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Conserved domains on  [gi|171465769|gb|ACB46170|]
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cytochrome oxidase subunit I, partial (mitochondrion) [Pholidoptera fallax]

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 ...
 2-177 2.37e-109

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: 321.05  E-value: 2.37e-109
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   2 NDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTV 81
Cdd:MTH00153  47 GDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSMVESGAGTGWTV 126

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  82 YPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITM 161
Cdd:MTH00153 127 YPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMPLFVWSVLITAILLLLSLPVLAGAITM 206

                        170
                 ....*....|....*.
gi 171465769 162 LLTDRNLNTSFFDPAG 177
Cdd:MTH00153 207 LLTDRNLNTSFFDPAG 222
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 2-177 2.37e-109

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 321.05  E-value: 2.37e-109
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   2 NDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTV 81
Cdd:MTH00153  47 GDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSMVESGAGTGWTV 126

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  82 YPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITM 161
Cdd:MTH00153 127 YPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMPLFVWSVLITAILLLLSLPVLAGAITM 206

                        170
                 ....*....|....*.
gi 171465769 162 LLTDRNLNTSFFDPAG 177
Cdd:MTH00153 207 LLTDRNLNTSFFDPAG 222
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-177 7.42e-99

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: 293.62  E-value: 7.42e-99
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   1 FNDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWT 80
Cdd:cd01663   39 LGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNLSFWLLPPSLLLLLLSALVEGGAGTGWT 118

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  81 VYPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:cd01663  119 VYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEKMPLFVWSVLITAFLLLLSLPVLAGAIT 198

                        170
                 ....*....|....*..
gi 171465769 161 MLLTDRNLNTSFFDPAG 177
Cdd:cd01663  199 MLLTDRNFNTSFFDPAG 215
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
7-177 8.39e-55

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 181.09  E-value: 8.39e-55
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   7 YNVIVTAHAFVMIFFMVMPiMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVYPPLS 86
Cdd:COG0843   57 YNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNALSFWLYLFGGLLLLISLFVGGAADVGWTFYPPLS 135

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  87 SGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITMLLTDR 166
Cdd:COG0843  136 GLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMPLFTWAALVTSILILLAFPVLAAALLLLLLDR 215

                        170
                 ....*....|.
gi 171465769 167 NLNTSFFDPAG 177
Cdd:COG0843  216 SLGTHFFDPAG 226
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-176 7.75e-33

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: 121.14  E-value: 7.75e-33
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769    1 FNDDQIYNVIVTAHAFVMIFFMVMPiMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSlveNGAGTGWT 80
Cdd:pfam00115  35 FLSPLTYNQLRTLHGNLMIFWFATP-FLFGFGNYLVPLMIGARDMAFPRLNALSFWLVVLGAVLLLASF---GGATTGWT 110

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   81 VYPPLSSGiahagas*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLdQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:pfam00115 111 EYPPLVGV--------DLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-RMPLFVWAILATAILILLAFPVLAAALL 181

                         170
                  ....*....|....*.
gi 171465769  161 MLLTDRNLNTSFFDPA 176
Cdd:pfam00115 182 LLLLDRSLGAGGGDPL 197
QoxB TIGR02882
cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type ...
 1-176 2.46e-27

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: 107.25  E-value: 2.46e-27
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769    1 FNDDQIYNVIVTAHAFVMIFFMVMPIMIGgFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWT 80
Cdd:TIGR02882  86 FLDAQHYNEIFTTHGVIMIIFMAMPFIIG-LMNIVVPLQIGARDVAFPVLNALSFWLFFAGAMLFNISFVIGGSPDAGWT 164

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   81 VYPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:TIGR02882 165 NYAPLAGPEFSPGVGVNYYLIALQISGIGTLMTGINFFVTILKMRAPGMKLMQMPMFTWTTLITTLIIIFAFPVLTVALA 244

                         170
                  ....*....|....*.
gi 171465769  161 MLLTDRNLNTSFFDPA 176
Cdd:TIGR02882 245 LMTTDRIFDTAFFTVA 260
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 2-177 2.37e-109

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 321.05  E-value: 2.37e-109
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   2 NDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTV 81
Cdd:MTH00153  47 GDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSMVESGAGTGWTV 126

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  82 YPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITM 161
Cdd:MTH00153 127 YPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMPLFVWSVLITAILLLLSLPVLAGAITM 206

