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Conserved domains on  [gi|254575739|gb|ACT68357|]
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cytochrome oxidase subunit I, partial (mitochondrion) [Tridactylus sp. GFJ-2009]

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 ...
 1-222 2.94e-147

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: 420.04  E-value: 2.94e-147
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00153  19 IFGAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNM 98

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00153  99 SFWLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDR 178

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:MTH00153 179 MPLFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPE 240
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-222 2.94e-147

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 420.04  E-value: 2.94e-147
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00153  19 IFGAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNM 98

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00153  99 SFWLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDR 178

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:MTH00153 179 MPLFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPE 240
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-222 3.60e-131

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: 378.36  E-value: 3.60e-131
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:cd01663   12 IFGLWSGLVGTSLSLLIRLELSQPGSQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNL 91

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:cd01663   92 SFWLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEK 171

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:cd01663  172 MPLFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPE 233
CtaD_CoxA TIGR02891
cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) ...
 1-222 1.91e-77

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: 241.36  E-value: 1.91e-77
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739    1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMiGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:TIGR02891  15 VTAFAFFLVGGVLALLMRAQLATPGNTFMDAETYNQLFTMHGTIMIFLFAIPIL-AGFGNYLLPLMIGARDMAFPRLNAF 93

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:TIGR02891  94 SYWLYLFGGLLLLASFFTGGAPDTGWTMYPPLSSTSGSPGVGVDLWLLGLHLLGISSILGAVNFIVTILNMRAPGMTLMR 173

                         170       180       190       200       210       220
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739  161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:TIGR02891 174 MPLFVWGILVTSILILLAFPVLIAALILLLLDRLFGTHFFDPARGGDPLLWQHLFWFFGHPE 235
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
6-222 6.53e-74

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 233.10  E-value: 6.53e-74
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   6 AGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPiMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLL 85
Cdd:COG0843   29 FLLIGGLLALLMRLQLAGPGLGLLSPETYNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNALSFWLY 107

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  86 PPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQTPLFV 165
Cdd:COG0843  108 LFGGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMPLFT 187

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 254575739 166 WSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:COG0843  188 WAALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLFWFFGHPE 244
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-222 1.91e-46

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: 158.89  E-value: 1.91e-46
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739    1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPiMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:pfam00115   8 VTALVWFLVGGLLGLLIRLQLAFPGLNFLSPLTYNQLRTLHGNLMIFWFATP-FLFGFGNYLVPLMIGARDMAFPRLNAL 86

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   81 SFWLLPPSLLLLLTGSlmeNGAGTGWTVYPPLssviahggSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLdQ 160
Cdd:pfam00115  87 SFWLVVLGAVLLLASF---GGATTGWTEYPPL--------VGVDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-R 154

                         170       180       190       200       210       220
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739  161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNtsffdpAGGGDPILYQHLFWLFGHPE 222
Cdd:pfam00115 155 MPLFVWAILATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLFWWFGHPE 210
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
 1-222 2.94e-147

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 420.04  E-value: 2.94e-147
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00153  19 IFGAWSGMVGTSLSLLIRAELGQPGSLIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMLGAPDMAFPRMNNM 98

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00153  99 SFWLLPPSLTLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDR 178

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:MTH00153 179 MPLFVWSVLITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPE 240
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
 1-222 3.60e-131

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: 378.36  E-value: 3.60e-131
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:cd01663   12 IFGLWSGLVGTSLSLLIRLELSQPGSQLGNDQLYNVIVTAHALIMIFFMVMPALIGGFGNWLVPLMIGAPDMAFPRLNNL 91

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:cd01663   92 SFWLLPPSLLLLLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEK 171

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:cd01663  172 MPLFVWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPE 233
COX1 MTH00167
cytochrome c oxidase subunit I; Provisional
 1-226 1.39e-126

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177222  Cd Length: 512  Bit Score: 367.46  E-value: 1.39e-126
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00167  21 IFGAWAGMVGTALSLLIRAELSQPGSLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00167 101 SFWLLPPSLLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGSINFITTIINMKPPGITQYQ 180

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00167 181 TPLFVWSILVTTILLLLSLPVLAAAITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYIL 246
COX1 MTH00116
cytochrome c oxidase subunit I; Provisional
 1-226 7.44e-126

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177177  Cd Length: 515  Bit Score: 365.57  E-value: 7.44e-126
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00116  21 IFGAWAGMVGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00116 101 SFWLLPPSFLLLLASSTVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTCINMKPPAMSQYQ 180

