NCBI Home Page NCBI Site Search page NCBI Guide that lists and describes the NCBI resources
Conserved domains on  [gi|116607237|gb|ABK05927|]
View 

cytochrome oxidase subunit 1, partial (mitochondrion) [Limnadia sp. BOLD:AAI1302]

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

 Zoom to residue level

show extra options »

Show site features     Horizontal zoom: ×

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 ...
 1-213 1.58e-143

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: 410.03  E-value: 1.58e-143
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00153  21 GAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSF 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00153 101 WLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMP 180

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00153 181 LFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 233
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-213 1.58e-143

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 410.03  E-value: 1.58e-143
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00153  21 GAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSF 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00153 101 WLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMP 180

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00153 181 LFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 233
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-213 4.41e-127

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: 367.19  E-value: 4.41e-127
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:cd01663   14 GLWSGLVGTSLSLLIRLELSQPGSQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNLSF 93

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:cd01663   94 WLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEKMP 173

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:cd01663  174 LFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLF 226
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
6-213 7.96e-71

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 224.24  E-value: 7.96e-71
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   6 MVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPIlIGGFGNWLVPLMLGAPDMAFPRLNNMSFWLLPP 85
Cdd:COG0843   31 LIGGLLALLMRLQLAGPGLGLLSPETYNQLFTMHGTIMIFFFATPF-LAGFGNYLVPLQIGARDMAFPRLNALSFWLYLF 109

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  86 ALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIPLFVWA 165
Cdd:COG0843  110 GGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMPLFTWA 189

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*...
gi 116607237 166 VGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:COG0843  190 ALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLF 237
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 5-213 5.86e-44

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: 151.96  E-value: 5.86e-44
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237    5 GMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPIlIGGFGNWLVPLMLGAPDMAFPRLNNMSFWLLP 84
Cdd:pfam00115  14 FLVGGLLGLLIRLQLAFPGLNFLSPLTYNQLRTLHGNLMIFWFATPF-LFGFGNYLVPLMIGARDMAFPRLNALSFWLVV 92

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   85 PALILLLSGAGvesGAGTGWTVYPPLSAgiahagasVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLdRIPLFVW 164
Cdd:pfam00115  93 LGAVLLLASFG---GATTGWTEYPPLVG--------VDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-RMPLFVW 160

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*....
gi 116607237  165 AVGITALLLLLSLPVLAGAITMLLTDRNLNtsffdpAGGGDPILYQHLF 213
Cdd:pfam00115 161 AILATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLF 203
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-213 1.58e-143

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 410.03  E-value: 1.58e-143
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00153  21 GAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSF 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00153 101 WLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMP 180

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00153 181 LFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 233
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-213 4.41e-127

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: 367.19  E-value: 4.41e-127
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:cd01663   14 GLWSGLVGTSLSLLIRLELSQPGSQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNLSF 93

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:cd01663   94 WLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEKMP 173

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:cd01663  174 LFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLF 226
COX1 MTH00167
cytochrome c oxidase subunit I; Provisional
 1-213 2.62e-122

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177222  Cd Length: 512  Bit Score: 355.91  E-value: 2.62e-122
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00167  23 GAWAGMVGTALSLLIRAELSQPGSLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSF 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00167 103 WLLPPSLLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGSINFITTIINMKPPGITQYQTP 182

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00167 183 LFVWSILVTTILLLLSLPVLAAAITMLLTDRNLNTTFFDPAGGGDPILYQHLF 235
COX1 MTH00116
cytochrome c oxidase subunit I; Provisional
 1-213 2.24e-121

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177177  Cd Length: 515  Bit Score: 353.63  E-value: 2.24e-121
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00116  23 GAWAGMVGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSF 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00116 103 WLLPPSFLLLLASSTVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTCINMKPPAMSQYQTP 182

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00116 183 LFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLF 235
COX1 MTH00142
cytochrome c oxidase subunit I; Provisional
 1-213 8.24e-121