                        170
                 ....*....|....*.
gi 171465769 162 LLTDRNLNTSFFDPAG 177
Cdd:MTH00153 207 LLTDRNLNTSFFDPAG 222
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-177 7.42e-99

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: 293.62  E-value: 7.42e-99
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   1 FNDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWT 80
Cdd:cd01663   39 LGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNLSFWLLPPSLLLLLLSALVEGGAGTGWT 118

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  81 VYPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:cd01663  119 VYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEKMPLFVWSVLITAFLLLLSLPVLAGAIT 198

                        170
                 ....*....|....*..
gi 171465769 161 MLLTDRNLNTSFFDPAG 177
Cdd:cd01663  199 MLLTDRNFNTSFFDPAG 215
COX1 MTH00167
cytochrome c oxidase subunit I; Provisional
 2-177 1.69e-93

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177222  Cd Length: 512  Bit Score: 280.79  E-value: 1.69e-93
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   2 NDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTV 81
Cdd:MTH00167  49 GDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSLLLLLASSGVEAGAGTGWTV 128

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  82 YPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITM 161
Cdd:MTH00167 129 YPPLAGNLAHAGASVDLAIFSLHLAGVSSILGSINFITTIINMKPPGITQYQTPLFVWSILVTTILLLLSLPVLAAAITM 208

                        170
                 ....*....|....*.
gi 171465769 162 LLTDRNLNTSFFDPAG 177
Cdd:MTH00167 209 LLTDRNLNTTFFDPAG 224
COX1 MTH00116
cytochrome c oxidase subunit I; Provisional
 1-177 2.40e-93

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177177  Cd Length: 515  Bit Score: 280.44  E-value: 2.40e-93
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   1 FNDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWT 80
Cdd:MTH00116  48 LGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSFLLLLASSTVEAGAGTGWT 127

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  81 VYPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:MTH00116 128 VYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTCINMKPPAMSQYQTPLFVWSVLITAVLLLLSLPVLAAGIT 207

                        170
                 ....*....|....*..
gi 171465769 161 MLLTDRNLNTSFFDPAG 177
Cdd:MTH00116 208 MLLTDRNLNTTFFDPAG 224
COX1 MTH00223
cytochrome c oxidase subunit I; Provisional
 1-177 4.50e-92

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177260  Cd Length: 512  Bit Score: 277.24  E-value: 4.50e-92
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   1 FNDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWT 80
Cdd:MTH00223  45 LGDDQLYNVIVTAHAFVMIFFLVMPMMIGGFGNWLVPLMLGAPDMAFPRLNNMSFWLLPPSLYLLLSSSAVESGVGTGWT 124

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  81 VYPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:MTH00223 125 VYPPLSSNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTIINMRSPGMQLERLPLFVWSVKVTAFLLLLSLPVLAGAIT 204

                        170
                 ....*....|....*..
gi 171465769 161 MLLTDRNLNTSFFDPAG 177
Cdd:MTH00223 205 MLLTDRNFNTSFFDPAG 221
COX1 MTH00142
cytochrome c oxidase subunit I; Provisional
 3-177 1.06e-91

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214431  Cd Length: 511  Bit Score: 276.22  E-value: 1.06e-91
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   3 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVY 82
Cdd:MTH00142  48 DDQLYNVIVTAHAFVMIFFMVMPVMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPALLLLLSSAAVESGAGTGWTVY 127

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  83 PPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITML 162
Cdd:MTH00142 128 PPLSSNLAHSGGSVDLAIFSLHLAGVSSILGAINFITTVINMRAGGMKFERVPLFVWSVKITAILLLLSLPVLAGAITML 207

                        170
                 ....*....|....*
gi 171465769 163 LTDRNLNTSFFDPAG 177
Cdd:MTH00142 208 LTDRNFNTSFFDPAG 222
COX1 MTH00037
cytochrome c oxidase subunit I; Provisional
 2-177 7.78e-85

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177112  Cd Length: 517  Bit Score: 258.61  E-value: 7.78e-85
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   2 NDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTV 81
Cdd:MTH00037  49 QDDQIYNVIVTAHALVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNMSFWLIPPSFLLLLASAGVESGAGTGWTI 128

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  82 YPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITM 161
Cdd:MTH00037 129 YPPLSSNIAHAGGSVDLAIFSLHLAGASSILASINFITTIINMRTPGMTFDRLPLFVWSVFITAFLLLLSLPVLAGAITM 208