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00116 181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYIL 246
COX1 MTH00142
cytochrome c oxidase subunit I; Provisional
 1-226 2.08e-123

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214431  Cd Length: 511  Bit Score: 359.42  E-value: 2.08e-123
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00142  19 LFGAWAGMVGTGLSLLIRAELGQPGSLLGDDQLYNVIVTAHAFVMIFFMVMPVMIGGFGNWLVPLMLGAPDMAFPRMNNM 98

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00142  99 SFWLLPPALLLLLSSAAVESGAGTGWTVYPPLSSNLAHSGGSVDLAIFSLHLAGVSSILGAINFITTVINMRAGGMKFER 178

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00142 179 VPLFVWSVKITAILLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYIL 244
COX1 MTH00223
cytochrome c oxidase subunit I; Provisional
 1-226 4.19e-122

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177260  Cd Length: 512  Bit Score: 356.21  E-value: 4.19e-122
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00223  18 IFGMWSGLVGTSLSLLIRAELGQPGALLGDDQLYNVIVTAHAFVMIFFLVMPMMIGGFGNWLVPLMLGAPDMAFPRLNNM 97

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00223  98 SFWLLPPSLYLLLSSSAVESGVGTGWTVYPPLSSNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTIINMRSPGMQLER 177

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00223 178 LPLFVWSVKVTAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYIL 243
COX1 MTH00103
cytochrome c oxidase subunit I; Validated
 1-226 6.34e-113

cytochrome c oxidase subunit I; Validated


Pssm-ID: 177165  Cd Length: 513  Bit Score: 332.62  E-value: 6.34e-113
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00103  21 LFGAWAGMVGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00103 101 SFWLLPPSFLLLLASSMVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMSQYQ 180

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00103 181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYIL 246
COX1 MTH00077
cytochrome c oxidase subunit I; Provisional
 1-226 2.46e-112

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214419  Cd Length: 514  Bit Score: 331.13  E-value: 2.46e-112
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00077  21 VFGAWAGMVGTALSLLIRAELSQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00077 101 SFWLLPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTSINMKPPSMSQYQ 180

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00077 181 TPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPVLYQHLFWFFGHPEVYIL 246
COX1 MTH00183
cytochrome c oxidase subunit I; Provisional
 1-226 7.82e-112

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177234  Cd Length: 516  Bit Score: 329.96  E-value: 7.82e-112
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00183  21 VFGAWAGMVGTALSLLIRAELSQPGALLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00183 101 SFWLLPPSFLLLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAISQYQ 180

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00183 181 TPLFVWAVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYIL 246
COX1 MTH00037
cytochrome c oxidase subunit I; Provisional
 1-226 1.58e-111

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177112  Cd Length: 517  Bit Score: 329.10  E-value: 1.58e-111
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00037  21 IFGAWAGMVGTAMSVIIRTELAQPGSLLQDDQIYNVIVTAHALVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNM 100

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00037 101 SFWLIPPSFLLLLASAGVESGAGTGWTIYPPLSSNIAHAGGSVDLAIFSLHLAGASSILASINFITTIINMRTPGMTFDR 180

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00037 181 LPLFVWSVFITAFLLLLSLPVLAGAITMLLTDRNINTTFFDPAGGGDPILFQHLFWFFGHPEVYIL 246
COX1 MTH00007
cytochrome c oxidase subunit I; Validated
 1-226 7.05e-109

cytochrome c oxidase subunit I; Validated


Pssm-ID: 133649  Cd Length: 511  Bit Score: 322.24  E-value: 7.05e-109
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00007  18 ILGVWGGLLGTSMSLLIRIELGQPGAFLGSDQLYNTIVTAHAFLMIFFLVMPVFIGGFGNWLVPLMLGAPDMAFPRLNNM 97

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00007  98 SFWLLPPALILLVSSAAVEKGVGTGWTVYPPLASNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTVINMRWKGLRLER 177

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00007 178 IPLFVWAVVITVVLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYIL 243
COX1 MTH00182
cytochrome c oxidase subunit I; Provisional
 1-226 6.86e-105

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214451  Cd Length: 525  Bit Score: 312.53  E-value: 6.86e-105
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00182  23 VFGAGAGMIGTAFSMLIRLELSAPGAMLGDDHLYNVIVTAHAFIMIFFLVMPVMIGGFGNWLVPLYIGAPDMAFPRLNNI 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00182 103 SFWLLPPALILLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGAVDMAIFSLHLAGVSSILGAINFITTIFNMRAPGVTFNR 182

