>cd01663 Cyt_c_Oxidase_I Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the respiratory chains of eukaryotes and most bacteria, is a multi-chain transmembrane protein located in the inner membrane of mitochondria and the cell membrane of prokaryotes. It catalyzes the reduction of O2 and simultaneously pumps protons across the membrane. The number of subunits varies from three to five in bacteria and up to 13 in mammalian mitochondria. Only subunits I and II are essential for function, but subunit III, which is also conserved, may play a role in assembly or oxygen delivery to the active site. Subunits I, II, and III of mammalian CcO are encoded within the mitochondrial genome and the remaining 10 subunits are encoded within the nuclear genome. Subunit I contains a heme-copper binuclear center (the active site where O2 is reduced to water) formed by a high-spin heme (heme a3) and a copper ion (CuB). It also contains a low-spin heme (heme a), believ

Probab=100.00 E-value=0 Score=1276.95 Aligned_cols=485 Identities=42% Similarity=0.842 Sum_probs=476.1 Q ss_pred CCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHH-HHHHHHHHHH Q ss_conf 014799999999999999999999999999850767566776687898999999999999999999999-9999999986 Q gi|254780473|r 62 VDHKKIGIMYIILSLVMLFRGFADAIMMRLQQAIASGGGEGYLDAHHYDQIFTAHGVIMIFFVAMPMIT-GIMNFVVPLQ 140 (671) Q Consensus 62 ~dHK~IGi~Yiv~a~~~ll~Gg~~allmR~qla~p~~~~~~~l~~~~Ynq~~T~HG~~Mif~~a~p~~~-G~~n~lvPl~ 140 (671) T Consensus 1 TdHK~IGi~Yl~~~~~~~~~Gg~~alliR~qL~~p~---~~~~~~~~Yn~~~T~HG~iMiF~~~~P~l~ggfgNylvPl~ 77 (488) T cd01663 1 TNHKDIGTLYLIFGLWSGLVGTSLSLLIRLELSQPG---SQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLM 77 (488) T ss_pred CCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCC---CCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 986999999999999999999999999999980887---66769999999999999999999999999999999999997 Q ss_pred CCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 49864005889999999999999999999971767788831347865587788520458877999999999875568999 Q gi|254780473|r 141 IGARDVSFPFLNNFSFWMTVAGAVVIMCSLFIGEFASVGWLAYPPLSGISYSPGVGVDYYIWGLQIAGIGTTLSGINLVV 220 (671) Q Consensus 141 iGardlaFPrlna~sfWl~~~g~~l~~~S~~~g~~~~~GWt~YpPLs~~~~spg~g~d~~i~gl~l~gigsll~~iNfi~ 220 (671) T Consensus 78 iGarDmAFPRlN~lsfWl~~~g~~ll~~s~~~~~g~~~GWt~YpPLs~~~~~~g~~~d~~i~~l~l~gissilg~iNfi~ 157 (488) T cd01663 78 IGAPDMAFPRLNNLSFWLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFIT 157 (488) T ss_pred CCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCEEECCCCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 69962012658888999977888987755513787887622503643456889741899999999999999998999999 Q ss_pred HHHHHCCCCCCHHHCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCEECCCCCCCCHHHHHHHHHHHHHHHHHHH Q ss_conf 99972368988313315666899999999997333578889987776329801146543210132212333401257999 Q gi|254780473|r 221 TIIKMRCPGMTMMKMPVFVWTAFCSNIMIIAAFPILTATLFLLTLDRYIGTNFFTNHLGGNPMMYINLIWIWGHPEVYIL 300 (671) Q Consensus 221 TI~~~RapGm~l~rmPlf~W~~l~tsil~i~a~PvL~~al~ll~lDr~~g~~FF~~~~GGdplL~q~LFW~fGHPeVYIl 300 (671) T Consensus 158 Ti~~~RapGm~~~rmPlf~W~~l~ts~l~l~a~PvL~~a~~mll~Dr~~gt~Ff~~~~GGdp~L~qhLFWffGHPeVYil 