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Conserved domains on  [gi|1778521148|gb|QGP73334|]
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cytochrome oxidase subunit 1, partial (mitochondrion) [Conura sp. BC ZSM HYM-27511-H06]

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 ...
 1-201 8.08e-110

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: 323.36  E-value: 8.08e-110
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:MTH00153   22 AWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFW 101

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINM--NLFKMEMVSL 158
Cdd:MTH00153  102 LLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMrsKGMTLDRMPL 181

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00153  182 FVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGG 224
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-201 8.08e-110

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 323.36  E-value: 8.08e-110
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:MTH00153   22 AWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFW 101

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINM--NLFKMEMVSL 158
Cdd:MTH00153  102 LLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMrsKGMTLDRMPL 181

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00153  182 FVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGG 224
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-201 2.58e-105

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: 311.34  E-value: 2.58e-105
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:cd01663    15 LWSGLVGTSLSLLIRLELSQPGSQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNLSFW 94

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKM--EMVSL 158
Cdd:cd01663    95 LLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMtlEKMPL 174

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:cd01663   175 FVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGG 217
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
3-201 1.00e-54

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 181.86  E-value: 1.00e-54
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   3 AGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPvMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWLL 82
Cdd:COG0843    29 FLLIGGLLALLMRLQLAGPGLGLLSPETYNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNALSFWLY 107

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  83 IPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIIN-----MNLFKMemvS 157
Cdd:COG0843   108 LFGGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKmrapgMTLMRM---P 184

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....
gi 1778521148 158 LFSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:COG0843   185 LFTWAALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGG 228
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-198 1.34e-32

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


Pssm-ID: 459678  Cd Length: 432  Bit Score: 121.14  E-value: 1.34e-32
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGgFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:pfam00115  11 LVWFLVGGLLGLLIRLQLAFPGLNFLSPLTYNQLRTLHGNLMIFWFATPFLFG-FGNYLVPLMIGARDMAFPRLNALSFW 89

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMfigMGTGTGWTVYPPLslnishssVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEM-VSLF 159
Cdd:pfam00115  90 LVVLGAVLLLASF---GGATTGWTEYPPL--------VGVDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTLrMPLF 158

                         170       180       190
                  ....*....|....*....|....*....|....*....
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPA 198
Cdd:pfam00115 159 VWAILATAILILLAFPVLAAALLLLLLDRSLGAGGGDPL 197
QoxB TIGR02882
cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type ...
 11-201 3.47e-26

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: 104.94  E-value: 3.47e-26
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  11 SMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGgFGNYLIPLMLGVPDMAFPRMNNMSFWLLIPSLFLLM 90
Cdd:TIGR02882  72 ALLMRAQLTVPDNKFLDAQHYNEIFTTHGVIMIIFMAMPFIIG-LMNIVVPLQIGARDVAFPVLNALSFWLFFAGAMLFN 150

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  91 MSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEMVS--LFSWSLLLTAI 168
Cdd:TIGR02882 151 ISFVIGGSPDAGWTNYAPLAGPEFSPGVGVNYYLIALQISGIGTLMTGINFFVTILKMRAPGMKLMQmpMFTWTTLITTL 230

                         170       180       190
                  ....*....|....*....|....*....|...
gi 1778521148 169 LLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:TIGR02882 231 IIIFAFPVLTVALALMTTDRIFDTAFFTVAHGG 263
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-201 8.08e-110

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 323.36  E-value: 8.08e-110
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:MTH00153   22 AWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNMSFW 101

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINM--NLFKMEMVSL 158
Cdd:MTH00153  102 LLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMrsKGMTLDRMPL 181

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00153  182 FVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGG 224
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-201 2.58e-105

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: 311.34  E-value: 2.58e-105
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:cd01663    15 LWSGLVGTSLSLLIRLELSQPGSQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNLSFW 94

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKM--EMVSL 158
Cdd:cd01663    95 LLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMtlEKMPL 174

