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Conserved domains on  [gi|2719227361|gb|WZN19770.1|]
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cytochrome oxidase subunit 1, partial (mitochondrion) [Porolithon sp. 11]

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 ...
1-219 1.71e-124

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 cd01663:

Pssm-ID: 469701  Cd Length: 488  Bit Score: 361.03  E-value: 1.71e-124
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNQLllGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:cd01663    14 GLWSGLVGTSLSLLIRLELSQPGSQL--GNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNL 91
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:cd01663    92 SFWLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEK 171
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:cd01663   172 MPLFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 230
 
Name Accession Description Interval E-value
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
1-219 1.71e-124

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: 361.03  E-value: 1.71e-124
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNQLllGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:cd01663    14 GLWSGLVGTSLSLLIRLELSQPGSQL--GNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNL 91
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:cd01663    92 SFWLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEK 171
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:cd01663   172 MPLFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 230
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
1-219 1.47e-121

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 354.17  E-value: 1.47e-121
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00153   21 GAWSGMVGTSLSLLIRAELGQPGS--LIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNM 98
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00153   99 SFWLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDR 178
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00153  179 MPLFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFG 237
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
3-219 4.07e-74

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 233.10  E-value: 4.07e-74
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   3 FSGVLGACVSMLIRMELAQPGNQLLLGNHqvYNVLITAHAILMIFFLVMPvMIGGFGNWLVPIMIGSPDMAFPRLNNISF 82
Cdd:COG0843    28 VFLLIGGLLALLMRLQLAGPGLGLLSPET--YNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNALSF 104
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  83 WLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYRMP 162
Cdd:COG0843   105 WLYLFGGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMP 184
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*..
gi 2719227361 163 LFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:COG0843   185 LFTWAALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLFWFFG 241
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
1-219 2.62e-45

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: 155.81  E-value: 2.62e-45
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNQLLlgNHQVYNVLITAHAILMIFFLVMPvMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:pfam00115  10 ALVWFLVGGLLGLLIRLQLAFPGLNFL--SPLTYNQLRTLHGNLMIFWFATP-FLFGFGNYLVPLMIGARDMAFPRLNAL 86
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLvevGVGTGWTVYPPLssiqshsgAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMyR 160
Cdd:pfam00115  87 SFWLVVLGAVLLLASFG---GATTGWTEYPPL--------VGVDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-R 154
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNtsffdpAGGGDPILYQHLFWFFG 219
Cdd:pfam00115 155 MPLFVWAILATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLFWWFG 207
QoxB TIGR02882
cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type ...
8-219 9.48e-37

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: 135.37  E-value: 9.48e-37
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   8 GACVSMLIRMELAQPGNQLLLGNHqvYNVLITAHAILMIFFLVMPVMIGgFGNWLVPIMIGSPDMAFPRLNNISFWLLPP 87
Cdd:TIGR02882  68 GGIDALLMRAQLTVPDNKFLDAQH--YNEIFTTHGVIMIIFMAMPFIIG-LMNIVVPLQIGARDVAFPVLNALSFWLFFA 144
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  88 SLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYRMPLFVWS 167
Cdd:TIGR02882 145 GAMLFNISFVIGGSPDAGWTNYAPLAGPEFSPGVGVNYYLIALQISGIGTLMTGINFFVTILKMRAPGMKLMQMPMFTWT 224
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|..
gi 2719227361 168 IFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:TIGR02882 225 TLITTLIIIFAFPVLTVALALMTTDRIFDTAFFTVAHGGMPMLWANLFWIWG 276
 
Name Accession Description Interval E-value
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
1-219 1.71e-124

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: 361.03  E-value: 1.71e-124
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNQLllGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:cd01663    14 GLWSGLVGTSLSLLIRLELSQPGSQL--GNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNL 91
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:cd01663    92 SFWLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEK 171
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:cd01663   172 MPLFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 230
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
1-219 1.47e-121

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 354.17  E-value: 1.47e-121
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00153   21 GAWSGMVGTSLSLLIRAELGQPGS--LIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNM 98
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00153   99 SFWLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDR 178
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00153  179 MPLFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFG 237
COX1 MTH00167
cytochrome c oxidase subunit I; Provisional
1-219 7.42e-110

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177222  Cd Length: 512  Bit Score: 324.32  E-value: 7.42e-110
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00167   23 GAWAGMVGTALSLLIRAELSQPGS--LLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00167  101 SFWLLPPSLLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGSINFITTIINMKPPGITQYQ 180
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00167  181 TPLFVWSILVTTILLLLSLPVLAAAITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFG 239
COX1 MTH00116
cytochrome c oxidase subunit I; Provisional
1-219 2.10e-108

