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Conserved domains on  [gi|37780867|gb|AAP32446|]
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cytochrome oxidase subunit I, partial (mitochondrion) [Amazona ochrocephala panamensis]

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 ...
 1-207 6.66e-151

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: 428.13  E-value: 6.66e-151
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00153 231 HLFWFFGHPEVYILILPGFGMISHIISQESGKKETFGTLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMII 310

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00153 311 AVPTGIKIFSWLATLHGSQINYSPSLLWALGFVFLFTIGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMGG 390

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00153 391 FIHWFPLFTGLTMNPKWLKIQFFIMFIGVNLTFFPQHFLGLAGMPRR 437
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-207 6.66e-151

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 428.13  E-value: 6.66e-151
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00153 231 HLFWFFGHPEVYILILPGFGMISHIISQESGKKETFGTLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMII 310

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00153 311 AVPTGIKIFSWLATLHGSQINYSPSLLWALGFVFLFTIGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMGG 390

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00153 391 FIHWFPLFTGLTMNPKWLKIQFFIMFIGVNLTFFPQHFLGLAGMPRR 437
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-207 8.98e-149

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: 421.89  E-value: 8.98e-149
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:cd01663 224 HLFWFFGHPEVYILILPGFGIISHIISTFSGKKPVFGYLGMVYAMLSIGILGFIVWAHHMFTVGLDVDTRAYFTAATMII 303

                        90       100       110       120       130       140       150       160
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867  81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:cd01663 304 AVPTGIKVFSWLATMWGGSIKFETPMLWALGFIFLFTIGGLTGVVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAIFAG 383

                       170       180       190       200
                ....*....|....*....|....*....|....*....|....*..
gi 37780867 161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:cd01663 384 FYYWFPKITGLSYNETLGKIHFWLMFIGVNLTFFPQHFLGLAGMPRR 430
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
1-207 3.63e-100

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 299.74  E-value: 3.63e-100
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKePFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:COG0843 235 HLFWFFGHPEVYILILPAFGIVSEIIPTFSRKP-LFGYKAMVLATVAIAFLSFLVWAHHMFTPGISPLVKAFFSIATMLI 313

                        90       100       110       120       130       140       150       160
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867  81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:COG0843 314 AVPTGVKVFNWIATMWRGRIRFTTPMLFALGFIILFVIGGLTGVMLASVPLDYQVHDTYFVVAHFHYVLIGGVVFAFFAG 393

                       170       180       190       200
                ....*....|....*....|....*....|....*....|....*..
gi 37780867 161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:COG0843 394 LYYWFPKMTGRMLNERLGKIHFWLWFIGFNLTFFPMHILGLLGMPRR 440
CtaD_CoxA TIGR02891
cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) ...
 1-207 1.31e-98

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


Pssm-ID: 213748  Cd Length: 499  Bit Score: 294.52  E-value: 1.31e-98
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867     1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKePFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:TIGR02891 226 HLFWFFGHPEVYIIFLPAFGIISEILPTFARKP-IFGYRAMVYATVAIGFLSFGVWAHHMFTTGMPPLALAFFSAATMLI 304

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:TIGR02891 305 AVPTGVKVFNWIATLWGGSIRFTTPMLFALGFIFLFVIGGLTGVMLASVPLDWQLHDTYFVVAHFHYVLVGGSVFAIFAA 384

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*..
gi 37780867   161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:TIGR02891 385 IYYWFPKVTGRMYNERLGRWHFWLTFVGFNLTFFPMHLLGLLGMPRR 431
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-207 1.70e-71

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: 223.22  E-value: 1.70e-71
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867     1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKePFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:pfam00115 201 HLFWWFGHPEVYILILPAFGIIYYILPKFAGRP-LFGYKLSVLAFWLIAFLGFLVWAHHLFTTGLPPWLQALFSVFSMLI 279

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    81 AIPTGIKVFSWLATLHGGTIKW-DPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILA 159
Cdd:pfam00115 280 AVPSGVKVFNWLATLWGGWIRFrTTPMLFFLGFAFLFIIGGLTGVMLALPPVNYYVHDTYFVVAHFHYVLFGGVVFALFG 359

