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Conserved domains on  [gi|831250058|gb|AKM12387|]
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cytochrome oxidase subunit I, partial (mitochondrion) [Sarcophaga dux]

Protein Classification

heme-copper oxidase family protein( domain architecture ID 14)

heme-copper oxidase family protein may catalyze the transfer of electrons from an electron donor onto molecular oxygen

Graphical summary

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List of domain hits

 Name Accession Description Interval E-value
Heme_Cu_Oxidase_I super family cl00275
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
 1-335 0e+00

Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in the respiratory chains of prokaryotes and mitochondria which catalyze the reduction of O2 and simultaneously pump protons across the membrane. The superfamily is diverse in terms of electron donors, subunit composition, and heme types. The number of subunits varies from three to five in bacteria and up to 13 in mammalian mitochondria. It has been proposed that Archaea acquired heme-copper oxidases through gene transfer from Gram-positive bacteria. Membership in the superfamily is defined by subunit I, which contains a heme-copper binuclear center (the active site where O2 is reduced to water) formed by a high-spin heme and a copper ion. It also contains a low-spin heme, believed to participate in the transfer of electrons to the binuclear center. Only subunit I is common to the entire superfamily. For every reduction of an O2 molecule, eight protons are taken from the inside aqueous compartment and four electrons are taken from the electron donor on the opposite side of the membrane. The four electrons and four of the protons are used in the reduction of O2; the four remaining protons are pumped across the membrane. This charge separation of four charges contributes to the electrochemical gradient used for ATP synthesis. Two proton channels, the D-pathway and K-pathway, leading to the binuclear center have been identified in subunit I of cytochrome c oxidase (CcO) and ubiquinol oxidase. A well-defined pathway for the transfer of pumped protons beyond the binuclear center has not been identified. Electron transfer occurs in two segments: from the electron donor to the low-spin heme, and from the low-spin heme to the binuclear center. The first segment can be a multi-step process and varies among the different families, while the second segment, a direct transfer, is consistent throughout the superfamily.


The actual alignment was detected with superfamily member MTH00153:

Pssm-ID: 469701  Cd Length: 511  Bit Score: 688.14  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00153  19 IFGAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNM 98

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00153  99 SFWLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDR 178

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00153 179 MPLFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 258

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00153 259 ESGKKETFGTLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGSQINYSPSLLW 338

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00153 339 ALGFVFLFTIGGLTG 353
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-335 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 688.14  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00153  19 IFGAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNM 98

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00153  99 SFWLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDR 178

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00153 179 MPLFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 258

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00153 259 ESGKKETFGTLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGSQINYSPSLLW 338

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00153 339 ALGFVFLFTIGGLTG 353
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-335 0e+00

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), believed to participate in the transfer of electrons to the binuclear center. For every reduction of an O2 molecule, eight protons are taken from the inside aqueous compartment and four electrons are taken from cytochrome c on the opposite side of the membrane. The four electrons and four of the protons are used in the reduction of O2; the four remaining protons are pumped across the membrane. This charge separation of four charges contributes to the electrochemical gradient used for ATP synthesis. Two proton channels, the D-pathway and K-pathway, leading to the binuclear center have been identified in subunit I. A well-defined pathway for the transfer of pumped protons beyond the binuclear center has not been identified. Electrons are transferred from cytochrome c (the electron donor) to heme a via the CuA binuclear site in subunit II, and directly from heme a to the binuclear center.


Pssm-ID: 238833  Cd Length: 488  Bit Score: 611.02  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:cd01663   12 IFGLWSGLVGTSLSLLIRLELSQPGSQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNL 91

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:cd01663   92 SFWLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEK 171

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:cd01663  172 MPLFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISHIIST 251

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:cd01663  252 FSGKKPVFGYLGMVYAMLSIGILGFIVWAHHMFTVGLDVDTRAYFTAATMIIAVPTGIKVFSWLATMWGGSIKFETPMLW 331

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:cd01663  332 ALGFIFLFTIGGLTG 346
CtaD_CoxA TIGR02891
cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) ...
 1-335 8.36e-131

cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) of cytochrome c oxidases of bacterial origin. Cytochrome c oxidase is the component of the respiratory chain that catalyzes the reduction of oxygen to water. Subunits I-III form the functional core of the enzyme complex. Subunit I is the catalytic subunit of the enzyme. Electrons originating in cytochrome c are transferred via the copper A center of subunit II and heme a of subunit I to the bimetallic center formed by heme a3 and copper B. This cytochrome c oxidase shows proton pump activity across the membrane in addition to the electron transfer. In the bacilli an apparent split (paralogism) has created a sister clade (TIGR02882) encoding subunits (QoxA) of the aa3-type quinone oxidase complex which reacts directly with quinones, bypassing the interaction with soluble cytochrome c. This model attempts to exclude these sequences, placing them between the trusted and noise cutoffs. These families, as well as archaeal and eukaryotic cytochrome c subunit I's are included within the superfamily model, pfam00115. [Energy metabolism, Electron transport]