                        170
                 ....*....|....*.
gi 171465769 162 LLTDRNLNTSFFDPAG 177
Cdd:MTH00037 209 LLTDRNINTTFFDPAG 224
COX1 MTH00183
cytochrome c oxidase subunit I; Provisional
 3-177 1.99e-82

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177234  Cd Length: 516  Bit Score: 252.54  E-value: 1.99e-82
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   3 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVY 82
Cdd:MTH00183  50 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNMSFWLLPPSFLLLLASSGVEAGAGTGWTVY 129

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  83 PPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITML 162
Cdd:MTH00183 130 PPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAISQYQTPLFVWAVLITAVLLLLSLPVLAAGITML 209

                        170
                 ....*....|....*
gi 171465769 163 LTDRNLNTSFFDPAG 177
Cdd:MTH00183 210 LTDRNLNTTFFDPAG 224
COX1 MTH00103
cytochrome c oxidase subunit I; Validated
 3-177 9.15e-82

cytochrome c oxidase subunit I; Validated


Pssm-ID: 177165  Cd Length: 513  Bit Score: 250.57  E-value: 9.15e-82
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   3 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVY 82
Cdd:MTH00103  50 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSFLLLLASSMVEAGAGTGWTVY 129

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  83 PPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITML 162
Cdd:MTH00103 130 PPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMSQYQTPLFVWSVLITAVLLLLSLPVLAAGITML 209

                        170
                 ....*....|....*
gi 171465769 163 LTDRNLNTSFFDPAG 177
Cdd:MTH00103 210 LTDRNLNTTFFDPAG 224
COX1 MTH00077
cytochrome c oxidase subunit I; Provisional
 3-177 1.24e-81

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214419  Cd Length: 514  Bit Score: 250.24  E-value: 1.24e-81
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   3 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVY 82
Cdd:MTH00077  50 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSFLLLLASSGVEAGAGTGWTVY 129

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  83 PPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITML 162
Cdd:MTH00077 130 PPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTSINMKPPSMSQYQTPLFVWSVLITAVLLLLSLPVLAAGITML 209

                        170
                 ....*....|....*
gi 171465769 163 LTDRNLNTSFFDPAG 177
Cdd:MTH00077 210 LTDRNLNTTFFDPAG 224
COX1 MTH00007
cytochrome c oxidase subunit I; Validated
 4-177 5.36e-81

cytochrome c oxidase subunit I; Validated


Pssm-ID: 133649  Cd Length: 511  Bit Score: 248.66  E-value: 5.36e-81
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   4 DQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVYP 83
Cdd:MTH00007  48 DQLYNTIVTAHAFLMIFFLVMPVFIGGFGNWLVPLMLGAPDMAFPRLNNMSFWLLPPALILLVSSAAVEKGVGTGWTVYP 127

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  84 PLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITMLL 163
Cdd:MTH00007 128 PLASNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTVINMRWKGLRLERIPLFVWAVVITVVLLLLSLPVLAGAITMLL 207

                        170
                 ....*....|....
gi 171465769 164 TDRNLNTSFFDPAG 177
Cdd:MTH00007 208 TDRNLNTSFFDPAG 221
COX1 MTH00182
cytochrome c oxidase subunit I; Provisional
 3-177 6.84e-78

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214451  Cd Length: 525  Bit Score: 240.88  E-value: 6.84e-78
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   3 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVY 82
Cdd:MTH00182  52 DDHLYNVIVTAHAFIMIFFLVMPVMIGGFGNWLVPLYIGAPDMAFPRLNNISFWLLPPALILLLGSAFVEQGAGTGWTVY 131

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  83 PPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITML 162
Cdd:MTH00182 132 PPLSSIQAHSGGAVDMAIFSLHLAGVSSILGAINFITTIFNMRAPGVTFNRLPLFVWSILITAFLLLLSLPVLAGAITML 211

                        170
                 ....*....|....*
gi 171465769 163 LTDRNLNTSFFDPAG 177
Cdd:MTH00182 212 LTDRNFNTTFFDPAG 226
COX1 MTH00184
cytochrome c oxidase subunit I; Provisional
 3-177 3.47e-77

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177235  Cd Length: 519  Bit Score: 238.96  E-value: 3.47e-77
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   3 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVY 82
Cdd:MTH00184  52 DDHLYNVIVTAHAFVMIFFLVMPVMIGGFGNWFVPLYIGAPDMAFPRLNNISFWLLPPALTLLLGSAFVEQGAGTGWTVY 131