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*...
gi 37780867   160 GLTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:pfam00115 360 GIYYWLPKLTGRMYSEKLGKLHFWLLFIGFNLTFFPMHILGLLGMPRR 407
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-207 6.66e-151

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 428.13  E-value: 6.66e-151
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00153 231 HLFWFFGHPEVYILILPGFGMISHIISQESGKKETFGTLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMII 310

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00153 311 AVPTGIKIFSWLATLHGSQINYSPSLLWALGFVFLFTIGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMGG 390

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00153 391 FIHWFPLFTGLTMNPKWLKIQFFIMFIGVNLTFFPQHFLGLAGMPRR 437
COX1 MTH00116
cytochrome c oxidase subunit I; Provisional
 1-207 7.48e-149

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177177  Cd Length: 515  Bit Score: 423.35  E-value: 7.48e-149
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00116 233 HLFWFFGHPEVYILILPGFGIISHIVTYYAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 312

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00116 313 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMAG 392

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00116 393 FTHWFPLFTGYTLHQTWTKAQFGVMFTGVNLTFFPQHFLGLAGMPRR 439
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-207 8.98e-149

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: 421.89  E-value: 8.98e-149
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:cd01663 224 HLFWFFGHPEVYILILPGFGIISHIISTFSGKKPVFGYLGMVYAMLSIGILGFIVWAHHMFTVGLDVDTRAYFTAATMII 303

                        90       100       110       120       130       140       150       160
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867  81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:cd01663 304 AVPTGIKVFSWLATMWGGSIKFETPMLWALGFIFLFTIGGLTGVVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAIFAG 383

                       170       180       190       200
                ....*....|....*....|....*....|....*....|....*..
gi 37780867 161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:cd01663 384 FYYWFPKITGLSYNETLGKIHFWLMFIGVNLTFFPQHFLGLAGMPRR 430
COX1 MTH00167
cytochrome c oxidase subunit I; Provisional
 1-207 3.44e-144

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177222  Cd Length: 512  Bit Score: 411.38  E-value: 3.44e-144
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00167 233 HLFWFFGHPEVYILILPGFGMISHIVVYYSGKKEPFGYMGMVWAMMAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMII 312

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00167 313 AVPTGIKVFSWLATLHGGKIKWETPMLWALGFIFLFTVGGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMAG 392

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00167 393 FTHWFPLFTGLTLNETWTKIHFFVMFIGVNLTFFPQHFLGLAGMPRR 439
COX1 MTH00223
cytochrome c oxidase subunit I; Provisional
 1-207 5.21e-134

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177260  Cd Length: 512  Bit Score: 385.48  E-value: 5.21e-134
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00223 230 HLFWFFGHPEVYILILPGFGMISHIVSHYSSKKEVFGTLGMIYAMLSIGVLGFIVWAHHMFTVGMDVDTRAYFTAATMII 309

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00223 310 AVPTGIKVFSWLATIYGSKIKYEAPMLWALGFIFLFTVGGLTGIILSNSSLDIMLHDTYYVVAHFHYVLSMGAVFALFAG 389

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00223 390 FNHWFPLFTGVTLHRRWAKAHFFLMFLGVNLTFFPQHFLGLAGMPRR 436
COX1 MTH00142
cytochrome c oxidase subunit I; Provisional
 1-207 5.51e-130

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214431  Cd Length: 511  Bit Score: 375.22  E-value: 5.51e-130
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00142 231 HLFWFFGHPEVYILILPGFGMISHIINHYSGKKEVFGTLGMIYAMLSIGLLGFIVWAHHMFTVGMDVDTRAYFTAATMVI 310

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00142 311 AVPTGIKVFSWLATLHGSKVKYEPPMLWALGFIFLFTVGGLTGIVLANSSLDVVLHDTYYVVAHFHYVLSMGAVFALFAG 390