Pssm-ID: 213748  Cd Length: 499  Bit Score: 382.34  E-value: 8.36e-131
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058    1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMiGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:TIGR02891  15 VTAFAFFLVGGVLALLMRAQLATPGNTFMDAETYNQLFTMHGTIMIFLFAIPIL-AGFGNYLLPLMIGARDMAFPRLNAF 93

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:TIGR02891  94 SYWLYLFGGLLLLASFFTGGAPDTGWTMYPPLSSTSGSPGVGVDLWLLGLHLLGISSILGAVNFIVTILNMRAPGMTLMR 173

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:TIGR02891 174 MPLFVWGILVTSILILLAFPVLIAALILLLLDRLFGTHFFDPARGGDPLLWQHLFWFFGHPEVYIIFLPAFGIISEILPT 253

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  241 ESGKKeTFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:TIGR02891 254 FARKP-IFGYRAMVYATVAIGFLSFGVWAHHMFTTGMPPLALAFFSAATMLIAVPTGVKVFNWIATLWGGSIRFTTPMLF 332

                         330
                  ....*....|....*
gi 831250058  321 ALGFVFLFTVGGLTG 335
Cdd:TIGR02891 333 ALGFIFLFVIGGLTG 347
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
1-335 2.33e-129

Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];


Pssm-ID: 440605  Cd Length: 535  Bit Score: 379.86  E-value: 2.33e-129
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPiMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:COG0843   24 VTAFVFLLIGGLLALLMRLQLAGPGLGLLSPETYNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNAL 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:COG0843  103 SFWLYLFGGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMR 182

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:COG0843  183 MPLFTWAALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLFWFFGHPEVYILILPAFGIVSEIIPT 262

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKeTFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:COG0843  263 FSRKP-LFGYKAMVLATVAIAFLSFLVWAHHMFTPGISPLVKAFFSIATMLIAVPTGVKVFNWIATMWRGRIRFTTPMLF 341

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:COG0843  342 ALGFIILFVIGGLTG 356
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-335 5.51e-85

Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key enzyme in aerobic metabolism. Proton pumping haem-copper oxidases represent the terminal, energy-transfer enzymes of respiratory chains in prokaryotes and eukaryotes. The CuB-haem a3 (or haem o) binuclear centre, associated with the largest subunit I of cytochrome c and ubiquinol oxidases (E.C:1.10.3.11), is directly involved in the coupling between dioxygen reduction and proton pumping. Some terminal oxidases generate a transmembrane proton gradient across the plasma membrane (prokaryotes) or the mitochondrial inner membrane (eukaryotes). The enzyme complex consists of 3-4 subunits (prokaryotes) up to 13 polypeptides (mammals) of which only the catalytic subunit (equivalent to mammalian subunit I (COXI) is found in all haem-copper respiratory oxidases. The presence of a bimetallic centre (formed by a high-spin haem and copper B) as well as a low-spin haem, both ligated to six conserved histidine residues near the outer side of four transmembrane spans within CO I is common to all family members.


Pssm-ID: 459678  Cd Length: 432  Bit Score: 262.89  E-value: 5.51e-85
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058    1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPiMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:pfam00115   8 VTALVWFLVGGLLGLLIRLQLAFPGLNFLSPLTYNQLRTLHGNLMIFWFATP-FLFGFGNYLVPLMIGARDMAFPRLNAL 86

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   81 SFWLLPPALTLLLVSSMvenGAGTGWTVYPPLssniahggASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFdR 160
Cdd:pfam00115  87 SFWLVVLGAVLLLASFG---GATTGWTEYPPL--------VGVDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-R 154

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINtsffdpAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:pfam00115 155 MPLFVWAILATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLFWWFGHPEVYILILPAFGIIYYILPK 228

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  241 ESGKKeTFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLN-YSPATL 319
Cdd:pfam00115 229 FAGRP-LFGYKLSVLAFWLIAFLGFLVWAHHLFTTGLPPWLQALFSVFSMLIAVPSGVKVFNWLATLWGGWIRfRTTPML 307

                         330
                  ....*....|....*.
gi 831250058  320 WALGFVFLFTVGGLTG 335
Cdd:pfam00115 308 FFLGFAFLFIIGGLTG 323
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-335 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 688.14  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00153  19 IFGAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNM 98

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00153  99 SFWLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDR 178

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00153 179 MPLFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 258

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00153 259 ESGKKETFGTLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGSQINYSPSLLW 338

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00153 339 ALGFVFLFTIGGLTG 353
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-335 0e+00

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), believed to participate in the transfer of electrons to the binuclear center. For every reduction of an O2 molecule, eight protons are taken from the inside aqueous compartment and four electrons are taken from cytochrome c on the opposite side of the membrane. The four electrons and four of the protons are used in the reduction of O2; the four remaining protons are pumped across the membrane. This charge separation of four charges contributes to the electrochemical gradient used for ATP synthesis. Two proton channels, the D-pathway and K-pathway, leading to the binuclear center have been identified in subunit I. A well-defined pathway for the transfer of pumped protons beyond the binuclear center has not been identified. Electrons are transferred from cytochrome c (the electron donor) to heme a via the CuA binuclear site in subunit II, and directly from heme a to the binuclear center.


