ID A0A0U2RXH9_9SAUR Unreviewed; 228 AA. AC A0A0U2RXH9; DT 16-MAR-2016, integrated into UniProtKB/TrEMBL. DT 16-MAR-2016, sequence version 1. DT 02-JUN-2021, entry version 23. DE RecName: Full=Cytochrome c oxidase subunit 2 {ECO:0000256|RuleBase:RU000457}; GN Name=COX2 {ECO:0000313|EMBL:ALP86020.1}; OS Lycodon flavozonatus (big-tooth snake). OG Mitochondrion {ECO:0000313|EMBL:ALP86020.1}. OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; OC Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera; OC Serpentes; Colubroidea; Colubridae; Colubrinae; Lycodon. OX NCBI_TaxID=1273574 {ECO:0000313|EMBL:ALP86020.1}; RN [1] {ECO:0000313|EMBL:ALP86020.1} RP NUCLEOTIDE SEQUENCE. RX PubMed=26195217; RA Ding M., Wu J., Qian L., Pan T., Zhang B.; RT "Complete mitochondrial genome of Lycodon flavozonatum and implications for RT Colubridae taxonomy."; RL Mitochondrial DNA 1-2:0-0(2015). 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:RU000457}. 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=7.1.1.9; CC Evidence={ECO:0000256|ARBA:ARBA00000049}; CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:11437; CC Evidence={ECO:0000256|ARBA:ARBA00000049}; CC -!- COFACTOR: CC Name=Cu cation; Xref=ChEBI:CHEBI:23378; CC Evidence={ECO:0000256|ARBA:ARBA00001935}; CC -!- COFACTOR: CC Name=Cu cation; Xref=ChEBI:CHEBI:23378; CC Evidence={ECO:0000256|RuleBase:RU000457}; CC Note=Binds a copper A center. {ECO:0000256|RuleBase:RU000457}; CC -!- SUBCELLULAR LOCATION: Membrane {ECO:0000256|ARBA:ARBA00004141}; Multi- CC pass membrane protein {ECO:0000256|ARBA:ARBA00004141}. Mitochondrion CC inner membrane {ECO:0000256|ARBA:ARBA00004448, CC ECO:0000256|RuleBase:RU000457}; Multi-pass membrane protein CC {ECO:0000256|ARBA:ARBA00004448, ECO:0000256|RuleBase:RU000457}. CC -!- SIMILARITY: Belongs to the cytochrome c oxidase subunit 2 family. CC {ECO:0000256|ARBA:ARBA00007866, ECO:0000256|RuleBase:RU000457}. 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; KR911720; ALP86020.1; -; Genomic_DNA. DR RefSeq; YP_009193030.1; NC_028730.1. DR GeneID; 26522127; -. DR CTD; 4513; -. 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:0070469; C:respirasome; IEA:UniProtKB-KW. DR GO; GO:0005507; F:copper ion binding; IEA:InterPro. DR GO; GO:0004129; F:cytochrome-c oxidase activity; IEA:UniProtKB-EC. DR CDD; cd13912; CcO_II_C; 1. DR Gene3D; 1.10.287.90; -; 1. DR Gene3D; 2.60.40.420; -; 1. DR InterPro; IPR002429; CcO_II-like_C. DR InterPro; IPR034210; CcO_II_C. DR InterPro; IPR001505; Copper_CuA. DR InterPro; IPR008972; Cupredoxin. DR InterPro; IPR011759; Cyt_c_oxidase_su2_TM_dom. DR InterPro; IPR036257; Cyt_c_oxidase_su2_TM_sf. DR Pfam; PF00116; COX2; 1. DR Pfam; PF02790; COX2_TM; 1. DR SUPFAM; SSF49503; SSF49503; 1. DR SUPFAM; SSF81464; SSF81464; 1. DR PROSITE; PS00078; COX2; 1. DR PROSITE; PS50857; COX2_CUA; 1. DR PROSITE; PS50999; COX2_TM; 1. PE 3: Inferred from homology; KW Copper {ECO:0000256|ARBA:ARBA00023008, ECO:0000256|RuleBase:RU000457}; KW Electron transport {ECO:0000256|ARBA:ARBA00022982, KW ECO:0000256|RuleBase:RU000457}; Magnesium {ECO:0000256|ARBA:ARBA00022842}; KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|RuleBase:RU000457}; KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, KW ECO:0000256|RuleBase:RU000457}; KW Mitochondrion {ECO:0000256|RuleBase:RU000457, ECO:0000313|EMBL:ALP86020.1}; KW Mitochondrion inner membrane {ECO:0000256|RuleBase:RU000457}; KW Respiratory chain {ECO:0000256|ARBA:ARBA00022660, KW ECO:0000256|RuleBase:RU000457}; KW Translocase {ECO:0000256|ARBA:ARBA00022967}; KW Transmembrane {ECO:0000256|ARBA:ARBA00022692, KW ECO:0000256|RuleBase:RU000457}; KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989, KW ECO:0000256|SAM:Phobius}; KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|RuleBase:RU000457}. FT TRANSMEM 21..44 FT /note="Helical" FT /evidence="ECO:0000256|SAM:Phobius" FT TRANSMEM 64..82 FT /note="Helical" FT /evidence="ECO:0000256|SAM:Phobius" FT DOMAIN 1..92 FT /note="COX2_TM" FT /evidence="ECO:0000259|PROSITE:PS50999" FT DOMAIN 93..226 FT /note="COX2_CUA" FT /evidence="ECO:0000259|PROSITE:PS50857" SQ SEQUENCE 228 AA; 25634 MW; D5BF615E90092936 CRC64; MPHAGQLSLQ EAMGPTMEEV IFLHDHVLLL TCLMTMVITM FTLTATTTAL THNDPTEEVE QLEAAWTVAP IMILILTALP SVRSLYLMEE VFNPYLTIKA TGHQWYWNYE YSDGVKTSFD SYMIQTKDLQ NGSPRLLEVD HRMIMPAGLQ TRIVVTAEDV LHSWTIPSLG VKVDAVPGRL NQLPLATSRV GVFYGQCSEI CGANHSFMPI AMEATPLHHF EQWLISEQ //