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214431  Cd Length: 511  Bit Score: 352.10  E-value: 8.24e-121
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00142  21 GAWAGMVGTGLSLLIRAELGQPGSLLGDDQLYNVIVTAHAFVMIFFMVMPVMIGGFGNWLVPLMLGAPDMAFPRMNNMSF 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00142 101 WLLPPALLLLLSSAAVESGAGTGWTVYPPLSSNLAHSGGSVDLAIFSLHLAGVSSILGAINFITTVINMRAGGMKFERVP 180

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00142 181 LFVWSVKITAILLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLF 233
COX1 MTH00223
cytochrome c oxidase subunit I; Provisional
 1-213 2.93e-118

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177260  Cd Length: 512  Bit Score: 345.42  E-value: 2.93e-118
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00223  20 GMWSGLVGTSLSLLIRAELGQPGALLGDDQLYNVIVTAHAFVMIFFLVMPMMIGGFGNWLVPLMLGAPDMAFPRLNNMSF 99

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00223 100 WLLPPSLYLLLSSSAVESGVGTGWTVYPPLSSNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTIINMRSPGMQLERLP 179

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00223 180 LFVWSVKVTAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLF 232
COX1 MTH00037
cytochrome c oxidase subunit I; Provisional
 1-213 7.56e-110

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177112  Cd Length: 517  Bit Score: 324.48  E-value: 7.56e-110
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00037  23 GAWAGMVGTAMSVIIRTELAQPGSLLQDDQIYNVIVTAHALVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNMSF 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00037 103 WLIPPSFLLLLASAGVESGAGTGWTIYPPLSSNIAHAGGSVDLAIFSLHLAGASSILASINFITTIINMRTPGMTFDRLP 182

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00037 183 LFVWSVFITAFLLLLSLPVLAGAITMLLTDRNINTTFFDPAGGGDPILFQHLF 235
COX1 MTH00007
cytochrome c oxidase subunit I; Validated
 1-213 4.31e-109

cytochrome c oxidase subunit I; Validated


Pssm-ID: 133649  Cd Length: 511  Bit Score: 322.24  E-value: 4.31e-109
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00007  20 GVWGGLLGTSMSLLIRIELGQPGAFLGSDQLYNTIVTAHAFLMIFFLVMPVFIGGFGNWLVPLMLGAPDMAFPRLNNMSF 99

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00007 100 WLLPPALILLVSSAAVEKGVGTGWTVYPPLASNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTVINMRWKGLRLERIP 179

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00007 180 LFVWAVVITVVLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 232
COX1 MTH00183
cytochrome c oxidase subunit I; Provisional
 1-213 7.00e-108

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177234  Cd Length: 516  Bit Score: 319.18  E-value: 7.00e-108
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00183  23 GAWAGMVGTALSLLIRAELSQPGALLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNMSF 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00183 103 WLLPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAISQYQTP 182

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00183 183 LFVWAVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLF 235
COX1 MTH00077
cytochrome c oxidase subunit I; Provisional
 1-213 1.32e-107

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214419  Cd Length: 514  Bit Score: 318.42  E-value: 1.32e-107
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00077  23 GAWAGMVGTALSLLIRAELSQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSF 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00077 103 WLLPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTSINMKPPSMSQYQTP 182

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00077 183 LFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPVLYQHLF 235
COX1 MTH00103
cytochrome c oxidase subunit I; Validated
 1-213 8.09e-107

cytochrome c oxidase subunit I; Validated


Pssm-ID: 177165  Cd Length: 513  Bit Score: 316.44  E-value: 8.09e-107
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00103  23 GAWAGMVGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSF 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00103 103 WLLPPSFLLLLASSMVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMSQYQTP 182

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00103 183 LFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLF 235
COX1 MTH00184
cytochrome c oxidase subunit I; Provisional
 1-213 3.63e-99

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177235  Cd Length: 519  Bit Score: 297.12  E-value: 3.63e-99
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00184  25 GAFAGMIGTAFSMLIRLELSAPGSMLGDDHLYNVIVTAHAFVMIFFLVMPVMIGGFGNWFVPLYIGAPDMAFPRLNNISF 104

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00184 105 WLLPPALTLLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGSVDMAIFSLHLAGISSILGAMNFITTIFNMRAPGITMDRMP 184