Pssm-ID: 238833  Cd Length: 488  Bit Score: 611.02  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:cd01663   12 IFGLWSGLVGTSLSLLIRLELSQPGSQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNL 91

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:cd01663   92 SFWLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEK 171

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:cd01663  172 MPLFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISHIIST 251

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:cd01663  252 FSGKKPVFGYLGMVYAMLSIGILGFIVWAHHMFTVGLDVDTRAYFTAATMIIAVPTGIKVFSWLATMWGGSIKFETPMLW 331

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:cd01663  332 ALGFIFLFTIGGLTG 346
COX1 MTH00167
cytochrome c oxidase subunit I; Provisional
 1-335 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177222  Cd Length: 512  Bit Score: 577.78  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00167  21 IFGAWAGMVGTALSLLIRAELSQPGSLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00167 101 SFWLLPPSLLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGSINFITTIINMKPPGITQYQ 180

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00167 181 TPLFVWSILVTTILLLLSLPVLAAAITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVVY 260

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00167 261 YSGKKEPFGYMGMVWAMMAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKVFSWLATLHGGKIKWETPMLW 340

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00167 341 ALGFIFLFTVGGLTG 355
COX1 MTH00223
cytochrome c oxidase subunit I; Provisional
 1-335 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177260  Cd Length: 512  Bit Score: 577.31  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00223  18 IFGMWSGLVGTSLSLLIRAELGQPGALLGDDQLYNVIVTAHAFVMIFFLVMPMMIGGFGNWLVPLMLGAPDMAFPRLNNM 97

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00223  98 SFWLLPPSLYLLLSSSAVESGVGTGWTVYPPLSSNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTIINMRSPGMQLER 177

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00223 178 LPLFVWSVKVTAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVSH 257

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00223 258 YSSKKEVFGTLGMIYAMLSIGVLGFIVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWLATIYGSKIKYEAPMLW 337

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00223 338 ALGFIFLFTVGGLTG 352
COX1 MTH00142
cytochrome c oxidase subunit I; Provisional
 1-335 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214431  Cd Length: 511  Bit Score: 571.28  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00142  19 LFGAWAGMVGTGLSLLIRAELGQPGSLLGDDQLYNVIVTAHAFVMIFFMVMPVMIGGFGNWLVPLMLGAPDMAFPRMNNM 98

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00142  99 SFWLLPPALLLLLSSAAVESGAGTGWTVYPPLSSNLAHSGGSVDLAIFSLHLAGVSSILGAINFITTVINMRAGGMKFER 178

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00142 179 VPLFVWSVKITAILLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIINH 258

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00142 259 YSGKKEVFGTLGMIYAMLSIGLLGFIVWAHHMFTVGMDVDTRAYFTAATMVIAVPTGIKVFSWLATLHGSKVKYEPPMLW 338

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00142 339 ALGFIFLFTVGGLTG 353
COX1 MTH00116
cytochrome c oxidase subunit I; Provisional
 1-335 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177177  Cd Length: 515  Bit Score: 568.57  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00116  21 IFGAWAGMVGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00116 101 SFWLLPPSFLLLLASSTVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTCINMKPPAMSQYQ 180

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00116 181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISHIVTY 260

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00116 261 YAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAIPTGIKVFSWLATLHGGTIKWDPPMLW 340

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00116 341 ALGFIFLFTIGGLTG 355
COX1 MTH00037
cytochrome c oxidase subunit I; Provisional
 1-335 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177112  Cd Length: 517  Bit Score: 519.77  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00037  21 IFGAWAGMVGTAMSVIIRTELAQPGSLLQDDQIYNVIVTAHALVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00037 101 SFWLIPPSFLLLLASAGVESGAGTGWTIYPPLSSNIAHAGGSVDLAIFSLHLAGASSILASINFITTIINMRTPGMTFDR 180

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00037 181 LPLFVWSVFITAFLLLLSLPVLAGAITMLLTDRNINTTFFDPAGGGDPILFQHLFWFFGHPEVYILILPGFGMISHVIAH 260

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00037 261 YSGKQEPFGYLGMVYAMIAIGILGFLVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWMATLQGSNLRWETPLLW 340

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00037 341 ALGFVFLFTIGGLTG 355
COX1 MTH00103
cytochrome c oxidase subunit I; Validated
 1-335 0e+00

cytochrome c oxidase subunit I; Validated


Pssm-ID: 177165  Cd Length: 513  Bit Score: 519.44  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00103  21 LFGAWAGMVGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00103 101 SFWLLPPSFLLLLASSMVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMSQYQ 180

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00103 181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVTY 260

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00103 261 YSGKKEPFGYMGMVWAMMSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAIPTGVKVFSWLATLHGGNIKWSPAMLW 340

