NCBI Home Page NCBI Site Search page NCBI Guide that lists and describes the NCBI resources
Conserved domains on  [gi|528749159|gb|AGS43720|]
View 

cytochrome oxidase subunit I, partial (mitochondrion) [Poecilimon obtusicercus]

Protein Classification

cytochrome-c oxidase subunit 1( domain architecture ID 10009591)

cytochrome-c oxidase subunit 1 is the catalytic subunit of cytochrome c oxidase, which is the component of the respiratory chain that catalyzes the reduction of oxygen to water

Graphical summary

 Zoom to residue level

show extra options »

Show site features     Horizontal zoom: ×

List of domain hits

Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
1-382 0e+00

cytochrome c oxidase subunit I; Provisional


:

Pssm-ID: 177210  Cd Length: 511  Bit Score: 771.35  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:MTH00153 108 TLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMPLFVWSVL 187
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFG 160
Cdd:MTH00153 188 ITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKETFG 267
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:MTH00153 268 TLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGSQINYSPSLLWALGFVFLFT 347
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:MTH00153 348 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMGGFIHWFPLFTGLTMNPKWLKIQFFIMFIGVNLTFFPQH 427
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:MTH00153 428 FLGLAGMPRRYSDYPDAYTSWNVISSIGSTISLISILFFIFIIWESMISKRPVLFSLNLSSS 489
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
1-382 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 771.35  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:MTH00153 108 TLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMPLFVWSVL 187
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFG 160
Cdd:MTH00153 188 ITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKETFG 267
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:MTH00153 268 TLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGSQINYSPSLLWALGFVFLFT 347
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:MTH00153 348 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMGGFIHWFPLFTGLTMNPKWLKIQFFIMFIGVNLTFFPQH 427
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:MTH00153 428 FLGLAGMPRRYSDYPDAYTSWNVISSIGSTISLISILFFIFIIWESMISKRPVLFSLNLSSS 489
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
3-382 0e+00

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: 673.04  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   3 LLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAIT 82
Cdd:cd01663  103 LLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEKMPLFVWSVLIT 182
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  83 ALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGTL 162
Cdd:cd01663  183 AFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISHIISTFSGKKPVFGYL 262
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 163 GMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTIG 242
Cdd:cd01663  263 GMVYAMLSIGILGFIVWAHHMFTVGLDVDTRAYFTAATMIIAVPTGIKVFSWLATMWGGSIKFETPMLWALGFIFLFTIG 342
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 243 GLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHFL 322
Cdd:cd01663  343 GLTGVVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAIFAGFYYWFPKITGLSYNETLGKIHFWLMFIGVNLTFFPQHFL 422
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 323 GLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:cd01663  423 GLAGMPRRYPDYPDAYAGWNMISSIGSLISFVSVLLFLFIVWESFVSGRKVIFNVGEGST 482
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
2-353 9.07e-151

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 436.48  E-value: 9.07e-151
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:COG0843  113 LLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMPLFTWAALV 192
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeAFGT 161
Cdd:COG0843  193 TSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLFWFFGHPEVYILILPAFGIVSEIIPTFSRKP-LFGY 271
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:COG0843  272 KAMVLATVAIAFLSFLVWAHHMFTPGISPLVKAFFSIATMLIAVPTGVKVFNWIATMWRGRIRFTTPMLFALGFIILFVI 351
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:COG0843  352 GGLTGVMLASVPLDYQVHDTYFVVAHFHYVLIGGVVFAFFAGLYYWFPKMTGRMLNERLGKIHFWLWFIGFNLTFFPMHI 431
                        330       340       350
                 ....*....|....*....|....*....|....
gi 528749159 322 LGLAGMPRRYSDYP--DVYTSWNVLSSIGSTISF 353
Cdd:COG0843  432 LGLLGMPRRYATYPpePGWQPLNLISTIGAFILA 465
CtaD_CoxA TIGR02891
cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) ...
2-367 6.58e-149