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:cd01663   175 FVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGG 217
COX1 MTH00167
cytochrome c oxidase subunit I; Provisional
 2-201 8.95e-98

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177222  Cd Length: 512  Bit Score: 292.74  E-value: 8.95e-98
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   2 WAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWL 81
Cdd:MTH00167   25 WAGMVGTALSLLIRAELSQPGSLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWL 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  82 LIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNL--FKMEMVSLF 159
Cdd:MTH00167  105 LPPSLLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGSINFITTIINMKPpgITQYQTPLF 184

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00167  185 VWSILVTTILLLLSLPVLAAAITMLLTDRNLNTTFFDPAGGG 226
COX1 MTH00223
cytochrome c oxidase subunit I; Provisional
 1-201 9.66e-94

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177260  Cd Length: 512  Bit Score: 282.25  E-value: 9.66e-94
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:MTH00223   21 MWSGLVGTSLSLLIRAELGQPGALLGDDQLYNVIVTAHAFVMIFFLVMPMMIGGFGNWLVPLMLGAPDMAFPRLNNMSFW 100

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNL--FKMEMVSL 158
Cdd:MTH00223  101 LLPPSLYLLLSSSAVESGVGTGWTVYPPLSSNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTIINMRSpgMQLERLPL 180

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00223  181 FVWSVKVTAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGG 223
COX1 MTH00116
cytochrome c oxidase subunit I; Provisional
 2-201 7.30e-92

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177177  Cd Length: 515  Bit Score: 277.74  E-value: 7.30e-92
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   2 WAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWL 81
Cdd:MTH00116   25 WAGMVGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWL 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  82 LIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEM--VSLF 159
Cdd:MTH00116  105 LPPSFLLLLASSTVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTCINMKPPAMSQyqTPLF 184

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00116  185 VWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGG 226
COX1 MTH00142
cytochrome c oxidase subunit I; Provisional
 1-201 2.79e-91

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214431  Cd Length: 511  Bit Score: 276.22  E-value: 2.79e-91
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:MTH00142   22 AWAGMVGTGLSLLIRAELGQPGSLLGDDQLYNVIVTAHAFVMIFFMVMPVMIGGFGNWLVPLMLGAPDMAFPRMNNMSFW 101

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINM--NLFKMEMVSL 158
Cdd:MTH00142  102 LLPPALLLLLSSAAVESGAGTGWTVYPPLSSNLAHSGGSVDLAIFSLHLAGVSSILGAINFITTVINMraGGMKFERVPL 181

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00142  182 FVWSVKITAILLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGG 224
COX1 MTH00007
cytochrome c oxidase subunit I; Validated
 2-201 3.62e-82

cytochrome c oxidase subunit I; Validated


Pssm-ID: 133649  Cd Length: 511  Bit Score: 252.52  E-value: 3.62e-82
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   2 WAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWL 81
Cdd:MTH00007   22 WGGLLGTSMSLLIRIELGQPGAFLGSDQLYNTIVTAHAFLMIFFLVMPVFIGGFGNWLVPLMLGAPDMAFPRLNNMSFWL 101

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  82 LIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNL--FKMEMVSLF 159
Cdd:MTH00007  102 LPPALILLVSSAAVEKGVGTGWTVYPPLASNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTVINMRWkgLRLERIPLF 181

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00007  182 VWAVVITVVLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGG 223
COX1 MTH00103
cytochrome c oxidase subunit I; Validated
 2-201 9.34e-81

cytochrome c oxidase subunit I; Validated


Pssm-ID: 177165  Cd Length: 513  Bit Score: 249.03  E-value: 9.34e-81
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   2 WAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWL 81
Cdd:MTH00103   25 WAGMVGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWL 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  82 LIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEM--VSLF 159
Cdd:MTH00103  105 LPPSFLLLLASSMVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMSQyqTPLF 184