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00103 341 ALGFIFLFTVGGLTG 355
COX1 MTH00007
cytochrome c oxidase subunit I; Validated
 1-335 0e+00

cytochrome c oxidase subunit I; Validated


Pssm-ID: 133649  Cd Length: 511  Bit Score: 515.61  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00007  18 ILGVWGGLLGTSMSLLIRIELGQPGAFLGSDQLYNTIVTAHAFLMIFFLVMPVFIGGFGNWLVPLMLGAPDMAFPRLNNM 97

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00007  98 SFWLLPPALILLVSSAAVEKGVGTGWTVYPPLASNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTVINMRWKGLRLER 177

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00007 178 IPLFVWAVVITVVLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGAISHIVTH 257

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00007 258 YAGKLEPFGTLGMIYAMLGIGVLGFIVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWLATIHGSPIKYETPMLW 337

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00007 338 ALGFIFLFTTGGLTG 352
COX1 MTH00183
cytochrome c oxidase subunit I; Provisional
 1-335 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177234  Cd Length: 516  Bit Score: 514.47  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00183  21 VFGAWAGMVGTALSLLIRAELSQPGALLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00183 101 SFWLLPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAISQYQ 180

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00183 181 TPLFVWAVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVAY 260

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00183 261 YSGKKEPFGYMGMVWAMMAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAIPTGVKVFSWLATLHGGSIKWETPLLW 340

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00183 341 ALGFIFLFTVGGLTG 355
COX1 MTH00077
cytochrome c oxidase subunit I; Provisional
 1-335 4.22e-179

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214419  Cd Length: 514  Bit Score: 505.63  E-value: 4.22e-179
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00077  21 VFGAWAGMVGTALSLLIRAELSQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00077 101 SFWLLPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTSINMKPPSMSQYQ 180

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00077 181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPVLYQHLFWFFGHPEVYILILPGFGMISHIVTY 260

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00077 261 YSAKKEPFGYMGMVWAMMSIGLLGFIVWAHHMFTVDLNVDTRAYFTSATMIIAIPTGVKVFSWLATMHGGAIKWDAAMLW 340

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00077 341 ALGFIFLFTVGGLTG 355
COX1 MTH00182
cytochrome c oxidase subunit I; Provisional
 1-335 7.16e-172

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214451  Cd Length: 525  Bit Score: 487.79  E-value: 7.16e-172
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00182  23 VFGAGAGMIGTAFSMLIRLELSAPGAMLGDDHLYNVIVTAHAFIMIFFLVMPVMIGGFGNWLVPLYIGAPDMAFPRLNNI 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00182 103 SFWLLPPALILLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGAVDMAIFSLHLAGVSSILGAINFITTIFNMRAPGVTFNR 182

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00182 183 LPLFVWSILITAFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILFQHLFWFFGHPEVYILILPGFGMISQIIPT 262

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00182 263 FVAKKQIFGYLGMVYAMLSIGILGFIVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWLATIYGGTLRLDTPMLW 342

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00182 343 AMGFVFLFTLGGLTG 357
COX1 MTH00079
cytochrome c oxidase subunit I; Provisional
 1-335 2.70e-171

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177148  Cd Length: 508  Bit Score: 485.72  E-value: 2.70e-171
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00079  22 LFGLWSGMVGTSLSLIIRLELSKPGLLLGNGQLYNSVITAHAILMIFFMVMPSMIGGFGNWMLPLMLGAPDMSFPRLNNL 101

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSnIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00079 102 SFWLLPTSLFLILDSCFVDMGPGTSWTVYPPLST-LGHPGSSVDLAIFSLHCAGISSILGGINFMVTTKNLRSSSISLEH 180

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00079 181 MSLFVWTVFVTVFLLVLSLPVLAGAITMLLTDRNLNTSFFDPSTGGNPLLYQHLFWFFGHPEVYILILPAFGIISQSTLY 260

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00079 261 LTGKKEVFGSLGMVYAILSIGLIGCVVWAHHMYTVGMDLDSRAYFTAATMVIAVPTGVKVFSWLATLFGMKMKFQPLLLW 340

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00079 341 VLGFIFLFTIGGLTG 355
COX1 MTH00184
cytochrome c oxidase subunit I; Provisional
 1-335 2.63e-167

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177235  Cd Length: 519  Bit Score: 475.86  E-value: 2.63e-167
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00184  23 LFGAFAGMIGTAFSMLIRLELSAPGSMLGDDHLYNVIVTAHAFVMIFFLVMPVMIGGFGNWFVPLYIGAPDMAFPRLNNI 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00184 103 SFWLLPPALTLLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGSVDMAIFSLHLAGISSILGAMNFITTIFNMRAPGITMDR 182

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00184 183 MPLFVWSILVTTFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISQIIPT 262

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:MTH00184 263 FAAKKQIFGYLGMVYAMVSIGILGFIVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKIFSWIATIFGGSLRLDTPMLW 342