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: 430.49  E-value: 6.58e-149
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159    2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:TIGR02891 104 LLLASFFTGGAPDTGWTMYPPLSSTSGSPGVGVDLWLLGLHLLGISSILGAVNFIVTILNMRAPGMTLMRMPLFVWGILV 183
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeAFGT 161
Cdd:TIGR02891 184 TSILILLAFPVLIAALILLLLDRLFGTHFFDPARGGDPLLWQHLFWFFGHPEVYIIFLPAFGIISEILPTFARKP-IFGY 262
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:TIGR02891 263 RAMVYATVAIGFLSFGVWAHHMFTTGMPPLALAFFSAATMLIAVPTGVKVFNWIATLWGGSIRFTTPMLFALGFIFLFVI 342
                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:TIGR02891 343 GGLTGVMLASVPLDWQLHDTYFVVAHFHYVLVGGSVFAIFAAIYYWFPKVTGRMYNERLGRWHFWLTFVGFNLTFFPMHL 422
                         330       340       350       360
                  ....*....|....*....|....*....|....*....|....*...
gi 528749159  322 LGLAGMPRRYSDYPD--VYTSWNVLSSIGSTISFIGIIMLIFIIWESM 367
Cdd:TIGR02891 423 LGLLGMPRRYYTYPPqmGFATLNLISTIGAFILAAGFLVFLWNLIWSL 470
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
1-351 1.62e-100

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: 304.50  E-value: 1.62e-100
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159    1 TILLASSLveNGAGTGWTVYPPLSAgiahggasVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLdQTPLFVWSVA 80
Cdd:pfam00115  95 AVLLLASF--GGATTGWTEYPPLVG--------VDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-RMPLFVWAIL 163
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   81 ITALLLLLSLPVLAGAITMLLTDRNLNtsffdpAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeAFG 160
Cdd:pfam00115 164 ATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLFWWFGHPEVYILILPAFGIIYYILPKFAGRP-LFG 236
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLT-YSPALLWALGFVFLF 239
Cdd:pfam00115 237 YKLSVLAFWLIAFLGFLVWAHHLFTTGLPPWLQALFSVFSMLIAVPSGVKVFNWLATLWGGWIRfRTTPMLFFLGFAFLF 316
                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  240 TIGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQ 319
Cdd:pfam00115 317 IIGGLTGVMLALPPVNYYVHDTYFVVAHFHYVLFGGVVFALFGGIYYWLPKLTGRMYSEKLGKLHFWLLFIGFNLTFFPM 396
                         330       340       350
                  ....*....|....*....|....*....|....*.
gi 528749159  320 HFLGLAGMPRRYS----DYPDVYTSWNVLSSIGSTI 351
Cdd:pfam00115 397 HILGLLGMPRRYAppfiETVPAFQPLNWIRTIGGVL 432
 
Name Accession Description Interval E-value
COX1 MTH00153
cytochrome c oxidase subunit I; Provisional
1-382 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177210  Cd Length: 511  Bit Score: 771.35  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:MTH00153 108 TLLLSSSMVESGAGTGWTVYPPLSSNIAHSGASVDLAIFSLHLAGISSILGAINFITTIINMRSKGMTLDRMPLFVWSVL 187
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFG 160
Cdd:MTH00153 188 ITAILLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKETFG 267
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:MTH00153 268 TLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGSQINYSPSLLWALGFVFLFT 347
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:MTH00153 348 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMGGFIHWFPLFTGLTMNPKWLKIQFFIMFIGVNLTFFPQH 427
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:MTH00153 428 FLGLAGMPRRYSDYPDAYTSWNVISSIGSTISLISILFFIFIIWESMISKRPVLFSLNLSSS 489
Cyt_c_Oxidase_I cd01663
Cytochrome C oxidase subunit I. Cytochrome c oxidase (CcO), the terminal oxidase in the ...
3-382 0e+00