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00184 185 LFVWSILVTTFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLF 237
COX1 MTH00182
cytochrome c oxidase subunit I; Provisional
 1-213 8.41e-99

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214451  Cd Length: 525  Bit Score: 296.35  E-value: 8.41e-99
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00182  25 GAGAGMIGTAFSMLIRLELSAPGAMLGDDHLYNVIVTAHAFIMIFFLVMPVMIGGFGNWLVPLYIGAPDMAFPRLNNISF 104

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00182 105 WLLPPALILLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGAVDMAIFSLHLAGVSSILGAINFITTIFNMRAPGVTFNRLP 184

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00182 185 LFVWSILITAFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILFQHLF 237
COX1 MTH00079
cytochrome c oxidase subunit I; Provisional
 1-213 7.55e-97

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177148  Cd Length: 508  Bit Score: 290.81  E-value: 7.55e-97
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00079  24 GLWSGMVGTSLSLIIRLELSKPGLLLGNGQLYNSVITAHAILMIFFMVMPSMIGGFGNWMLPLMLGAPDMSFPRLNNLSF 103

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAgIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00079 104 WLLPTSLFLILDSCFVDMGPGTSWTVYPPLST-LGHPGSSVDLAIFSLHCAGISSILGGINFMVTTKNLRSSSISLEHMS 182

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00079 183 LFVWTVFVTVFLLVLSLPVLAGAITMLLTDRNLNTSFFDPSTGGNPLLYQHLF 235
COX1 MTH00026
cytochrome c oxidase subunit I; Provisional
 1-213 2.91e-89

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 164599  Cd Length: 534  Bit Score: 272.27  E-value: 2.91e-89
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00026  24 GALSGAIGTAFSMLIRLELSSPGSMLGDDHLYNVIVTAHAFVMIFFLVMPTMIGGFGNWFVPLMIGAPDMAFPRLNNISF 103

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:MTH00026 104 WLLPPALFLLLGSSLVEQGAGTGWTVYPPLASIQAHSGGSVDMAIFSLHLAGLSSILGAMNFITTVMNMRTPGMTMSRIP 183

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00026 184 LFVWSVFITAILLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLF 236
Heme_Cu_Oxidase_I cd00919
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
 1-213 4.10e-79

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: 243.98  E-value: 4.10e-79
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPlMLGAPDMAFPRLNNMSF 80
Cdd:cd00919   12 AFVALLLGGLLALLIRLELATPGSLFLDPQLYNQLVTAHGVIMIFFFVMPAIFGGFGNLLPP-LIGARDLAFPRLNNLSF 90

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIP 160
Cdd:cd00919   91 WLFPPGLLLLLSSVLVGGGAGTGWTFYPPLSTLSYSSGVGVDLAILGLHLAGVSSILGAINFITTILNMRAPGMTLDKMP 170

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:cd00919  171 LFVWSVLVTAILLLLALPVLAAALVMLLLDRNFGTSFFDPAGGGDPVLYQHLF 223
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
6-213 7.96e-71

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 224.24  E-value: 7.96e-71
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   6 MVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPIlIGGFGNWLVPLMLGAPDMAFPRLNNMSFWLLPP 85
Cdd:COG0843   31 LIGGLLALLMRLQLAGPGLGLLSPETYNQLFTMHGTIMIFFFATPF-LAGFGNYLVPLQIGARDMAFPRLNALSFWLYLF 109

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  86 ALILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIPLFVWA 165
Cdd:COG0843  110 GGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMPLFTWA 189

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*...
gi 116607237 166 VGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:COG0843  190 ALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLF 237
COX1 MTH00048
cytochrome c oxidase subunit I; Provisional
 1-213 5.69e-64

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177123  Cd Length: 511  Bit Score: 206.07  E-value: 5.69e-64
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   1 GAWSGMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPILIGGFGNWLVPLMLGAPDMAFPRLNNMSF 80
Cdd:MTH00048  24 GVWSGFVGLSLSLLIRLNFLDPYYNVISLDVYNFLITNHGIIMIFFFLMPVLIGGFGNYLLPLLLGLSDLNLPRLNALSA 103