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00142 391 FIHWFPLFTGLTLNPRWLKAHFYTMFIGVNLTFFPQHFLGLAGMPRR 437
COX1 MTH00103
cytochrome c oxidase subunit I; Validated
 1-207 1.07e-129

cytochrome c oxidase subunit I; Validated


Pssm-ID: 177165  Cd Length: 513  Bit Score: 374.60  E-value: 1.07e-129
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00103 233 HLFWFFGHPEVYILILPGFGMISHIVTYYSGKKEPFGYMGMVWAMMSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 312

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00103 313 AIPTGVKVFSWLATLHGGNIKWSPAMLWALGFIFLFTVGGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMGG 392

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00103 393 FVHWFPLFSGYTLNDTWAKIHFTIMFVGVNMTFFPQHFLGLSGMPRR 439
COX1 MTH00183
cytochrome c oxidase subunit I; Provisional
 1-207 4.51e-128

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177234  Cd Length: 516  Bit Score: 370.41  E-value: 4.51e-128
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00183 233 HLFWFFGHPEVYILILPGFGMISHIVAYYSGKKEPFGYMGMVWAMMAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMII 312

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00183 313 AIPTGVKVFSWLATLHGGSIKWETPLLWALGFIFLFTVGGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMAA 392

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00183 393 FVHWFPLFSGYTLHSTWTKIHFGVMFVGVNLTFFPQHFLGLAGMPRR 439
COX1 MTH00077
cytochrome c oxidase subunit I; Provisional
 1-207 6.20e-128

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214419  Cd Length: 514  Bit Score: 370.04  E-value: 6.20e-128
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00077 233 HLFWFFGHPEVYILILPGFGMISHIVTYYSAKKEPFGYMGMVWAMMSIGLLGFIVWAHHMFTVDLNVDTRAYFTSATMII 312

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00077 313 AIPTGVKVFSWLATMHGGAIKWDAAMLWALGFIFLFTVGGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMGG 392

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00077 393 FVHWFPLFSGYTLHSTWSKIHFGVMFIGVNLTFFPQHFLGLAGMPRR 439
COX1 MTH00037
cytochrome c oxidase subunit I; Provisional
 1-207 4.25e-120

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177112  Cd Length: 517  Bit Score: 350.28  E-value: 4.25e-120
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00037 233 HLFWFFGHPEVYILILPGFGMISHVIAHYSGKQEPFGYLGMVYAMIAIGILGFLVWAHHMFTVGMDVDTRAYFTAATMII 312

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00037 313 AVPTGIKVFSWMATLQGSNLRWETPLLWALGFVFLFTIGGLTGIVLANSSIDVVLHDTYYVVAHFHYVLSMGAVFAIFAG 392

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00037 393 FTHWFPLFSGVSLHPLWSKVHFFLMFIGVNLTFFPQHFLGLAGMPRR 439
COX1 MTH00007
cytochrome c oxidase subunit I; Validated
 1-207 4.87e-116

cytochrome c oxidase subunit I; Validated


Pssm-ID: 133649  Cd Length: 511  Bit Score: 339.57  E-value: 4.87e-116
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00007 230 HLFWFFGHPEVYILILPGFGAISHIVTHYAGKLEPFGTLGMIYAMLGIGVLGFIVWAHHMFTVGMDVDTRAYFTAATMII 309

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00007 310 AVPTGIKVFSWLATIHGSPIKYETPMLWALGFIFLFTTGGLTGIVLSNSSLDIILHDTYYVVAHFHYVLSMGAVFAIFAA 389

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00007 390 FNHWFPLFTGLTLHDRWAKAHFFLMFLGVNLTFFPQHFLGLSGMPRR 436
COX1 MTH00079
cytochrome c oxidase subunit I; Provisional
 1-207 1.81e-108

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177148  Cd Length: 508  Bit Score: 320.09  E-value: 1.81e-108
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00079 233 HLFWFFGHPEVYILILPAFGIISQSTLYLTGKKEVFGSLGMVYAILSIGLIGCVVWAHHMYTVGMDLDSRAYFTAATMVI 312

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00079 313 AVPTGVKVFSWLATLFGMKMKFQPLLLWVLGFIFLFTIGGLTGVILSNSSLDIILHDTYYVVSHFHYVLSLGAVFGIFTG 392