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00182 183 LPLFVWSILITAFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILFQHLFWFFGHPEVYIL 248
COX1 MTH00184
cytochrome c oxidase subunit I; Provisional
 1-226 7.60e-104

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177235  Cd Length: 519  Bit Score: 309.83  E-value: 7.60e-104
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00184  23 LFGAFAGMIGTAFSMLIRLELSAPGSMLGDDHLYNVIVTAHAFVMIFFLVMPVMIGGFGNWFVPLYIGAPDMAFPRLNNI 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00184 103 SFWLLPPALTLLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGSVDMAIFSLHLAGISSILGAMNFITTIFNMRAPGITMDR 182

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00184 183 MPLFVWSILVTTFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLFWFFGHPEVYIL 248
COX1 MTH00079
cytochrome c oxidase subunit I; Provisional
 1-226 5.43e-101

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177148  Cd Length: 508  Bit Score: 301.98  E-value: 5.43e-101
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00079  22 LFGLWSGMVGTSLSLIIRLELSKPGLLLGNGQLYNSVITAHAILMIFFMVMPSMIGGFGNWMLPLMLGAPDMSFPRLNNL 101

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSvIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00079 102 SFWLLPTSLFLILDSCFVDMGPGTSWTVYPPLST-LGHPGSSVDLAIFSLHCAGISSILGGINFMVTTKNLRSSSISLEH 180

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00079 181 MSLFVWTVFVTVFLLVLSLPVLAGAITMLLTDRNLNTSFFDPSTGGNPLLYQHLFWFFGHPEVYIL 246
COX1 MTH00026
cytochrome c oxidase subunit I; Provisional
 1-226 5.14e-94

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 164599  Cd Length: 534  Bit Score: 284.98  E-value: 5.14e-94
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00026  22 VFGALSGAIGTAFSMLIRLELSSPGSMLGDDHLYNVIVTAHAFVMIFFLVMPTMIGGFGNWFVPLMIGAPDMAFPRLNNI 101

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:MTH00026 102 SFWLLPPALFLLLGSSLVEQGAGTGWTVYPPLASIQAHSGGSVDMAIFSLHLAGLSSILGAMNFITTVMNMRTPGMTMSR 181

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00026 182 IPLFVWSVFITAILLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLFWFFGHPEVYIL 247
Heme_Cu_Oxidase_I cd00919
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
 1-222 3.41e-84

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: 257.46  E-value: 3.41e-84
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPlMIGAPDMAFPRMNNM 80
Cdd:cd00919   10 IFAFVALLLGGLLALLIRLELATPGSLFLDPQLYNQLVTAHGVIMIFFFVMPAIFGGFGNLLPP-LIGARDLAFPRLNNL 88

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:cd00919   89 SFWLFPPGLLLLLSSVLVGGGAGTGWTFYPPLSTLSYSSGVGVDLAILGLHLAGVSSILGAINFITTILNMRAPGMTLDK 168

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:cd00919  169 MPLFVWSVLVTAILLLLALPVLAAALVMLLLDRNFGTSFFDPAGGGDPVLYQHLFWFFGHPE 230
CtaD_CoxA TIGR02891
cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) ...
 1-222 1.91e-77

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: 241.36  E-value: 1.91e-77
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739    1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMiGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:TIGR02891  15 VTAFAFFLVGGVLALLMRAQLATPGNTFMDAETYNQLFTMHGTIMIFLFAIPIL-AGFGNYLLPLMIGARDMAFPRLNAF 93

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   81 SFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQ 160
Cdd:TIGR02891  94 SYWLYLFGGLLLLASFFTGGAPDTGWTMYPPLSSTSGSPGVGVDLWLLGLHLLGISSILGAVNFIVTILNMRAPGMTLMR 173

                         170       180       190       200       210       220
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739  161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:TIGR02891 174 MPLFVWGILVTSILILLAFPVLIAALILLLLDRLFGTHFFDPARGGDPLLWQHLFWFFGHPE 235
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
6-222 6.53e-74

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 233.10  E-value: 6.53e-74
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   6 AGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPiMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLL 85
Cdd:COG0843   29 FLLIGGLLALLMRLQLAGPGLGLLSPETYNQLFTMHGTIMIFFFATP-FLAGFGNYLVPLQIGARDMAFPRLNALSFWLY 107

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  86 PPSLLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQTPLFV 165
Cdd:COG0843  108 LFGGLLLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMPLFT 187

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 254575739 166 WSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:COG0843  188 WAALVTSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLFWFFGHPE 244
COX1 MTH00048
cytochrome c oxidase subunit I; Provisional
 1-226 2.86e-69

