius" FT TRANSMEM 78..100 FT /note="Helical" FT /evidence="ECO:0000256|SAM:Phobius" FT TRANSMEM 120..145 FT /note="Helical" FT /evidence="ECO:0000256|SAM:Phobius" FT TRANSMEM 157..184 FT /note="Helical" FT /evidence="ECO:0000256|SAM:Phobius" FT DOMAIN 1..199 FT /note="Cytochrome oxidase subunit I profile" FT /evidence="ECO:0000259|PROSITE:PS50855" FT NON_TER 1 FT /evidence="ECO:0000313|EMBL:ABJ90456.1" FT NON_TER 199 FT /evidence="ECO:0000313|EMBL:ABJ90456.1" SQ SEQUENCE 199 AA; 21198 MW; F27E526DD4EE5208 CRC64; GLVGTALSLL IRAELGQPGA LLGDDQLYNV IVTAHAFVMI FFLVMPMMIG GFGNWLVPLM LGAPDMAFPR LNNMSFWLLP PALLLLLSSA AVESGAGTGW TVYPPLSANL AHAGGSVDLA IFSLHLAGVS SILGAVNFIT TIVNMRWRGM QFERLPLFVW SVKITAILLL LSLPVLAGAI TMLLTDRNFN TAFFDPAGG //