ID A0A1X9MKI3_9BACI Unreviewed; 341 AA.
AC A0A1X9MKI3;
DT 30-AUG-2017, integrated into UniProtKB/TrEMBL.
DT 30-AUG-2017, sequence version 1.
DT 24-JAN-2024, entry version 26.
DE RecName: Full=Cytochrome c oxidase subunit 2 {ECO:0000256|RuleBase:RU004024};
DE EC=7.1.1.9 {ECO:0000256|RuleBase:RU004024};
GN Name=ctaC {ECO:0000313|EMBL:ARK31142.1};
GN ORFNames=BkAM31D_15505 {ECO:0000313|EMBL:ARK31142.1};
OS Halalkalibacter krulwichiae.
OC Bacteria; Bacillota; Bacilli; Bacillales; Bacillaceae; Halalkalibacter.
OX NCBI_TaxID=199441 {ECO:0000313|EMBL:ARK31142.1, ECO:0000313|Proteomes:UP000193006};
RN [1] {ECO:0000313|EMBL:ARK31142.1, ECO:0000313|Proteomes:UP000193006}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=AM31D {ECO:0000313|EMBL:ARK31142.1,
RC ECO:0000313|Proteomes:UP000193006};
RA Krulwich T.A., Anastor L., Ehrlich R., Ehrlich G.D., Janto B.;
RT "Bacillus krulwichiae AM31D Genome sequencing and assembly.";
RL Submitted (APR-2017) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Subunits I and II form the functional core of the enzyme
CC complex. Electrons originating in cytochrome c are transferred via heme
CC a and Cu(A) to the binuclear center formed by heme a3 and Cu(B).
CC {ECO:0000256|ARBA:ARBA00024688, ECO:0000256|RuleBase:RU004024}.
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:RU004024};
CC -!- COFACTOR:
CC Name=Cu cation; Xref=ChEBI:CHEBI:23378;
CC Evidence={ECO:0000256|RuleBase:RU004024};
CC Note=Binds a copper A center. {ECO:0000256|RuleBase:RU004024};
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000256|RuleBase:RU000456};
CC Multi-pass membrane protein {ECO:0000256|RuleBase:RU000456}. Membrane
CC {ECO:0000256|ARBA:ARBA00004141}; Multi-pass membrane protein
CC {ECO:0000256|ARBA:ARBA00004141}.
CC -!- SIMILARITY: Belongs to the cytochrome c oxidase subunit 2 family.
CC {ECO:0000256|ARBA:ARBA00007866, ECO:0000256|RuleBase:RU000456}.
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DR EMBL; CP020814; ARK31142.1; -; Genomic_DNA.
DR RefSeq; WP_066150598.1; NZ_CP020814.1.
DR AlphaFoldDB; A0A1X9MKI3; -.
DR STRING; 199441.BkAM31D_15505; -.
DR KEGG; bkw:BkAM31D_15505; -.
DR Proteomes; UP000193006; Chromosome.
DR GO; GO:0005886; C:plasma 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 GO; GO:0020037; F:heme binding; IEA:InterPro.
DR CDD; cd04213; CuRO_CcO_Caa3_II; 1.
DR Gene3D; 1.10.287.90; -; 1.
DR Gene3D; 2.60.40.420; Cupredoxins - blue copper proteins; 1.
DR InterPro; IPR045187; CcO_II.
DR InterPro; IPR002429; CcO_II-like_C.
DR InterPro; IPR001505; Copper_CuA.
DR InterPro; IPR008972; Cupredoxin.
DR InterPro; IPR034236; CuRO_CcO_Caa3_II.
DR InterPro; IPR009056; Cyt_c-like_dom.
DR InterPro; IPR036909; Cyt_c-like_dom_sf.
DR InterPro; IPR014222; Cyt_c_oxidase_su2.
DR InterPro; IPR011759; Cyt_c_oxidase_su2_TM_dom.
DR InterPro; IPR036257; Cyt_c_oxidase_su2_TM_sf.
DR NCBIfam; TIGR02866; CoxB; 1.
DR PANTHER; PTHR22888:SF10; CYTOCHROME C OXIDASE SUBUNIT 2; 1.
DR PANTHER; PTHR22888; CYTOCHROME C OXIDASE, SUBUNIT II; 1.
DR Pfam; PF00116; COX2; 1.
DR Pfam; PF02790; COX2_TM; 1.
DR Pfam; PF00034; Cytochrom_C; 1.
DR PRINTS; PR01166; CYCOXIDASEII.
DR SUPFAM; SSF49503; Cupredoxins; 1.
DR SUPFAM; SSF46626; Cytochrome c; 1.
DR SUPFAM; SSF81464; Cytochrome c oxidase subunit II-like, transmembrane region; 1.
DR PROSITE; PS00078; COX2; 1.
DR PROSITE; PS50857; COX2_CUA; 1.
DR PROSITE; PS50999; COX2_TM; 1.
DR PROSITE; PS51007; CYTC; 1.
DR PROSITE; PS51257; PROKAR_LIPOPROTEIN; 1.
PE 3: Inferred from homology;
KW Copper {ECO:0000256|ARBA:ARBA00023008, ECO:0000256|RuleBase:RU004024};
KW Electron transport {ECO:0000256|ARBA:ARBA00022982,
KW ECO:0000256|RuleBase:RU000456};
KW Heme {ECO:0000256|ARBA:ARBA00022617, ECO:0000256|PROSITE-ProRule:PRU00433};
KW Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|PROSITE-ProRule:PRU00433};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|SAM:Phobius};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|PROSITE-
KW ProRule:PRU00433}; Oxidoreductase {ECO:0000313|EMBL:ARK31142.1};
KW Reference proteome {ECO:0000313|Proteomes:UP000193006};
KW Respiratory chain {ECO:0000256|ARBA:ARBA00022660,
KW ECO:0000256|RuleBase:RU000456};
KW Translocase {ECO:0000256|ARBA:ARBA00022967};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692,
KW ECO:0000256|RuleBase:RU000456};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989,
KW ECO:0000256|SAM:Phobius};
KW Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|RuleBase:RU000456}.
FT TRANSMEM 48..70
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT TRANSMEM 91..115
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 22..119
FT /note="Cytochrome oxidase subunit II transmembrane region
FT profile"
FT /evidence="ECO:0000259|PROSITE:PS50999"
FT DOMAIN 126..238
FT /note="Cytochrome oxidase subunit II copper A binding"
FT /evidence="ECO:0000259|PROSITE:PS50857"
FT DOMAIN 249..338
FT /note="Cytochrome c"
FT /evidence="ECO:0000259|PROSITE:PS51007"
SQ SEQUENCE 341 AA; 37805 MW; A6B312CEBC99739A CRC64;
MKLWKTAWRF LPLSLLLFLT GCMGETNLTA LDPKGPQSQW LFDNMLLSLY IMALVTIVVF
AIFFIILAKY RRTPGDDTIP KQVHGNTALE ITWTVIPIIL LTILAVPTIT GQFMLADTEP
DPEIGEDTVY IKVTGHQFWW QFDYEDEGFT AGQEVYIPVG EKVIFELHAQ DVQHSFWVPA
LGGKLDTIPG ITNHMWLEAD EPGVFKGKCA ELCGPAHALM DFKLVALERD DYDAWVAGMQ
EEVDVPTEGV LAEGRAVFEA NGCIGCHAIG GMGTAAGPAL SDYANREVVA GYLENTDENL
EAWIRDPESL KQGNNMPAFP DMSDADMEAL IAYLRSLDVQ N
//