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00079 393 ISLWWPFMTGIVYDKLMMSAVFFLMFVGVNLTFFPLHFAGLHGMPRK 439
COX1 MTH00182
cytochrome c oxidase subunit I; Provisional
 1-207 8.89e-107

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214451  Cd Length: 525  Bit Score: 316.38  E-value: 8.89e-107
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00182 235 HLFWFFGHPEVYILILPGFGMISQIIPTFVAKKQIFGYLGMVYAMLSIGILGFIVWAHHMFTVGMDVDTRAYFTAATMII 314

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00182 315 AVPTGIKVFSWLATIYGGTLRLDTPMLWAMGFVFLFTLGGLTGVVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIFGG 394

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00182 395 FYYWFGKITGYCYNELYGKIHFWLMFIGVNLTFFPQHFLGLAGFPRR 441
COX1 MTH00184
cytochrome c oxidase subunit I; Provisional
 1-207 2.46e-104

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177235  Cd Length: 519  Bit Score: 310.22  E-value: 2.46e-104
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00184 235 HLFWFFGHPEVYILILPGFGIISQIIPTFAAKKQIFGYLGMVYAMVSIGILGFIVWAHHMFTVGMDVDTRAYFTAATMII 314

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:MTH00184 315 AVPTGIKIFSWIATIFGGSLRLDTPMLWAIGFVFLFTMGGLTGIVLANSSLDVVLHDTYYVVAHFHYVLSMGAVFAIFGG 394

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00184 395 FYYWFGKITGYCYNEVYGKIHFWLMFIGVNLTFFPQHFLGLAGLPRR 441
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
1-207 3.63e-100

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 299.74  E-value: 3.63e-100
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKePFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:COG0843 235 HLFWFFGHPEVYILILPAFGIVSEIIPTFSRKP-LFGYKAMVLATVAIAFLSFLVWAHHMFTPGISPLVKAFFSIATMLI 313

                        90       100       110       120       130       140       150       160
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867  81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:COG0843 314 AVPTGVKVFNWIATMWRGRIRFTTPMLFALGFIILFVIGGLTGVMLASVPLDYQVHDTYFVVAHFHYVLIGGVVFAFFAG 393

                       170       180       190       200
                ....*....|....*....|....*....|....*....|....*..
gi 37780867 161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:COG0843 394 LYYWFPKMTGRMLNERLGKIHFWLWFIGFNLTFFPMHILGLLGMPRR 440
Heme_Cu_Oxidase_I cd00919
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
 1-207 2.60e-99

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: 295.21  E-value: 2.60e-99
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKePFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:cd00919 221 HLFWFFGHPEVYILILPAFGAISEIIPTFSGKP-LFGYKLMVYAFLAIGFLSFLVWAHHMFTVGLPVDTRAYFTAATMII 299

                        90       100       110       120       130       140       150       160
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867  81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:cd00919 300 AVPTGIKVFNWLATLWGGRIRFDPPMLFALGFLFLFTIGGLTGVVLANVPLDIVLHDTYYVVAHFHYVLSGGVVFAIFAG 379

                       170       180       190       200
                ....*....|....*....|....*....|....*....|....*..
gi 37780867 161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:cd00919 380 LYYWFPKMTGRMLSEKLGKIHFWLWFIGFNLTFFPMHFLGLLGMPRR 426
CtaD_CoxA TIGR02891
cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) ...
 1-207 1.31e-98

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


Pssm-ID: 213748  Cd Length: 499  Bit Score: 294.52  E-value: 1.31e-98
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867     1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKePFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:TIGR02891 226 HLFWFFGHPEVYIIFLPAFGIISEILPTFARKP-IFGYRAMVYATVAIGFLSFGVWAHHMFTTGMPPLALAFFSAATMLI 304

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:TIGR02891 305 AVPTGVKVFNWIATLWGGSIRFTTPMLFALGFIFLFVIGGLTGVMLASVPLDWQLHDTYFVVAHFHYVLVGGSVFAIFAA 384