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:MTH00184 343 AIGFVFLFTMGGLTG 357
COX1 MTH00026
cytochrome c oxidase subunit I; Provisional
 1-335 2.77e-150

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 164599  Cd Length: 534  Bit Score: 433.29  E-value: 2.77e-150
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00026  22 VFGALSGAIGTAFSMLIRLELSSPGSMLGDDHLYNVIVTAHAFVMIFFLVMPTMIGGFGNWFVPLMIGAPDMAFPRLNNI 101

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:MTH00026 102 SFWLLPPALFLLLGSSLVEQGAGTGWTVYPPLASIQAHSGGSVDMAIFSLHLAGLSSILGAMNFITTVMNMRTPGMTMSR 181

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00026 182 IPLFVWSVFITAILLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISQILSL 261

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLN--YSPAT 318
Cdd:MTH00026 262 FSYKKQIFGYLGMVYAMLAIGVLGFIVWAHHMYVVGMDVDTRAYFTAATMIIAVPTGIKIFSWLATVSGSGRNliFTTPM 341

                        330
                 ....*....|....*..
gi 831250058 319 LWALGFVFLFTVGGLTG 335
Cdd:MTH00026 342 AWALGFIFLFTIGGLTG 358
Heme_Cu_Oxidase_I cd00919
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
 1-336 2.13e-141

Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in the respiratory chains of prokaryotes and mitochondria which catalyze the reduction of O2 and simultaneously pump protons across the membrane. The superfamily is diverse in terms of electron donors, subunit composition, and heme types. The number of subunits varies from three to five in bacteria and up to 13 in mammalian mitochondria. It has been proposed that Archaea acquired heme-copper oxidases through gene transfer from Gram-positive bacteria. Membership in the superfamily is defined by subunit I, which contains a heme-copper binuclear center (the active site where O2 is reduced to water) formed by a high-spin heme and a copper ion. It also contains a low-spin heme, believed to participate in the transfer of electrons to the binuclear center. Only subunit I is common to the entire superfamily. For every reduction of an O2 molecule, eight protons are taken from the inside aqueous compartment and four electrons are taken from the electron donor on the opposite side of the membrane. The four electrons and four of the protons are used in the reduction of O2; the four remaining protons are pumped across the membrane. This charge separation of four charges contributes to the electrochemical gradient used for ATP synthesis. Two proton channels, the D-pathway and K-pathway, leading to the binuclear center have been identified in subunit I of cytochrome c oxidase (CcO) and ubiquinol oxidase. A well-defined pathway for the transfer of pumped protons beyond the binuclear center has not been identified. Electron transfer occurs in two segments: from the electron donor to the low-spin heme, and from the low-spin heme to the binuclear center. The first segment can be a multi-step process and varies among the different families, while the second segment, a direct transfer, is consistent throughout the superfamily.


Pssm-ID: 238461  Cd Length: 463  Bit Score: 408.07  E-value: 2.13e-141
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPiMLGAPDMAFPRMNNM 80
Cdd:cd00919   10 IFAFVALLLGGLLALLIRLELATPGSLFLDPQLYNQLVTAHGVIMIFFFVMPAIFGGFGNLLPP-LIGARDLAFPRLNNL 88

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:cd00919   89 SFWLFPPGLLLLLSSVLVGGGAGTGWTFYPPLSTLSYSSGVGVDLAILGLHLAGVSSILGAINFITTILNMRAPGMTLDK 168

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:cd00919  169 MPLFVWSVLVTAILLLLALPVLAAALVMLLLDRNFGTSFFDPAGGGDPVLYQHLFWFFGHPEVYILILPAFGAISEIIPT 248

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKeTFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:cd00919  249 FSGKP-LFGYKLMVYAFLAIGFLSFLVWAHHMFTVGLPVDTRAYFTAATMIIAVPTGIKVFNWLATLWGGRIRFDPPMLF 327

                        330
                 ....*....|....*.
gi 831250058 321 ALGFVFLFTVGGLTGS 336
Cdd:cd00919  328 ALGFLFLFTIGGLTGV 343
CtaD_CoxA TIGR02891
cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) ...
 1-335 8.36e-131

cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) of cytochrome c oxidases of bacterial origin. Cytochrome c oxidase is the component of the respiratory chain that catalyzes the reduction of oxygen to water. Subunits I-III form the functional core of the enzyme complex. Subunit I is the catalytic subunit of the enzyme. Electrons originating in cytochrome c are transferred via the copper A center of subunit II and heme a of subunit I to the bimetallic center formed by heme a3 and copper B. This cytochrome c oxidase shows proton pump activity across the membrane in addition to the electron transfer. In the bacilli an apparent split (paralogism) has created a sister clade (TIGR02882) encoding subunits (QoxA) of the aa3-type quinone oxidase complex which reacts directly with quinones, bypassing the interaction with soluble cytochrome c. This model attempts to exclude these sequences, placing them between the trusted and noise cutoffs. These families, as well as archaeal and eukaryotic cytochrome c subunit I's are included within the superfamily model, pfam00115. [Energy metabolism, Electron transport]