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: 673.04  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   3 LLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAIT 82
Cdd:cd01663  103 LLLSALVEGGAGTGWTVYPPLSSILAHSGPSVDLAIFSLHLAGISSILGAINFITTIFNMRAPGMTLEKMPLFVWSVLIT 182
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  83 ALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGTL 162
Cdd:cd01663  183 AFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISHIISTFSGKKPVFGYL 262
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 163 GMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTIG 242
Cdd:cd01663  263 GMVYAMLSIGILGFIVWAHHMFTVGLDVDTRAYFTAATMIIAVPTGIKVFSWLATMWGGSIKFETPMLWALGFIFLFTIG 342
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 243 GLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHFL 322
Cdd:cd01663  343 GLTGVVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAIFAGFYYWFPKITGLSYNETLGKIHFWLMFIGVNLTFFPQHFL 422
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 323 GLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:cd01663  423 GLAGMPRRYPDYPDAYAGWNMISSIGSLISFVSVLLFLFIVWESFVSGRKVIFNVGEGST 482
COX1 MTH00167
cytochrome c oxidase subunit I; Provisional
2-375 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177222  Cd Length: 512  Bit Score: 630.94  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:MTH00167 111 LLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGSINFITTIINMKPPGITQYQTPLFVWSILV 190
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGT 161
Cdd:MTH00167 191 TTILLLLSLPVLAAAITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVVYYSGKKEPFGY 270
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:MTH00167 271 MGMVWAMMAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKVFSWLATLHGGKIKWETPMLWALGFIFLFTV 350
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:MTH00167 351 GGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMAGFTHWFPLFTGLTLNETWTKIHFFVMFIGVNLTFFPQHF 430
                        330       340       350       360       370
                 ....*....|....*....|....*....|....*....|....*....|....
gi 528749159 322 LGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLF 375
Cdd:MTH00167 431 LGLAGMPRRYSDYPDAYTLWNVVSSIGSLISLVAVILFLFIIWEAFSSKRKLLP 484
COX1 MTH00223
cytochrome c oxidase subunit I; Provisional
1-382 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177260  Cd Length: 512  Bit Score: 629.70  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:MTH00223 107 YLLLSSSAVESGVGTGWTVYPPLSSNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTIINMRSPGMQLERLPLFVWSVK 186
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFG 160
Cdd:MTH00223 187 VTAFLLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVSHYSSKKEVFG 266
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:MTH00223 267 TLGMIYAMLSIGVLGFIVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWLATIYGSKIKYEAPMLWALGFIFLFT 346
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:MTH00223 347 VGGLTGIILSNSSLDIMLHDTYYVVAHFHYVLSMGAVFALFAGFNHWFPLFTGVTLHRRWAKAHFFLMFLGVNLTFFPQH 426
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:MTH00223 427 FLGLAGMPRRYSDYPDCYTKWNQVSSFGSMISFVSVLFFMFIVWEAFVSQRSVVWSGHLSTS 488
COX1 MTH00142
cytochrome c oxidase subunit I; Provisional
1-382 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214431  Cd Length: 511  Bit Score: 629.45  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:MTH00142 108 LLLLSSAAVESGAGTGWTVYPPLSSNLAHSGGSVDLAIFSLHLAGVSSILGAINFITTVINMRAGGMKFERVPLFVWSVK 187
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFG 160
Cdd:MTH00142 188 ITAILLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIINHYSGKKEVFG 267
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:MTH00142 268 TLGMIYAMLSIGLLGFIVWAHHMFTVGMDVDTRAYFTAATMVIAVPTGIKVFSWLATLHGSKVKYEPPMLWALGFIFLFT 347
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:MTH00142 348 VGGLTGIVLANSSLDVVLHDTYYVVAHFHYVLSMGAVFALFAGFIHWFPLFTGLTLNPRWLKAHFYTMFIGVNLTFFPQH 427
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:MTH00142 428 FLGLAGMPRRYSDYPDAYTTWNVVSSLGSMISFIAVLMFVFIVWESFVSQRLVMWSSHLSTS 489
COX1 MTH00116
cytochrome c oxidase subunit I; Provisional
1-380 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177177  Cd Length: 515  Bit Score: 625.96  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:MTH00116 110 LLLLASSTVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGVSSILGAINFITTCINMKPPAMSQYQTPLFVWSVL 189
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFG 160
Cdd:MTH00116 190 ITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISHIVTYYAGKKEPFG 269
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:MTH00116 270 YMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFT 349
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:MTH00116 350 IGGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMAGFTHWFPLFTGYTLHQTWTKAQFGVMFTGVNLTFFPQH 429
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMT 380
Cdd:MTH00116 430 FLGLAGMPRRYSDYPDAYTLWNTISSIGSLISMTAVIMLMFIIWEAFSSKRKVLQPELTT 489
COX1 MTH00037
cytochrome c oxidase subunit I; Provisional
2-382 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177112  Cd Length: 517  Bit Score: 565.61  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:MTH00037 111 LLLASAGVESGAGTGWTIYPPLSSNIAHAGGSVDLAIFSLHLAGASSILASINFITTIINMRTPGMTFDRLPLFVWSVFI 190
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGT 161
Cdd:MTH00037 191 TAFLLLLSLPVLAGAITMLLTDRNINTTFFDPAGGGDPILFQHLFWFFGHPEVYILILPGFGMISHVIAHYSGKQEPFGY 270
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:MTH00037 271 LGMVYAMIAIGILGFLVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWMATLQGSNLRWETPLLWALGFVFLFTI 350
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:MTH00037 351 GGLTGIVLANSSIDVVLHDTYYVVAHFHYVLSMGAVFAIFAGFTHWFPLFSGVSLHPLWSKVHFFLMFIGVNLTFFPQHF 430
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 528749159 322 LGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:MTH00037 431 LGLAGMPRRYSDYPDAYTLWNTVSSIGSTISLVATLFFLFLIWEAFASQREVISPEFSSSS 491
COX1 MTH00103
cytochrome c oxidase subunit I; Validated
2-375 0e+00