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*..
gi 37780867   161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:TIGR02891 385 IYYWFPKVTGRMYNERLGRWHFWLTFVGFNLTFFPMHLLGLLGMPRR 431
Ubiquinol_Oxidase_I cd01662
Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory ...
 1-207 4.15e-92

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: 277.92  E-value: 4.15e-92
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKePFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:cd01662 227 HLFWIFGHPEVYILILPAFGIFSEIVPTFSRKP-LFGYRSMVYATVAIGFLSFGVWVHHMFTTGAGALVNAFFSIATMII 305

                        90       100       110       120       130       140       150       160
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867  81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:cd01662 306 AVPTGVKIFNWLFTMWRGRIRFETPMLWAIGFLVTFVIGGLTGVMLASPPADFQVHDTYFVVAHFHYVLIGGVVFPLFAG 385

                       170       180       190       200
                ....*....|....*....|....*....|....*....|....*..
gi 37780867 161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:cd01662 386 FYYWFPKMFGRMLNERLGKWSFWLWFIGFNLTFFPMHILGLMGMPRR 432
COX1 MTH00026
cytochrome c oxidase subunit I; Provisional
 1-207 3.42e-87

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 164599  Cd Length: 534  Bit Score: 266.49  E-value: 3.42e-87
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00026 234 HLFWFFGHPEVYILILPGFGIISQILSLFSYKKQIFGYLGMVYAMLAIGVLGFIVWAHHMYVVGMDVDTRAYFTAATMII 313

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGG--TIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAIL 158
Cdd:MTH00026 314 AVPTGIKIFSWLATVSGSgrNLIFTTPMAWALGFIFLFTIGGLTGIVLSNSSLDILLHDTYYVVAHFHFVLSMGAVFAIF 393

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*....
gi 37780867  159 AGLTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00026 394 GGFYLWFGKITGYAYKDIYGLIHFWLMFIGVNITFFPQHFLGLAGLPRR 442
COX1 MTH00048
cytochrome c oxidase subunit I; Provisional
 1-207 8.78e-87

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177123  Cd Length: 511  Bit Score: 264.62  E-value: 8.78e-87
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:MTH00048 231 HMFWFFGHPEVYVLILPGFGIISHICLSLSNNDDPFGYYGLVFAMFSIVCLGSVVWAHHMFTVGLDVKTAVFFSSVTMII 310

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHG-GTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILA 159
Cdd:MTH00048 311 GVPTGIKVFSWLYMLLNsRVRKSDPVVWWVVSFIVLFTIGGVTGIVLSASVLDNVLHDTWFVVAHFHYVLSLGSYSSVVI 390

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*...
gi 37780867  160 GLTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:MTH00048 391 MFIWWWPLITGLSLNKYLLQCHCIISMIGFNLCFFPMHYFGLCGLPRR 438
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-207 1.70e-71

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: 223.22  E-value: 1.70e-71
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867     1 HLFWFFGHPEVYILILPGFGIISHVVAYHAGKKePFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:pfam00115 201 HLFWWFGHPEVYILILPAFGIIYYILPKFAGRP-LFGYKLSVLAFWLIAFLGFLVWAHHLFTTGLPPWLQALFSVFSMLI 279

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    81 AIPTGIKVFSWLATLHGGTIKW-DPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILA 159
Cdd:pfam00115 280 AVPSGVKVFNWLATLWGGWIRFrTTPMLFFLGFAFLFIIGGLTGVMLALPPVNYYVHDTYFVVAHFHYVLFGGVVFALFG 359

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*...
gi 37780867   160 GLTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:pfam00115 360 GIYYWLPKLTGRMYSEKLGKLHFWLLFIGFNLTFFPMHILGLLGMPRR 407
CyoB TIGR02843
cytochrome o ubiquinol oxidase, subunit I; Cytochrome o terminal oxidase complex is the ...
 2-207 1.88e-68

cytochrome o ubiquinol oxidase, subunit I; Cytochrome o terminal oxidase complex is the component of the aerobic respiratory chain which reacts with oxygen, reducing it to water with the concomitant transport of 4 protons across the membrane. Also known as the cytochrome bo complex, cytochrome o ubiquinol oxidase contains four subunits, two heme b cofactors and a copper atom which is believed to be the oxygen active site. This complex is structurally related to the cytochrome caa3 oxidases which utilize cytochrome c as the reductant and contain heme a cofactors, as well as the intermediate form aa3 oxidases which also react directly with quinones as the reductant. [Energy metabolism, Electron transport]