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00103  185 VWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGG 226
COX1 MTH00183
cytochrome c oxidase subunit I; Provisional
 2-201 4.50e-80

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177234  Cd Length: 516  Bit Score: 247.53  E-value: 4.50e-80
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   2 WAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWL 81
Cdd:MTH00183   25 WAGMVGTALSLLIRAELSQPGALLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNMSFWL 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  82 LIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEM--VSLF 159
Cdd:MTH00183  105 LPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAISQyqTPLF 184

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00183  185 VWAVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGG 226
COX1 MTH00077
cytochrome c oxidase subunit I; Provisional
 2-201 1.20e-79

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214419  Cd Length: 514  Bit Score: 246.39  E-value: 1.20e-79
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   2 WAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWL 81
Cdd:MTH00077   25 WAGMVGTALSLLIRAELSQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWL 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  82 LIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEM--VSLF 159
Cdd:MTH00077  105 LPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTSINMKPPSMSQyqTPLF 184

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00077  185 VWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGG 226
COX1 MTH00037
cytochrome c oxidase subunit I; Provisional
 2-201 2.87e-79

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177112  Cd Length: 517  Bit Score: 245.51  E-value: 2.87e-79
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   2 WAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWL 81
Cdd:MTH00037   25 WAGMVGTAMSVIIRTELAQPGSLLQDDQIYNVIVTAHALVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNMSFWL 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  82 LIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEM--VSLF 159
Cdd:MTH00037  105 IPPSFLLLLASAGVESGAGTGWTIYPPLSSNIAHAGGSVDLAIFSLHLAGASSILASINFITTIINMRTPGMTFdrLPLF 184

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00037  185 VWSVFITAFLLLLSLPVLAGAITMLLTDRNINTTFFDPAGGG 226
COX1 MTH00079
cytochrome c oxidase subunit I; Provisional
 1-201 8.84e-75

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177148  Cd Length: 508  Bit Score: 233.42  E-value: 8.84e-75
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:MTH00079   25 LWSGMVGTSLSLIIRLELSKPGLLLGNGQLYNSVITAHAILMIFFMVMPSMIGGFGNWMLPLMLGAPDMSFPRLNNLSFW 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSlNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINM--NLFKMEMVSL 158
Cdd:MTH00079  105 LLPTSLFLILDSCFVDMGPGTSWTVYPPLS-TLGHPGSSVDLAIFSLHCAGISSILGGINFMVTTKNLrsSSISLEHMSL 183

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00079  184 FVWTVFVTVFLLVLSLPVLAGAITMLLTDRNLNTSFFDPSTGG 226
COX1 MTH00184
cytochrome c oxidase subunit I; Provisional
 2-201 4.09e-74

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177235  Cd Length: 519  Bit Score: 232.02  E-value: 4.09e-74
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   2 WAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWL 81
Cdd:MTH00184   27 FAGMIGTAFSMLIRLELSAPGSMLGDDHLYNVIVTAHAFVMIFFLVMPVMIGGFGNWFVPLYIGAPDMAFPRLNNISFWL 106

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  82 LIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNL--FKMEMVSLF 159
Cdd:MTH00184  107 LPPALTLLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGSVDMAIFSLHLAGISSILGAMNFITTIFNMRApgITMDRMPLF 186

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00184  187 VWSILVTTFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGG 228
COX1 MTH00182
cytochrome c oxidase subunit I; Provisional
 3-201 2.57e-73

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214451  Cd Length: 525  Bit Score: 230.09  E-value: 2.57e-73
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   3 AGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWLL 82
Cdd:MTH00182   28 AGMIGTAFSMLIRLELSAPGAMLGDDHLYNVIVTAHAFIMIFFLVMPVMIGGFGNWLVPLYIGAPDMAFPRLNNISFWLL 107

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  83 IPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNL--FKMEMVSLFS 160
Cdd:MTH00182  108 PPALILLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGAVDMAIFSLHLAGVSSILGAINFITTIFNMRApgVTFNRLPLFV 187