cytochrome c oxidase subunit I; Validated


Pssm-ID: 177165  Cd Length: 513  Bit Score: 562.97  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:MTH00103 111 LLLASSMVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMSQYQTPLFVWSVLI 190
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGT 161
Cdd:MTH00103 191 TAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVTYYSGKKEPFGY 270
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:MTH00103 271 MGMVWAMMSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAIPTGVKVFSWLATLHGGNIKWSPAMLWALGFIFLFTV 350
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:MTH00103 351 GGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMGGFVHWFPLFSGYTLNDTWAKIHFTIMFVGVNMTFFPQHF 430
                        330       340       350       360       370
                 ....*....|....*....|....*....|....*....|....*....|....
gi 528749159 322 LGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLF 375
Cdd:MTH00103 431 LGLSGMPRRYSDYPDAYTTWNTVSSMGSFISLTAVMLMIFMIWEAFASKREVLT 484
COX1 MTH00183
cytochrome c oxidase subunit I; Provisional
2-375 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177234  Cd Length: 516  Bit Score: 553.76  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:MTH00183 111 LLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAISQYQTPLFVWAVLI 190
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGT 161
Cdd:MTH00183 191 TAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVAYYSGKKEPFGY 270
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:MTH00183 271 MGMVWAMMAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAIPTGVKVFSWLATLHGGSIKWETPLLWALGFIFLFTV 350
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:MTH00183 351 GGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMAAFVHWFPLFSGYTLHSTWTKIHFGVMFVGVNLTFFPQHF 430
                        330       340       350       360       370
                 ....*....|....*....|....*....|....*....|....*....|....
gi 528749159 322 LGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLF 375
Cdd:MTH00183 431 LGLAGMPRRYSDYPDAYTLWNTVSSIGSLISLVAVIMFLFILWEAFAAKREVLS 484
COX1 MTH00007
cytochrome c oxidase subunit I; Validated
1-382 0e+00