Pssm-ID: 131890  Cd Length: 646  Bit Score: 220.70  E-value: 1.88e-68
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867     2 LFWFFGHPEVYILILPGFGIISHVVAYHAGKKEpFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMIIA 81
Cdd:TIGR02843 277 LIWAWGHPEVYILILPAFGIFSEVVATFSRKRL-FGYTSMVWATIAITVLSFIVWLHHFFTMGAGANVNAFFGIATMIIA 355

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    82 IPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAGL 161
Cdd:TIGR02843 356 IPTGVKIFNWLFTMYKGRIRFETPMLWTIGFMVTFSIGGMTGVLLAVPPADFVLHNSLFLIAHFHNVIIGGVVFGCFAGL 435

                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*.
gi 37780867   162 THWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:TIGR02843 436 TYWFPKAFGFKLNEKLGKRSFWCWFIGFYLAFMPLYILGFMGMTRR 481
PRK15017 PRK15017
cytochrome o ubiquinol oxidase subunit I; Provisional
 1-207 8.09e-59

cytochrome o ubiquinol oxidase subunit I; Provisional


Pssm-ID: 184978  Cd Length: 663  Bit Score: 195.54  E-value: 8.09e-59
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867    1 HLFWFFGHPEVYILILPGFGIISHVVAYHAgKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMII 80
Cdd:PRK15017 277 NLIWAWGHPEVYILILPVFGVFSEIAATFS-RKRLFGYTSLVWATVCITVLSFIVWLHHFFTMGAGANVNAFFGITTMII 355

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   81 AIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAG 160
Cdd:PRK15017 356 AIPTGVKIFNWLFTMYQGRIVFHSAMLWTIGFIVTFSVGGMTGVLLAVPGADFVLHNSLFLIAHFHNVIIGGVVFGCFAG 435

                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 37780867  161 LTHWFPLFTGYTLNQSWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:PRK15017 436 MTYWWPKAFGFKLNETWGKRAFWFWIIGFFVAFMPLYALGFMGMTRR 482
ba3-like_Oxidase_I cd01660
ba3-like heme-copper oxidase subunit I. The ba3 family of heme-copper oxidases are ...
 2-207 2.45e-14

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


Pssm-ID: 238830  Cd Length: 473  Bit Score: 70.78  E-value: 2.45e-14
                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867   2 LFWFFGHPEVYILILPGFGIISHVVAYHAGKK---EPFGYMGMVWAMLsigfLGFIVWAHHMFT-VGMDVDTRAYFTSAT 77
Cdd:cd01660 207 LFWWFGHPLVYFWLLPAYIAWYTILPKIAGGKlfsDPLARLAFILFLL----FSTPVGFHHQFAdPGIGPGWKFIHMVLT 282

                        90       100       110       120       130       140       150       160
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 37780867  78 MIIAIPTGIKVFSWLATL-HGGTIK-------------WDPPMLWALGF-IFLFTIGGLTGIVLANSSLDIALHDTYYVV 142
Cdd:cd01660 283 FMVALPSLLTAFTVFASLeIAGRLRggkglfgwiralpWGDPMFLALFLaMLMFIPGGAGGIINASYQLNYVVHNTAWVP 362

                       170       180       190       200       210       220
                ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 37780867 143 AHFHyvLSMGAVFAILA-GLTHWF-PLFTGYTLNQSW-AKAHFGVMFTGVNLTFFPQHFLGLAGMPRR 207
Cdd:cd01660 363 GHFH--LTVGGAVALTFmAVAYWLvPHLTGRELAAKRlALAQPWLWFVGMTIMSTAMHVAGLLGAPRR 428
 
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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