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|.
gi 1778521148 161 WSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00182  188 WSILITAFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGG 228
COX1 MTH00026
cytochrome c oxidase subunit I; Provisional
 3-201 2.73e-66

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 164599  Cd Length: 534  Bit Score: 212.18  E-value: 2.73e-66
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   3 AGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWLL 82
Cdd:MTH00026   27 SGAIGTAFSMLIRLELSSPGSMLGDDHLYNVIVTAHAFVMIFFLVMPTMIGGFGNWFVPLMIGAPDMAFPRLNNISFWLL 106

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  83 IPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEM--VSLFS 160
Cdd:MTH00026  107 PPALFLLLGSSLVEQGAGTGWTVYPPLASIQAHSGGSVDMAIFSLHLAGLSSILGAMNFITTVMNMRTPGMTMsrIPLFV 186

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|.
gi 1778521148 161 WSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00026  187 WSVFITAILLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGG 227
Heme_Cu_Oxidase_I cd00919
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
 1-201 7.11e-63

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: 201.61  E-value: 7.11e-63
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPlMLGVPDMAFPRMNNMSFW 80
Cdd:cd00919    13 FVALLLGGLLALLIRLELATPGSLFLDPQLYNQLVTAHGVIMIFFFVMPAIFGGFGNLLPP-LIGARDLAFPRLNNLSFW 91

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINM--NLFKMEMVSL 158
Cdd:cd00919    92 LFPPGLLLLLSSVLVGGGAGTGWTFYPPLSTLSYSSGVGVDLAILGLHLAGVSSILGAINFITTILNMraPGMTLDKMPL 171

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:cd00919   172 FVWSVLVTAILLLLALPVLAAALVMLLLDRNFGTSFFDPAGGG 214
COX1 MTH00048
cytochrome c oxidase subunit I; Provisional
 1-201 5.25e-60

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177123  Cd Length: 511  Bit Score: 195.28  E-value: 5.25e-60
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGGFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:MTH00048   25 VWSGFVGLSLSLLIRLNFLDPYYNVISLDVYNFLITNHGIIMIFFFLMPVLIGGFGNYLLPLLLGLSDLNLPRLNALSAW 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMFigMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKM-EMVSLF 159
Cdd:MTH00048  105 LLVPSIVFLLLSMC--LGAGVGWTFYPPLSSSLFSSSWGVDFLMFSLHLAGVSSLFGSINFICTIYSAFMTNVfSRTSII 182

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|..
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:MTH00048  183 LWSYLFTSILLLLSLPVLAAAITMLLFDRNFGSAFFDPLGGG 224
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
3-201 1.00e-54

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 181.86  E-value: 1.00e-54
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   3 AGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPvMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWLL 82
Cdd:COG0843    29 FLLIGGLLALLMRLQLAGPGLGLLSPETYNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNALSFWLY 107

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  83 IPSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIIN-----MNLFKMemvS 157
Cdd:COG0843   108 LFGGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKmrapgMTLMRM---P 184

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....
gi 1778521148 158 LFSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:COG0843   185 LFTWAALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGG 228
Ubiquinol_Oxidase_I cd01662
Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory ...
 5-201 2.85e-42

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: 148.11  E-value: 2.85e-42
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   5 LVGLSLSMIIRMELGTP-GSLIGNDQiYNSVVTAHAFVMIFFFVMPvMMGGFGNYLIPLMLGVPDMAFPRMNNMSFWLLI 83
Cdd:cd01662    23 LRGGVDALLMRTQLALPgNDFLSPEH-YNQIFTMHGTIMIFLFAMP-LVFGLMNYLVPLQIGARDVAFPRLNALSFWLFL 100

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  84 PSLFLLMMSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIIN-----MNLFKMemvSL 158
Cdd:cd01662   101 FGGLLLNASLLIGGFPDAGWFAYPPLSGLEYSPGVGVDYWILGLQFSGIGTLLGAINFIVTILKmrapgMTLMRM---PI 177