cytochrome c oxidase subunit I; Validated


Pssm-ID: 133649  Cd Length: 511  Bit Score: 553.74  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:MTH00007 107 ILLVSSAAVEKGVGTGWTVYPPLASNLAHAGPSVDLAIFSLHLAGVSSILGAINFITTVINMRWKGLRLERIPLFVWAVV 186
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFG 160
Cdd:MTH00007 187 ITVVLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGAISHIVTHYAGKLEPFG 266
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:MTH00007 267 TLGMIYAMLGIGVLGFIVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWLATIHGSPIKYETPMLWALGFIFLFT 346
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:MTH00007 347 TGGLTGIVLSNSSLDIILHDTYYVVAHFHYVLSMGAVFAIFAAFNHWFPLFTGLTLHDRWAKAHFFLMFLGVNLTFFPQH 426
                        330       340       350       360       370       380
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVLFPLSMTSS 382
Cdd:MTH00007 427 FLGLSGMPRRYSDYPDAYTKWNVVSSFGSMLSFVALLLFIFILWEAFSAQRGVIASPHMSSS 488
COX1 MTH00077
cytochrome c oxidase subunit I; Provisional
2-374 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214419  Cd Length: 514  Bit Score: 546.08  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:MTH00077 111 LLLASSGVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTSINMKPPSMSQYQTPLFVWSVLI 190
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGT 161
Cdd:MTH00077 191 TAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPVLYQHLFWFFGHPEVYILILPGFGMISHIVTYYSAKKEPFGY 270
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:MTH00077 271 MGMVWAMMSIGLLGFIVWAHHMFTVDLNVDTRAYFTSATMIIAIPTGVKVFSWLATMHGGAIKWDAAMLWALGFIFLFTV 350
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:MTH00077 351 GGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMGGFVHWFPLFSGYTLHSTWSKIHFGVMFIGVNLTFFPQHF 430
                        330       340       350       360       370
                 ....*....|....*....|....*....|....*....|....*....|...
gi 528749159 322 LGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVL 374
Cdd:MTH00077 431 LGLAGMPRRYSDYPDAYTLWNTVSSIGSLISLVAVIMMMFIIWEAFSSKREVL 483
COX1 MTH00079
cytochrome c oxidase subunit I; Provisional
2-374 0e+00

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177148  Cd Length: 508  Bit Score: 518.47  E-value: 0e+00
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAgIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:MTH00079 112 LILDSCFVDMGPGTSWTVYPPLST-LGHPGSSVDLAIFSLHCAGISSILGGINFMVTTKNLRSSSISLEHMSLFVWTVFV 190
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGT 161
Cdd:MTH00079 191 TVFLLVLSLPVLAGAITMLLTDRNLNTSFFDPSTGGNPLLYQHLFWFFGHPEVYILILPAFGIISQSTLYLTGKKEVFGS 270
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:MTH00079 271 LGMVYAILSIGLIGCVVWAHHMYTVGMDLDSRAYFTAATMVIAVPTGVKVFSWLATLFGMKMKFQPLLLWVLGFIFLFTI 350
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:MTH00079 351 GGLTGVILSNSSLDIILHDTYYVVSHFHYVLSLGAVFGIFTGISLWWPFMTGIVYDKLMMSAVFFLMFVGVNLTFFPLHF 430
                        330       340       350       360       370
                 ....*....|....*....|....*....|....*....|....*....|...
gi 528749159 322 LGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVL 374
Cdd:MTH00079 431 AGLHGMPRKYLDYPDVYSVWNVISSYGSMISVFALFLFIYVLLESFFSYRLVL 483
COX1 MTH00182
cytochrome c oxidase subunit I; Provisional
2-352 4.37e-178

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 214451  Cd Length: 525  Bit Score: 505.51  E-value: 4.37e-178
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:MTH00182 113 LLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGAVDMAIFSLHLAGVSSILGAINFITTIFNMRAPGVTFNRLPLFVWSILI 192
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGT 161
Cdd:MTH00182 193 TAFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILFQHLFWFFGHPEVYILILPGFGMISQIIPTFVAKKQIFGY 272
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:MTH00182 273 LGMVYAMLSIGILGFIVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWLATIYGGTLRLDTPMLWAMGFVFLFTL 352
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:MTH00182 353 GGLTGVVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIFGGFYYWFGKITGYCYNELYGKIHFWLMFIGVNLTFFPQHF 432
                        330       340       350
                 ....*....|....*....|....*....|.
gi 528749159 322 LGLAGMPRRYSDYPDVYTSWNVLSSIGSTIS 352
Cdd:MTH00182 433 LGLAGFPRRYSDFADAFAGWNLVSSLGSIIS 463
COX1 MTH00184
cytochrome c oxidase subunit I; Provisional
1-352 2.83e-174