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177177  Cd Length: 515  Bit Score: 320.89  E-value: 2.10e-108
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00116   23 GAWAGMVGTALSLLIRAELGQPGT--LLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00116  101 SFWLLPPSFLLLLASSTVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTCINMKPPAMSQYQ 180
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00116  181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFG 239
COX1 MTH00223
cytochrome c oxidase subunit I; Provisional
1-219 2.52e-107

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177260  Cd Length: 512  Bit Score: 318.08  E-value: 2.52e-107
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGnqLLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00223   20 GMWSGLVGTSLSLLIRAELGQPG--ALLGDDQLYNVIVTAHAFVMIFFLVMPMMIGGFGNWLVPLMLGAPDMAFPRLNNM 97
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00223   98 SFWLLPPSLYLLLSSSAVESGVGTGWTVYPPLSSNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTIINMRSPGMQLER 177
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00223  178 LPLFVWSVKVTAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 236
COX1 MTH00142
cytochrome c oxidase subunit I; Provisional
1-219 6.14e-104

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214431  Cd Length: 511  Bit Score: 309.35  E-value: 6.14e-104
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00142   21 GAWAGMVGTGLSLLIRAELGQPGS--LLGDDQLYNVIVTAHAFVMIFFMVMPVMIGGFGNWLVPLMLGAPDMAFPRMNNM 98
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00142   99 SFWLLPPALLLLLSSAAVESGAGTGWTVYPPLSSNLAHSGGSVDLAIFSLHLAGVSSILGAINFITTVINMRAGGMKFER 178
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00142  179 VPLFVWSVKITAILLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 237
COX1 MTH00182
cytochrome c oxidase subunit I; Provisional
1-219 2.75e-99

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214451  Cd Length: 525  Bit Score: 297.89  E-value: 2.75e-99
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00182   25 GAGAGMIGTAFSMLIRLELSAPGA--MLGDDHLYNVIVTAHAFIMIFFLVMPVMIGGFGNWLVPLYIGAPDMAFPRLNNI 102
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00182  103 SFWLLPPALILLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGAVDMAIFSLHLAGVSSILGAINFITTIFNMRAPGVTFNR 182
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00182  183 LPLFVWSILITAFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILFQHLFWFFG 241
COX1 MTH00184
cytochrome c oxidase subunit I; Provisional
1-219 4.96e-98

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177235  Cd Length: 519  Bit Score: 294.43  E-value: 4.96e-98
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00184   25 GAFAGMIGTAFSMLIRLELSAPGS--MLGDDHLYNVIVTAHAFVMIFFLVMPVMIGGFGNWFVPLYIGAPDMAFPRLNNI 102
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00184  103 SFWLLPPALTLLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGSVDMAIFSLHLAGISSILGAMNFITTIFNMRAPGITMDR 182
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00184  183 MPLFVWSILVTTFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLFWFFG 241
COX1 MTH00037
cytochrome c oxidase subunit I; Provisional
1-219 2.00e-95

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177112  Cd Length: 517  Bit Score: 287.88  E-value: 2.00e-95
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00037   23 GAWAGMVGTAMSVIIRTELAQPGS--LLQDDQIYNVIVTAHALVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNM 100
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00037  101 SFWLIPPSFLLLLASAGVESGAGTGWTIYPPLSSNIAHAGGSVDLAIFSLHLAGASSILASINFITTIINMRTPGMTFDR 180
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00037  181 LPLFVWSVFITAFLLLLSLPVLAGAITMLLTDRNINTTFFDPAGGGDPILFQHLFWFFG 239
COX1 MTH00103
cytochrome c oxidase subunit I; Validated
1-219 8.55e-95

cytochrome c oxidase subunit I; Validated


Pssm-ID: 177165  Cd Length: 513  Bit Score: 286.01  E-value: 8.55e-95
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00103   23 GAWAGMVGTALSLLIRAELGQPGT--LLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00103  101 SFWLLPPSFLLLLASSMVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMSQYQ 180
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00103  181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFG 239
COX1 MTH00183
cytochrome c oxidase subunit I; Provisional
1-219 5.03e-94

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177234  Cd Length: 516  Bit Score: 284.12  E-value: 5.03e-94
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00183   23 GAWAGMVGTALSLLIRAELSQPGA--LLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNM 100
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00183  101 SFWLLPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAISQYQ 180
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00183  181 TPLFVWAVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFG 239
COX1 MTH00077
cytochrome c oxidase subunit I; Provisional
1-219 5.54e-94