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  81 WLLPPALILLLsgAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLdRIP 160
Cdd:MTH00048 104 WLLVPSIVFLL--LSMCLGAGVGWTFYPPLSSSLFSSSWGVDFLMFSLHLAGVSSLFGSINFICTIYSAFMTNVFS-RTS 180

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|...
gi 116607237 161 LFVWAVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:MTH00048 181 IILWSYLFTSILLLLSLPVLAAAITMLLFDRNFGSAFFDPLGGGDPVLFQHMF 233
Ubiquinol_Oxidase_I cd01662
Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory ...
 8-213 1.66e-57

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: 188.94  E-value: 1.66e-57
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   8 GTALSLLIRVELGQP-GSFIGDDQiYNVVVTAHAFIMIFFMVMPILIGgFGNWLVPLMLGAPDMAFPRLNNMSFWLLPPA 86
Cdd:cd01662   25 GGVDALLMRTQLALPgNDFLSPEH-YNQIFTMHGTIMIFLFAMPLVFG-LMNYLVPLQIGARDVAFPRLNALSFWLFLFG 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  87 LILLLSGAGVESGAGTGWTVYPPLSAGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIPLFVWAV 166
Cdd:cd01662  103 GLLLNASLLIGGFPDAGWFAYPPLSGLEYSPGVGVDYWILGLQFSGIGTLLGAINFIVTILKMRAPGMTLMRMPIFTWTT 182

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 116607237 167 GITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLF 213
Cdd:cd01662  183 LVTSILILFAFPVLTAALALLELDRYFGTHFFTNALGGNPMLWQHLF 229
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 5-213 5.86e-44

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: 151.96  E-value: 5.86e-44
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237    5 GMVGTALSLLIRVELGQPGSFIGDDQIYNVVVTAHAFIMIFFMVMPIlIGGFGNWLVPLMLGAPDMAFPRLNNMSFWLLP 84
Cdd:pfam00115  14 FLVGGLLGLLIRLQLAFPGLNFLSPLTYNQLRTLHGNLMIFWFATPF-LFGFGNYLVPLMIGARDMAFPRLNALSFWLVV 92

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237   85 PALILLLSGAGvesGAGTGWTVYPPLSAgiahagasVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLdRIPLFVW 164
Cdd:pfam00115  93 LGAVLLLASFG---GATTGWTEYPPLVG--------VDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-RMPLFVW 160

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*....
gi 116607237  165 AVGITALLLLLSLPVLAGAITMLLTDRNLNtsffdpAGGGDPILYQHLF 213
Cdd:pfam00115 161 AILATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLF 203
PRK15017 PRK15017
cytochrome o ubiquinol oxidase subunit I; Provisional
 32-212 8.24e-35

cytochrome o ubiquinol oxidase subunit I; Provisional


Pssm-ID: 184978  Cd Length: 663  Bit Score: 130.06  E-value: 8.24e-35
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237  32 YNVVVTAHAFIMIFFMVMPILIGgFGNWLVPLMLGAPDMAFPRLNNMSFWLLPPALILLLSGAGVESGAGTGWTVYPPLS 111
Cdd:PRK15017  99 YDQIFTAHGVIMIFFVAMPFVIG-LMNLVVPLQIGARDVAFPFLNNLSFWFTVVGVILVNVSLGVGEFAQTGWLAYPPLS 177

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 116607237 112 AGIAHAGASVDLSIFSLHLAGVSSILGAINFITTIINMRVHGMTLDRIPLFVWAVGITALLLLLSLPVLAGAITMLLTDR 191
Cdd:PRK15017 178 GIEYSPGVGVDYWIWSLQLSGIGTTLTGINFFVTILKMRAPGMTMFKMPVFTWASLCANVLIIASFPILTVTVALLTLDR 257

                        170       180
                 ....*....|....*....|.
gi 116607237 192 NLNTSFFDPAGGGDPILYQHL 212
Cdd:PRK15017 258 YLGTHFFTNDMGGNMMMYINL 278
 
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.
Help | Disclaimer | Write to the Help Desk
NCBI | NLM | NIH