237 (488) T cd01663 158 TIFNMRAPGMTLEKMPLFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYIL 237 (488) T ss_pred HHHHCCCCCCCHHHCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCEEECCCCCCCHHHHHHHHHHCCCCEEEEE T ss_conf 89972888998644889999999999999998189999999998244457502367778754689999998399758998 Q ss_pred HHHHHHHHHHHHHHHC-CCCCHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 9879999999985310-564026689999999999997533221022478758899876533467889877999987874 Q gi|254780473|r 301 VLPAFGIFSEVVATFS-GKRLFGYNSMVYATLAITILSYTVWLHHFFTMGSGANVNAFFGIMTMVIAVPTGAKIFNWLFT 379 (671) Q Consensus 301 iLPa~Gi~seiip~fs-~kplfgy~~~v~A~~~i~~lsf~VW~HHmFt~G~~~~~~~~F~i~Tm~IaIPTgvkiFnwl~T 379 (671) T Consensus 238 iLPa~Giiseii~~~s~rkplfgy~~~v~a~~~i~~lsf~VW~HHmft~G~~~~~~~~f~~~T~~IaiPtgvkvf~w~~T 317 (488) T cd01663 238 ILPGFGIISHIISTFSGKKPVFGYLGMVYAMLSIGILGFIVWAHHMFTVGLDVDTRAYFTAATMIIAVPTGIKVFSWLAT 317 (488) T ss_pred ECCHHHHHHHHHHHHCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 24337889999998618873314079999999999999787240000678988899999999999986679999999999 Q ss_pred HCCCCCEECHHHHHHHHHHHHHHHHHHHHHHCCCCCCCEEECCCEEHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCC Q ss_conf 25873022437999999999999887556530343211121274220447899999999999999999962443076747 Q gi|254780473|r 380 MRLGKVRFEVPMMWTLGFMITFLIGGMTGVLLAVPPADFTLHNSLFLVAHFHNTIIGGVVFGLFAGIVYWFPKAFGYQLN 459 (671) Q Consensus 380 l~~G~ir~~~pml~~lgfi~~F~iGG~tGv~lA~~~~D~~lHnT~fVVAHFHyvl~gg~vf~~fagiyyW~Pk~~Gr~l~ 459 (671) T Consensus 318 l~~g~~~~~~p~l~~l~fi~~F~iGG~TGv~la~~~~D~~~HdTyfVVaHFHyvl~~g~vf~~~ag~yyw~Pk~tGr~~~ 397 (488) T cd01663 318 MWGGSIKFETPMLWALGFIFLFTIGGLTGVVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAIFAGFYYWFPKITGLSYN 397 (488) T ss_pred HHCCCCCCCHHHHHHHHHHHHHHHHCCCHHHHCCCCCCCCCCCCEEEEEEHHHHHHHHHHHHHHHHHHHHHHHHHCCCCC T ss_conf 83785223638999999999997204011541666446453685588842145788799999999999984887374520 Q ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCHHHCCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCC Q ss_conf 16899999999999999999999987640530300258700579999999999999999999999999997449535689 Q gi|254780473|r 460 SFWGKVSFWCWFVGFYLAFMPLYALGLKGVTRRLSQYEDTTLQVYYVVALLGAVLIGIGVFSFVLSFIVSFLNRSKLQDT 539 (671) Q Consensus 460 e~lgk~~Fwl~~iGf~l~F~pm~~lGl~GmpRR~~~y~~~~~~~~n~istiGa~l~~~g~l~f~~nl~~S~~~~~~~~~~ 539 (671) T Consensus 398 e~lg~~~f~~~~iG~~l~F~pmh~~Gl~GmPRR~~~Y~~-~~~~~n~istiGa~i~~~~~l~f~~n~~~S~~~g~~a~~- 475 (488) T cd01663 398 ETLGKIHFWLMFIGVNLTFFPQHFLGLAGMPRRYPDYPD-AYAGWNMISSIGSLISFVSVLLFLFIVWESFVSGRKVIF- 475 (488) T ss_pred HHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCH-HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCC- T ss_conf 789999999999999999999999865899874677747-689999999999999999999999999999863880779- Q ss_pred CCCCCC-CCCCCCCC Q ss_conf 998999-97101269 Q gi|254780473|r 540 IGDPWD-GRTLEWSI 553 (671) Q Consensus 540 ~~dPW~-~~tLEW~~ 553 (671) T Consensus 476 --npw~~~~tLEW~v 488 (488) T cd01663 476 --NVGEGSTSLEWTL 488 (488) T ss_pred --CCCCCCCCCCCCC T ss_conf --9999999853359

HHsearch alignment for GI: 254780473 and conserved domain: cd01663