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|...
gi 1778521148 159 FSWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:cd01662   178 FTWTTLVTSILILFAFPVLTAALALLELDRYFGTHFFTNALGG 220
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-198 1.34e-32

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


Pssm-ID: 459678  Cd Length: 432  Bit Score: 121.14  E-value: 1.34e-32
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148   1 LWAGLVGLSLSMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGgFGNYLIPLMLGVPDMAFPRMNNMSFW 80
Cdd:pfam00115  11 LVWFLVGGLLGLLIRLQLAFPGLNFLSPLTYNQLRTLHGNLMIFWFATPFLFG-FGNYLVPLMIGARDMAFPRLNALSFW 89

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  81 LLIPSLFLLMMSMfigMGTGTGWTVYPPLslnishssVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEM-VSLF 159
Cdd:pfam00115  90 LVVLGAVLLLASF---GGATTGWTEYPPL--------VGVDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTLrMPLF 158

                         170       180       190
                  ....*....|....*....|....*....|....*....
gi 1778521148 160 SWSLLLTAILLLLSLPVLAGAITMLLFDRNLNTSFFDPA 198
Cdd:pfam00115 159 VWAILATAILILLAFPVLAAALLLLLLDRSLGAGGGDPL 197
QoxB TIGR02882
cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type ...
 11-201 3.47e-26

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: 104.94  E-value: 3.47e-26
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  11 SMIIRMELGTPGSLIGNDQIYNSVVTAHAFVMIFFFVMPVMMGgFGNYLIPLMLGVPDMAFPRMNNMSFWLLIPSLFLLM 90
Cdd:TIGR02882  72 ALLMRAQLTVPDNKFLDAQHYNEIFTTHGVIMIIFMAMPFIIG-LMNIVVPLQIGARDVAFPVLNALSFWLFFAGAMLFN 150

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  91 MSMFIGMGTGTGWTVYPPLSLNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEMVS--LFSWSLLLTAI 168
Cdd:TIGR02882 151 ISFVIGGSPDAGWTNYAPLAGPEFSPGVGVNYYLIALQISGIGTLMTGINFFVTILKMRAPGMKLMQmpMFTWTTLITTL 230

                         170       180       190
                  ....*....|....*....|....*....|...
gi 1778521148 169 LLLLSLPVLAGAITMLLFDRNLNTSFFDPAGGG 201
Cdd:TIGR02882 231 IIIFAFPVLTVALALMTTDRIFDTAFFTVAHGG 263
PRK15017 PRK15017
cytochrome o ubiquinol oxidase subunit I; Provisional
 31-201 3.82e-26

cytochrome o ubiquinol oxidase subunit I; Provisional


Pssm-ID: 184978  Cd Length: 663  Bit Score: 104.63  E-value: 3.82e-26
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148  31 YNSVVTAHAFVMIFFFVMPVMMGgFGNYLIPLMLGVPDMAFPRMNNMSFWLLIPSLFLLMMSMFIGMGTGTGWTVYPPLS 110
Cdd:PRK15017   99 YDQIFTAHGVIMIFFVAMPFVIG-LMNLVVPLQIGARDVAFPFLNNLSFWFTVVGVILVNVSLGVGEFAQTGWLAYPPLS 177

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1778521148 111 LNISHSSVSVDLSIFSLHIAGISSIMGSINFISTIINMNLFKMEMVSL--FSWSLLLTAILLLLSLPVLAGAITMLLFDR 188
Cdd:PRK15017  178 GIEYSPGVGVDYWIWSLQLSGIGTTLTGINFFVTILKMRAPGMTMFKMpvFTWASLCANVLIIASFPILTVTVALLTLDR 257

                         170
                  ....*....|...
gi 1778521148 189 NLNTSFFDPAGGG 201
Cdd:PRK15017  258 YLGTHFFTNDMGG 270
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

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