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214419  Cd Length: 514  Bit Score: 283.76  E-value: 5.54e-94
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00077   23 GAWAGMVGTALSLLIRAELSQPGT--LLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00077  101 SFWLLPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTSINMKPPSMSQYQ 180
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00077  181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPVLYQHLFWFFG 239
COX1 MTH00007
cytochrome c oxidase subunit I; Validated
1-219 2.99e-93

cytochrome c oxidase subunit I; Validated


Pssm-ID: 133649  Cd Length: 511  Bit Score: 281.79  E-value: 2.99e-93
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00007   20 GVWGGLLGTSMSLLIRIELGQPGA--FLGSDQLYNTIVTAHAFLMIFFLVMPVFIGGFGNWLVPLMLGAPDMAFPRLNNM 97
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00007   98 SFWLLPPALILLVSSAAVEKGVGTGWTVYPPLASNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTVINMRWKGLRLER 177
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00007  178 IPLFVWAVVITVVLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFG 236
COX1 MTH00079
cytochrome c oxidase subunit I; Provisional
1-219 7.58e-90

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177148  Cd Length: 508  Bit Score: 273.09  E-value: 7.58e-90
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGnqLLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00079   24 GLWSGMVGTSLSLIIRLELSKPG--LLLGNGQLYNSVITAHAILMIFFMVMPSMIGGFGNWMLPLMLGAPDMSFPRLNNL 101
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSiQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00079  102 SFWLLPTSLFLILDSCFVDMGPGTSWTVYPPLST-LGHPGSSVDLAIFSLHCAGISSILGGINFMVTTKNLRSSSISLEH 180
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00079  181 MSLFVWTVFVTVFLLVLSLPVLAGAITMLLTDRNLNTSFFDPSTGGNPLLYQHLFWFFG 239
COX1 MTH00026
cytochrome c oxidase subunit I; Provisional
1-219 1.36e-88

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 164599  Cd Length: 534  Bit Score: 270.73  E-value: 1.36e-88
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNqlLLGNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00026   24 GALSGAIGTAFSMLIRLELSSPGS--MLGDDHLYNVIVTAHAFVMIFFLVMPTMIGGFGNWFVPLMIGAPDMAFPRLNNI 101
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:MTH00026  102 SFWLLPPALFLLLGSSLVEQGAGTGWTVYPPLASIQAHSGGSVDMAIFSLHLAGLSSILGAMNFITTVMNMRTPGMTMSR 181
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00026  182 IPLFVWSVFITAILLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLFWFFG 240
Heme_Cu_Oxidase_I cd00919
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
1-219 6.39e-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: 243.59  E-value: 6.39e-79
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNQLLlgNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPiMIGSPDMAFPRLNNI 80
Cdd:cd00919    12 AFVALLLGGLLALLIRLELATPGSLFL--DPQLYNQLVTAHGVIMIFFFVMPAIFGGFGNLLPP-LIGARDLAFPRLNNL 88
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYR 160
Cdd:cd00919    89 SFWLFPPGLLLLLSSVLVGGGAGTGWTFYPPLSTLSYSSGVGVDLAILGLHLAGVSSILGAINFITTILNMRAPGMTLDK 168
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:cd00919   169 MPLFVWSVLVTAILLLLALPVLAAALVMLLLDRNFGTSFFDPAGGGDPVLYQHLFWFFG 227
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
3-219 4.07e-74

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 233.10  E-value: 4.07e-74
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   3 FSGVLGACVSMLIRMELAQPGNQLLLGNHqvYNVLITAHAILMIFFLVMPvMIGGFGNWLVPIMIGSPDMAFPRLNNISF 82
Cdd:COG0843    28 VFLLIGGLLALLMRLQLAGPGLGLLSPET--YNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNALSF 104
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  83 WLLPPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYRMP 162
Cdd:COG0843   105 WLYLFGGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMP 184
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*..
gi 2719227361 163 LFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:COG0843   185 LFTWAALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLFWFFG 241
Ubiquinol_Oxidase_I cd01662
Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory ...
6-219 7.71e-63

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: 203.20  E-value: 7.71e-63
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   6 VLGACVSMLIRMELAQPGNQLLLGNHqvYNVLITAHAILMIFFLVMPVMIGgFGNWLVPIMIGSPDMAFPRLNNISFWLL 85
Cdd:cd01662    23 LRGGVDALLMRTQLALPGNDFLSPEH--YNQIFTMHGTIMIFLFAMPLVFG-LMNYLVPLQIGARDVAFPRLNALSFWLF 99
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  86 PPSLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYRMPLFV 165
Cdd:cd01662   100 LFGGLLLNASLLIGGFPDAGWFAYPPLSGLEYSPGVGVDYWILGLQFSGIGTLLGAINFIVTILKMRAPGMTLMRMPIFT 179
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....
gi 2719227361 166 WSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:cd01662   180 WTTLVTSILILFAFPVLTAALALLELDRYFGTHFFTNALGGNPMLWQHLFWIFG 233
COX1 MTH00048
cytochrome c oxidase subunit I; Provisional
1-219 4.80e-61