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  83 PPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITML 162
Cdd:MTH00184 132 PPLSSIQAHSGGSVDMAIFSLHLAGISSILGAMNFITTIFNMRAPGITMDRMPLFVWSILVTTFLLLLSLPVLAGAITML 211

                        170
                 ....*....|....*
gi 171465769 163 LTDRNLNTSFFDPAG 177
Cdd:MTH00184 212 LTDRNFNTTFFDPAG 226
COX1 MTH00079
cytochrome c oxidase subunit I; Provisional
 1-177 7.56e-74

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177148  Cd Length: 508  Bit Score: 229.95  E-value: 7.56e-74
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   1 FNDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWT 80
Cdd:MTH00079  49 LGNGQLYNSVITAHAILMIFFMVMPSMIGGFGNWMLPLMLGAPDMSFPRLNNLSFWLLPTSLFLILDSCFVDMGPGTSWT 128

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  81 VYPPLSSgIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:MTH00079 129 VYPPLST-LGHPGSSVDLAIFSLHCAGISSILGGINFMVTTKNLRSSSISLEHMSLFVWTVFVTVFLLVLSLPVLAGAIT 207

                        170
                 ....*....|....*..
gi 171465769 161 MLLTDRNLNTSFFDPAG 177
Cdd:MTH00079 208 MLLTDRNLNTSFFDPST 224
COX1 MTH00026
cytochrome c oxidase subunit I; Provisional
 3-177 1.99e-69

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 164599  Cd Length: 534  Bit Score: 219.50  E-value: 1.99e-69
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   3 DDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVY 82
Cdd:MTH00026  51 DDHLYNVIVTAHAFVMIFFLVMPTMIGGFGNWFVPLMIGAPDMAFPRLNNISFWLLPPALFLLLGSSLVEQGAGTGWTVY 130

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  83 PPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITML 162
Cdd:MTH00026 131 PPLASIQAHSGGSVDMAIFSLHLAGLSSILGAMNFITTVMNMRTPGMTMSRIPLFVWSVFITAILLLLSLPVLAGAITML 210

                        170
                 ....*....|....*
gi 171465769 163 LTDRNLNTSFFDPAG 177
Cdd:MTH00026 211 LTDRNFNTTFFDPAG 225
Heme_Cu_Oxidase_I cd00919
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
 1-177 2.22e-60

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: 193.90  E-value: 2.22e-60
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   1 FNDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPlMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWT 80
Cdd:cd00919   37 FLDPQLYNQLVTAHGVIMIFFFVMPAIFGGFGNLLPP-LIGARDLAFPRLNNLSFWLFPPGLLLLLSSVLVGGGAGTGWT 115

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  81 VYPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:cd00919  116 FYPPLSTLSYSSGVGVDLAILGLHLAGVSSILGAINFITTILNMRAPGMTLDKMPLFVWSVLVTAILLLLALPVLAAALV 195

                        170
                 ....*....|....*..
gi 171465769 161 MLLTDRNLNTSFFDPAG 177
Cdd:cd00919  196 MLLLDRNFGTSFFDPAG 212
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
7-177 8.39e-55

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 181.09  E-value: 8.39e-55
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   7 YNVIVTAHAFVMIFFMVMPiMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVYPPLS 86
Cdd:COG0843   57 YNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNALSFWLYLFGGLLLLISLFVGGAADVGWTFYPPLS 135

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  87 SGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITMLLTDR 166
Cdd:COG0843  136 GLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMPLFTWAALVTSILILLAFPVLAAALLLLLLDR 215

                        170
                 ....*....|.
gi 171465769 167 NLNTSFFDPAG 177
Cdd:COG0843  216 SLGTHFFDPAG 226
COX1 MTH00048
cytochrome c oxidase subunit I; Provisional
 6-177 2.97e-46

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177123  Cd Length: 511  Bit Score: 157.92  E-value: 2.97e-46
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   6 IYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVenGAGTGWTVYPPL 85
Cdd:MTH00048  54 VYNFLITNHGIIMIFFFLMPVLIGGFGNYLLPLLLGLSDLNLPRLNALSAWLLVPSIVFLLLSMCL--GAGVGWTFYPPL 131

