ID   A0A075QND0_LINLC        Unreviewed;       219 AA.
AC   A0A075QND0;
DT   29-OCT-2014, integrated into UniProtKB/TrEMBL.
DT   29-OCT-2014, sequence version 1.
DT   29-MAY-2024, entry version 31.
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:AIG20163.1};
OS   Lineus lacteus (Ribbon worm) (Ramphogordius lacteus).
OG   Mitochondrion {ECO:0000313|EMBL:AIG20163.1}.
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Nemertea; Pilidiophora;
OC   Heteronemertea; Lineidae; Lineus.
OX   NCBI_TaxID=947578 {ECO:0000313|EMBL:AIG20163.1};
RN   [1] {ECO:0000313|EMBL:AIG20163.1}
RP   NUCLEOTIDE SEQUENCE.
RC   STRAIN=SK67 {ECO:0000313|EMBL:AIG20163.1};
RA   Kvist S., Laumer C.E., Junoy J., Giribet G.;
RT   "New insights into the phylogeny, systematics and DNA barcoding of
RT   Nemertea.";
RL   Invertebr. Syst. 28:287-308(2014).
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}.
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DR   EMBL; KF935519; AIG20163.1; -; Genomic_DNA.
DR   AlphaFoldDB; A0A075QND0; -.
DR   UniPathway; UPA00705; -.
DR   GO; GO:0005751; C:mitochondrial respiratory chain complex IV; IEA:TreeGrafter.
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:0015990; P:electron transport coupled proton transport; IEA:TreeGrafter.
DR   GO; GO:0006123; P:mitochondrial electron transport, cytochrome c to oxygen; IEA:TreeGrafter.
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:AIG20163.1};
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        47..67
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        88..110
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        130..155
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        167..194
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   DOMAIN          1..219
FT                   /note="Cytochrome oxidase subunit I profile"
FT                   /evidence="ECO:0000259|PROSITE:PS50855"
FT   NON_TER         1
FT                   /evidence="ECO:0000313|EMBL:AIG20163.1"
FT   NON_TER         219
FT                   /evidence="ECO:0000313|EMBL:AIG20163.1"
SQ   SEQUENCE   219 AA;  23508 MW;  4DF0274A958E3660 CRC64;
     TLYFLFGIWS GLVGTGLSML IRAELGQPGA LLGDDHLYNV IVTAHAFVMI FFLVMPVMIG
     GFGNWLVPLM LGAPDMAFPR MNNMSFWLLP PALTLLLGSA AVEGGAGTGW TVYPPLSGNV
     AHAGGSVDLA IFSLHLAGVS SILGAINFIT TVVNMRWRGL QFERLPLFVW SVKITAILLL
     LSLPVLAGAI TMLLTDRNFN TSFFDPAGGG DPILYQHLF
//