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177123  Cd Length: 511  Bit Score: 198.75  E-value: 4.80e-61
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNQLLlgNHQVYNVLITAHAILMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:MTH00048   24 GVWSGFVGLSLSLLIRLNFLDPYYNVI--SLDVYNFLITNHGIIMIFFFLMPVLIGGFGNYLLPLLLGLSDLNLPRLNAL 101
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLVevGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSmYR 160
Cdd:MTH00048  102 SAWLLVPSIVFLLLSMCL--GAGVGWTFYPPLSSSLFSSSWGVDFLMFSLHLAGVSSLFGSINFICTIYSAFMTNVF-SR 178
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:MTH00048  179 TSIILWSYLFTSILLLLSLPVLAAAITMLLFDRNFGSAFFDPLGGGDPVLFQHMFWFFG 237
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
1-219 2.62e-45

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: 155.81  E-value: 2.62e-45
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   1 GAFSGVLGACVSMLIRMELAQPGNQLLlgNHQVYNVLITAHAILMIFFLVMPvMIGGFGNWLVPIMIGSPDMAFPRLNNI 80
Cdd:pfam00115  10 ALVWFLVGGLLGLLIRLQLAFPGLNFL--SPLTYNQLRTLHGNLMIFWFATP-FLFGFGNYLVPLMIGARDMAFPRLNAL 86
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  81 SFWLLPPSLCLLLVSSLvevGVGTGWTVYPPLssiqshsgAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMyR 160
Cdd:pfam00115  87 SFWLVVLGAVLLLASFG---GATTGWTEYPPL--------VGVDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-R 154
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 2719227361 161 MPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNtsffdpAGGGDPILYQHLFWFFG 219
Cdd:pfam00115 155 MPLFVWAILATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLFWWFG 207
QoxB TIGR02882
cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type ...
8-219 9.48e-37

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: 135.37  E-value: 9.48e-37
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361   8 GACVSMLIRMELAQPGNQLLLGNHqvYNVLITAHAILMIFFLVMPVMIGgFGNWLVPIMIGSPDMAFPRLNNISFWLLPP 87
Cdd:TIGR02882  68 GGIDALLMRAQLTVPDNKFLDAQH--YNEIFTTHGVIMIIFMAMPFIIG-LMNIVVPLQIGARDVAFPVLNALSFWLFFA 144
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  88 SLCLLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYRMPLFVWS 167
Cdd:TIGR02882 145 GAMLFNISFVIGGSPDAGWTNYAPLAGPEFSPGVGVNYYLIALQISGIGTLMTGINFFVTILKMRAPGMKLMQMPMFTWT 224
                         170       180       190       200       210
                  ....*....|....*....|....*....|....*....|....*....|..
gi 2719227361 168 IFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:TIGR02882 225 TLITTLIIIFAFPVLTVALALMTTDRIFDTAFFTVAHGGMPMLWANLFWIWG 276
PRK15017 PRK15017
cytochrome o ubiquinol oxidase subunit I; Provisional
11-219 1.68e-36

cytochrome o ubiquinol oxidase subunit I; Provisional


Pssm-ID: 184978  Cd Length: 663  Bit Score: 135.06  E-value: 1.68e-36
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  11 VSMLIRMELAQPGNQLLLGNHQvYNVLITAHAILMIFFLVMPVMIGgFGNWLVPIMIGSPDMAFPRLNNISFWLLPPSLC 90
Cdd:PRK15017   77 IMMRSQQALASAGEAGFLPPHH-YDQIFTAHGVIMIFFVAMPFVIG-LMNLVVPLQIGARDVAFPFLNNLSFWFTVVGVI 154
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2719227361  91 LLLVSSLVEVGVGTGWTVYPPLSSIQSHSGAAVDLAIFSLHLSGAASILGAVNFISTILNMRNPGQSMYRMPLFVWSIFV 170
Cdd:PRK15017  155 LVNVSLGVGEFAQTGWLAYPPLSGIEYSPGVGVDYWIWSLQLSGIGTTLTGINFFVTILKMRAPGMTMFKMPVFTWASLC 234
                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*....
gi 2719227361 171 TAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFG 219
Cdd:PRK15017  235 ANVLIIASFPILTVTVALLTLDRYLGTHFFTNDMGGNMMMYINLIWAWG 283
 
Blast search parameters
Data Source: Live blast search RID = KMMXME72016
User Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01   Maximum number of hits: 500

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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