Pssm-ID: 213748  Cd Length: 499  Bit Score: 382.34  E-value: 8.36e-131
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058    1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMiGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:TIGR02891  15 VTAFAFFLVGGVLALLMRAQLATPGNTFMDAETYNQLFTMHGTIMIFLFAIPIL-AGFGNYLLPLMIGARDMAFPRLNAF 93

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:TIGR02891  94 SYWLYLFGGLLLLASFFTGGAPDTGWTMYPPLSSTSGSPGVGVDLWLLGLHLLGISSILGAVNFIVTILNMRAPGMTLMR 173

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:TIGR02891 174 MPLFVWGILVTSILILLAFPVLIAALILLLLDRLFGTHFFDPARGGDPLLWQHLFWFFGHPEVYIIFLPAFGIISEILPT 253

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  241 ESGKKeTFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:TIGR02891 254 FARKP-IFGYRAMVYATVAIGFLSFGVWAHHMFTTGMPPLALAFFSAATMLIAVPTGVKVFNWIATLWGGSIRFTTPMLF 332

                         330
                  ....*....|....*
gi 831250058  321 ALGFVFLFTVGGLTG 335
Cdd:TIGR02891 333 ALGFIFLFVIGGLTG 347
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
1-335 2.33e-129

Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];


Pssm-ID: 440605  Cd Length: 535  Bit Score: 379.86  E-value: 2.33e-129
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPiMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:COG0843   24 VTAFVFLLIGGLLALLMRLQLAGPGLGLLSPETYNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNAL 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDR 160
Cdd:COG0843  103 SFWLYLFGGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMR 182

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:COG0843  183 MPLFTWAALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLFWFFGHPEVYILILPAFGIVSEIIPT 262

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKeTFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLW 320
Cdd:COG0843  263 FSRKP-LFGYKAMVLATVAIAFLSFLVWAHHMFTPGISPLVKAFFSIATMLIAVPTGVKVFNWIATMWRGRIRFTTPMLF 341

                        330
                 ....*....|....*
gi 831250058 321 ALGFVFLFTVGGLTG 335
Cdd:COG0843  342 ALGFIILFVIGGLTG 356
COX1 MTH00048
cytochrome c oxidase subunit I; Provisional
 1-335 1.84e-122

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177123  Cd Length: 511  Bit Score: 361.69  E-value: 1.84e-122
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:MTH00048  22 LLGVWSGFVGLSLSLLIRLNFLDPYYNVISLDVYNFLITNHGIIMIFFFLMPVLIGGFGNYLLPLLLGLSDLNLPRLNAL 101

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  81 SFWLLPPALTLLLVSSMVenGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFdR 160
Cdd:MTH00048 102 SAWLLVPSIVFLLLSMCL--GAGVGWTFYPPLSSSLFSSSWGVDFLMFSLHLAGVSSLFGSINFICTIYSAFMTNVFS-R 178

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:MTH00048 179 TSIILWSYLFTSILLLLSLPVLAAAITMLLFDRNFGSAFFDPLGGGDPVLFQHMFWFFGHPEVYVLILPGFGIISHICLS 258

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 241 ESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYS-PATL 319
Cdd:MTH00048 259 LSNNDDPFGYYGLVFAMFSIVCLGSVVWAHHMFTVGLDVKTAVFFSSVTMIIGVPTGIKVFSWLYMLLNSRVRKSdPVVW 338

                        330
                 ....*....|....*.
gi 831250058 320 WALGFVFLFTVGGLTG 335
Cdd:MTH00048 339 WVVSFIVLFTIGGVTG 354
Ubiquinol_Oxidase_I cd01662
Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory ...
 10-335 1.69e-113

Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory chains of aerobic bacteria, is a multi-chain transmembrane protein located in the cell membrane. It catalyzes the reduction of O2 and simultaneously pumps protons across the membrane. The number of subunits in ubiquinol oxidase varies from two to five. Subunit I contains a heme-copper binuclear center (the active site where O2 is reduced to water) formed by a high-spin heme and a copper ion. It also contains a low-spin heme, believed to participate in the transfer of electrons from ubiquinol to the binuclear center. For every reduction of an O2 molecule, eight protons are taken from the inside aqueous compartment and four electrons are taken from ubiquinol on the opposite side of the membrane. The four electrons and four of the protons are used in the reduction of O2; the four remaining protons are pumped across the membrane. This charge separation of four charges contributes to the electrochemical gradient used for ATP synthesis. Two proton channels, the D-pathway and K-pathway, leading to the binuclear center have been identified in subunit I. It is generally believed that the channels contain water molecules that act as 'proton wires' to transfer the protons. A well-defined pathway for the transfer of pumped protons beyond the binuclear center has not been identified. Electrons are believed to be transferred directly from ubiquinol (the electron donor) to the low-spin heme, and directly from the low-spin heme to the binuclear center.