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177123  Cd Length: 511  Bit Score: 220.32  E-value: 2.86e-69
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:MTH00048  22 LLGVWSGFVGLSLSLLIRLNFLDPYYNVISLDVYNFLITNHGIIMIFFFLMPVLIGGFGNYLLPLLLGLSDLNLPRLNAL 101

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  81 SFWLLPPSLLLLLTGslMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTaINMRAPMMYLDQ 160
Cdd:MTH00048 102 SAWLLVPSIVFLLLS--MCLGAGVGWTFYPPLSSSLFSSSWGVDFLMFSLHLAGVSSLFGSINFICT-IYSAFMTNVFSR 178

                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 254575739 161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:MTH00048 179 TSIILWSYLFTSILLLLSLPVLAAAITMLLFDRNFGSAFFDPLGGGDPVLFQHMFWFFGHPEVYVL 244
Ubiquinol_Oxidase_I cd01662
Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory ...
 10-222 4.32e-61

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: 198.96  E-value: 4.32e-61
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  10 GTSLSMLIRVELGNP-GQFIGDDQiYNVIVTAHAFIMIFFMVMPIMIGgFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPS 88
Cdd:cd01662   25 GGVDALLMRTQLALPgNDFLSPEH-YNQIFTMHGTIMIFLFAMPLVFG-LMNYLVPLQIGARDVAFPRLNALSFWLFLFG 102

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  89 LLLLLTGSLMENGAGTGWTVYPPLSSVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQTPLFVWSV 168
Cdd:cd01662  103 GLLLNASLLIGGFPDAGWFAYPPLSGLEYSPGVGVDYWILGLQFSGIGTLLGAINFIVTILKMRAPGMTLMRMPIFTWTT 182

                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|....
gi 254575739 169 GITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWLFGHPE 222
Cdd:cd01662  183 LVTSILILFAFPVLTAALALLELDRYFGTHFFTNALGGNPMLWQHLFWIFGHPE 236
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
 1-222 1.91e-46

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: 158.89  E-value: 1.91e-46
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739    1 LFGAWAGMVGTSLSMLIRVELGNPGQFIGDDQIYNVIVTAHAFIMIFFMVMPiMIGGFGNWLVPLMIGAPDMAFPRMNNM 80
Cdd:pfam00115   8 VTALVWFLVGGLLGLLIRLQLAFPGLNFLSPLTYNQLRTLHGNLMIFWFATP-FLFGFGNYLVPLMIGARDMAFPRLNAL 86

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739   81 SFWLLPPSLLLLLTGSlmeNGAGTGWTVYPPLssviahggSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLdQ 160
Cdd:pfam00115  87 SFWLVVLGAVLLLASF---GGATTGWTEYPPL--------VGVDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-R 154

                         170       180       190       200       210       220
                  ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 254575739  161 TPLFVWSVGITALLLLLSLPVLAGAITMLLTDRNLNtsffdpAGGGDPILYQHLFWLFGHPE 222
Cdd:pfam00115 155 MPLFVWAILATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLFWWFGHPE 210
PRK15017 PRK15017
cytochrome o ubiquinol oxidase subunit I; Provisional
 34-226 7.32e-37

cytochrome o ubiquinol oxidase subunit I; Provisional


Pssm-ID: 184978  Cd Length: 663  Bit Score: 136.22  E-value: 7.32e-37
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739  34 YNVIVTAHAFIMIFFMVMPIMIGgFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSLLLLLTGSLMENGAGTGWTVYPPLS 113
Cdd:PRK15017  99 YDQIFTAHGVIMIFFVAMPFVIG-LMNLVVPLQIGARDVAFPFLNNLSFWFTVVGVILVNVSLGVGEFAQTGWLAYPPLS 177

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 254575739 114 SVIAHGGSAVDLTIFSLHLAGVSSILGAINFITTAINMRAPMMYLDQTPLFVWSVGITALLLLLSLPVLAGAITMLLTDR 193
Cdd:PRK15017 178 GIEYSPGVGVDYWIWSLQLSGIGTTLTGINFFVTILKMRAPGMTMFKMPVFTWASLCANVLIIASFPILTVTVALLTLDR 257

                        170       180       190
                 ....*....|....*....|....*....|...
gi 254575739 194 NLNTSFFDPAGGGDPILYQHLFWLFGHPESFKL 226
Cdd:PRK15017 258 YLGTHFFTNDMGGNMMMYINLIWAWGHPEVYIL 290
 
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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