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  86 SSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLdQTPLFVWAFAITALLLLLSLPVLAGAITMLLTD 165
Cdd:MTH00048 132 SSSLFSSSWGVDFLMFSLHLAGVSSLFGSINFICTIYSAFMTNVFS-RTSIILWSYLFTSILLLLSLPVLAAAITMLLFD 210

                        170
                 ....*....|..
gi 171465769 166 RNLNTSFFDPAG 177
Cdd:MTH00048 211 RNFGSAFFDPLG 222
Ubiquinol_Oxidase_I cd01662
Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory ...
 7-177 3.39e-44

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: 152.35  E-value: 3.39e-44
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   7 YNVIVTAHAFVMIFFMVMPIMIGgFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVYPPLS 86
Cdd:cd01662   49 YNQIFTMHGTIMIFLFAMPLVFG-LMNYLVPLQIGARDVAFPRLNALSFWLFLFGGLLLNASLLIGGFPDAGWFAYPPLS 127

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  87 SGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITMLLTDR 166
Cdd:cd01662  128 GLEYSPGVGVDYWILGLQFSGIGTLLGAINFIVTILKMRAPGMTLMRMPIFTWTTLVTSILILFAFPVLTAALALLELDR 207

                        170
                 ....*....|.
gi 171465769 167 NLNTSFFDPAG 177
Cdd:cd01662  208 YFGTHFFTNAL 218
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-176 7.75e-33

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: 121.14  E-value: 7.75e-33
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769    1 FNDDQIYNVIVTAHAFVMIFFMVMPiMIGGFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSlveNGAGTGWT 80
Cdd:pfam00115  35 FLSPLTYNQLRTLHGNLMIFWFATP-FLFGFGNYLVPLMIGARDMAFPRLNALSFWLVVLGAVLLLASF---GGATTGWT 110

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   81 VYPPLSSGiahagas*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLdQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:pfam00115 111 EYPPLVGV--------DLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-RMPLFVWAILATAILILLAFPVLAAALL 181

                         170
                  ....*....|....*.
gi 171465769  161 MLLTDRNLNTSFFDPA 176
Cdd:pfam00115 182 LLLLDRSLGAGGGDPL 197
PRK15017 PRK15017
cytochrome o ubiquinol oxidase subunit I; Provisional
 7-173 2.13e-31

cytochrome o ubiquinol oxidase subunit I; Provisional


Pssm-ID: 184978  Cd Length: 663  Bit Score: 118.88  E-value: 2.13e-31
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   7 YNVIVTAHAFVMIFFMVMPIMIGgFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWTVYPPLS 86
Cdd:PRK15017  99 YDQIFTAHGVIMIFFVAMPFVIG-LMNLVVPLQIGARDVAFPFLNNLSFWFTVVGVILVNVSLGVGEFAQTGWLAYPPLS 177

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769  87 SGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAITMLLTDR 166
Cdd:PRK15017 178 GIEYSPGVGVDYWIWSLQLSGIGTTLTGINFFVTILKMRAPGMTMFKMPVFTWASLCANVLIIASFPILTVTVALLTLDR 257


                 ....*..
gi 171465769 167 NLNTSFF 173
Cdd:PRK15017 258 YLGTHFF 264
QoxB TIGR02882
cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type ...
 1-176 2.46e-27

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: 107.25  E-value: 2.46e-27
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769    1 FNDDQIYNVIVTAHAFVMIFFMVMPIMIGgFGNWLVPLMLGAPDMAFPRMNNMSFWLLPPSLTLLLSSSLVENGAGTGWT 80
Cdd:TIGR02882  86 FLDAQHYNEIFTTHGVIMIIFMAMPFIIG-LMNIVVPLQIGARDVAFPVLNALSFWLFFAGAMLFNISFVIGGSPDAGWT 164

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 171465769   81 VYPPLSSGIAHAGAS*DLAIFSLHLAGASSILGAVNFITTTINMRAPGMSLDQTPLFVWAFAITALLLLLSLPVLAGAIT 160
Cdd:TIGR02882 165 NYAPLAGPEFSPGVGVNYYLIALQISGIGTLMTGINFFVTILKMRAPGMKLMQMPMFTWTTLITTLIIIFAFPVLTVALA 244

                         170
                  ....*....|....*.
gi 171465769  161 MLLTDRNLNTSFFDPA 176
Cdd:TIGR02882 245 LMTTDRIFDTAFFTVA 260
 
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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