Pssm-ID: 238832  Cd Length: 501  Bit Score: 338.40  E-value: 1.69e-113
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  10 GTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGgFGNWLVPIMLGAPDMAFPRMNNMSFWLLPPAL 89
Cdd:cd01662   25 GGVDALLMRTQLALPGNDFLSPEHYNQIFTMHGTIMIFLFAMPLVFG-LMNYLVPLQIGARDVAFPRLNALSFWLFLFGG 103

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  90 TLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDRMPLFVWSVV 169
Cdd:cd01662  104 LLLNASLLIGGFPDAGWFAYPPLSGLEYSPGVGVDYWILGLQFSGIGTLLGAINFIVTILKMRAPGMTLMRMPIFTWTTL 183

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 170 ITALLLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeTFG 249
Cdd:cd01662  184 VTSILILFAFPVLTAALALLELDRYFGTHFFTNALGGNPMLWQHLFWIFGHPEVYILILPAFGIFSEIVPTFSRKP-LFG 262

                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 250 SLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLWALGFVFLFT 329
Cdd:cd01662  263 YRSMVYATVAIGFLSFGVWVHHMFTTGAGALVNAFFSIATMIIAVPTGVKIFNWLFTMWRGRIRFETPMLWAIGFLVTFV 342


                 ....*.
gi 831250058 330 VGGLTG 335
Cdd:cd01662  343 IGGLTG 348
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-335 5.51e-85

Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key enzyme in aerobic metabolism. Proton pumping haem-copper oxidases represent the terminal, energy-transfer enzymes of respiratory chains in prokaryotes and eukaryotes. The CuB-haem a3 (or haem o) binuclear centre, associated with the largest subunit I of cytochrome c and ubiquinol oxidases (E.C:1.10.3.11), is directly involved in the coupling between dioxygen reduction and proton pumping. Some terminal oxidases generate a transmembrane proton gradient across the plasma membrane (prokaryotes) or the mitochondrial inner membrane (eukaryotes). The enzyme complex consists of 3-4 subunits (prokaryotes) up to 13 polypeptides (mammals) of which only the catalytic subunit (equivalent to mammalian subunit I (COXI) is found in all haem-copper respiratory oxidases. The presence of a bimetallic centre (formed by a high-spin haem and copper B) as well as a low-spin haem, both ligated to six conserved histidine residues near the outer side of four transmembrane spans within CO I is common to all family members.


Pssm-ID: 459678  Cd Length: 432  Bit Score: 262.89  E-value: 5.51e-85
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058    1 IFGAWAGMVGTSLSILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPiMIGGFGNWLVPIMLGAPDMAFPRMNNM 80
Cdd:pfam00115   8 VTALVWFLVGGLLGLLIRLQLAFPGLNFLSPLTYNQLRTLHGNLMIFWFATP-FLFGFGNYLVPLMIGARDMAFPRLNAL 86

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   81 SFWLLPPALTLLLVSSMvenGAGTGWTVYPPLssniahggASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFdR 160
Cdd:pfam00115  87 SFWLVVLGAVLLLASFG---GATTGWTEYPPL--------VGVDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-R 154

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  161 MPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNINtsffdpAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQ 240
Cdd:pfam00115 155 MPLFVWAILATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLFWWFGHPEVYILILPAFGIIYYILPK 228

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  241 ESGKKeTFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLN-YSPATL 319
Cdd:pfam00115 229 FAGRP-LFGYKLSVLAFWLIAFLGFLVWAHHLFTTGLPPWLQALFSVFSMLIAVPSGVKVFNWLATLWGGWIRfRTTPML 307

                         330
                  ....*....|....*.
gi 831250058  320 WALGFVFLFTVGGLTG 335
Cdd:pfam00115 308 FFLGFAFLFIIGGLTG 323
PRK15017 PRK15017
cytochrome o ubiquinol oxidase subunit I; Provisional
 34-335 5.28e-75

cytochrome o ubiquinol oxidase subunit I; Provisional


Pssm-ID: 184978  Cd Length: 663  Bit Score: 243.30  E-value: 5.28e-75
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  34 YNVIVTAHAFIMIFFMVMPIMIGgFGNWLVPIMLGAPDMAFPRMNNMSFWLLPPALTLLLVSSMVENGAGTGWTVYPPLS 113
Cdd:PRK15017  99 YDQIFTAHGVIMIFFVAMPFVIG-LMNLVVPLQIGARDVAFPFLNNLSFWFTVVGVILVNVSLGVGEFAQTGWLAYPPLS 177

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 114 SNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDRMPLFVWSVVITALLLLLSLPVLAGAITMLLTDR 193
Cdd:PRK15017 178 GIEYSPGVGVDYWIWSLQLSGIGTTLTGINFFVTILKMRAPGMTMFKMPVFTWASLCANVLIIASFPILTVTVALLTLDR 257

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 194 NINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESgKKETFGSLGMIYAMLAIGLLGFIVWAHHMF 273
Cdd:PRK15017 258 YLGTHFFTNDMGGNMMMYINLIWAWGHPEVYILILPVFGVFSEIAATFS-RKRLFGYTSLVWATVCITVLSFIVWLHHFF 336

                        250       260       270       280       290       300
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 831250058 274 TVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLWALGFVFLFTVGGLTG 335
Cdd:PRK15017 337 TMGAGANVNAFFGITTMIIAIPTGVKIFNWLFTMYQGRIVFHSAMLWTIGFIVTFSVGGMTG 398
QoxB TIGR02882
cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type ...
 14-335 6.35e-74

cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type quinone oxidase, one of several bacterial terminal oxidases. This complex couples oxidation of reduced quinones with the reduction of molecular oxygen to water and the pumping of protons to form a proton gradient utilized for ATP production. aa3-type oxidases contain two heme a cofactors as well as copper atoms in the active site. [Energy metabolism, Electron transport]


Pssm-ID: 131928  Cd Length: 643  Bit Score: 240.14  E-value: 6.35e-74
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   14 SILIRAELGHPGALIGDDQIYNVIVTAHAFIMIFFMVMPIMIGgFGNWLVPIMLGAPDMAFPRMNNMSFWLLPPALTLLL 93
Cdd:TIGR02882  72 ALLMRAQLTVPDNKFLDAQHYNEIFTTHGVIMIIFMAMPFIIG-LMNIVVPLQIGARDVAFPVLNALSFWLFFAGAMLFN 150

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058   94 VSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDRMPLFVWSVVITAL 173
Cdd:TIGR02882 151 ISFVIGGSPDAGWTNYAPLAGPEFSPGVGVNYYLIALQISGIGTLMTGINFFVTILKMRAPGMKLMQMPMFTWTTLITTL 230

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  174 LLLLSLPVLAGAITMLLTDRNINTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESgKKETFGSLGM 253
Cdd:TIGR02882 231 IIIFAFPVLTVALALMTTDRIFDTAFFTVAHGGMPMLWANLFWIWGHPEVYIVILPAFGIYSEIISTFA-QKRLFGYKSM 309

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  254 IYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLWALGFVFLFTVGGL 333
Cdd:TIGR02882 310 VWSTVGIAFLSFLVWVHHFFTMGNGALINSFFSITTMAIAIPTGVKIFNWLLTLYKGKIRFTTPMLFSLAFIPNFLIGGV 389


                  ..
gi 831250058  334 TG 335
Cdd:TIGR02882 390 TG 391
ba3-like_Oxidase_I cd01660
ba3-like heme-copper oxidase subunit I. The ba3 family of heme-copper oxidases are ...
 26-307 9.10e-05

ba3-like heme-copper oxidase subunit I. The ba3 family of heme-copper oxidases are transmembrane protein complexes in the respiratory chains of prokaryotes and some archaea which catalyze the reduction of O2 and simultaneously pump protons across the membrane. It has been proposed that Archaea acquired heme-copper oxidases through gene transfer from Gram-positive bacteria. The ba3 family contains oxidases that lack the conserved residues that form the D- and K-pathways in CcO and ubiquinol oxidase. Instead they contain a potential alternative K-pathway. Additional proton channels have been proposed for this family of oxidases but none have been identified definitively. For general information on the heme-copper oxidase superfamily, please see cd00919.


Pssm-ID: 238830  Cd Length: 473  Bit Score: 43.81  E-value: 9.10e-05
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058  26 ALIGDDQIYNVIVTAHAFIM-IFFMVMPIMigGFGNWLVPIMLGAPDMAfPRMNNMSFWLLPPALTLLLVSsMVENGAGT 104
Cdd:cd01660   36 PLPSSGILYYQGLTLHGVLLaIVFTTFFIM--GFFYAIVARALLRSLFN-RRLAWAGFWLMVIGTVMAAVP-ILLGQASV 111

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 105 GWTVYPPLssnIAHGGASVDLAIFSLHlagiSSILGAVNFITTVINMRStgITFDRMPLFVWSVVITALLLLLSLPVLAG 184
Cdd:cd01660  112 LYTFYPPL---QAHPLFYIGAALVVVG----SWISGFAMFVTLWRWKKA--NPGKKVPLATFMVVTTMILWLVASLGVAL 182

                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 831250058 185 AITMLLtdrnINTSFFDpAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKETFGSLGMIyAMLAIGLLG 264
Cdd:cd01660  183 EVLFQL----LPWSLGL-VDTVDVLLSRTLFWWFGHPLVYFWLLPAYIAWYTILPKIAGGKLFSDPLARL-AFILFLLFS 256

                        250       260       270       280
                 ....*....|....*....|....*....|....*....|....
gi 831250058 265 FIVWAHHMFT-VGMDVDTRAYFTSATMIIAVPTGIKIFSWLATL 307
Cdd:cd01660  257 TPVGFHHQFAdPGIGPGWKFIHMVLTFMVALPSLLTAFTVFASL 300
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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