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177235  Cd Length: 519  Bit Score: 495.50  E-value: 2.83e-174
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:MTH00184 112 TLLLGSAFVEQGAGTGWTVYPPLSSIQAHSGGSVDMAIFSLHLAGISSILGAMNFITTIFNMRAPGITMDRMPLFVWSIL 191
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFG 160
Cdd:MTH00184 192 VTTFLLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISQIIPTFAAKKQIFG 271
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:MTH00184 272 YLGMVYAMVSIGILGFIVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKIFSWIATIFGGSLRLDTPMLWAIGFVFLFT 351
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:MTH00184 352 MGGLTGIVLANSSLDVVLHDTYYVVAHFHYVLSMGAVFAIFGGFYYWFGKITGYCYNEVYGKIHFWLMFIGVNLTFFPQH 431
                        330       340       350
                 ....*....|....*....|....*....|..
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTIS 352
Cdd:MTH00184 432 FLGLAGLPRRYSDFHDSFAGWNQISSLGSVIS 463
Heme_Cu_Oxidase_I cd00919
Heme-copper oxidase subunit I. Heme-copper oxidases are transmembrane protein complexes in ...
1-367 8.40e-163

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: 464.31  E-value: 8.40e-163
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   1 TILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVA 80
Cdd:cd00919   98 LLLLSSVLVGGGAGTGWTFYPPLSTLSYSSGVGVDLAILGLHLAGVSSILGAINFITTILNMRAPGMTLDKMPLFVWSVL 177
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  81 ITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeAFG 160
Cdd:cd00919  178 VTAILLLLALPVLAAALVMLLLDRNFGTSFFDPAGGGDPVLYQHLFWFFGHPEVYILILPAFGAISEIIPTFSGKP-LFG 256
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFT 240
Cdd:cd00919  257 YKLMVYAFLAIGFLSFLVWAHHMFTVGLPVDTRAYFTAATMIIAVPTGIKVFNWLATLWGGRIRFDPPMLFALGFLFLFT 336
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 241 IGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQH 320
Cdd:cd00919  337 IGGLTGVVLANVPLDIVLHDTYYVVAHFHYVLSGGVVFAIFAGLYYWFPKMTGRMLSEKLGKIHFWLWFIGFNLTFFPMH 416
                        330       340       350       360
                 ....*....|....*....|....*....|....*....|....*..
gi 528749159 321 FLGLAGMPRRYSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESM 367
Cdd:cd00919  417 FLGLLGMPRRYADYPDGFAPWNFISSVGAFILGLGLLLFLGNLFLSL 463
COX1 MTH00026
cytochrome c oxidase subunit I; Provisional
2-352 5.42e-156

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 164599  Cd Length: 534  Bit Score: 449.85  E-value: 5.42e-156
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:MTH00026 112 LLLGSSLVEQGAGTGWTVYPPLASIQAHSGGSVDMAIFSLHLAGLSSILGAMNFITTVMNMRTPGMTMSRIPLFVWSVFI 191
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGT 161
Cdd:MTH00026 192 TAILLLLSLPVLAGAITMLLTDRNFNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISQILSLFSYKKQIFGY 271
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGT--QLTYSPALLWALGFVFLF 239
Cdd:MTH00026 272 LGMVYAMLAIGVLGFIVWAHHMYVVGMDVDTRAYFTAATMIIAVPTGIKIFSWLATVSGSgrNLIFTTPMAWALGFIFLF 351
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 240 TIGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQ 319
Cdd:MTH00026 352 TIGGLTGIVLSNSSLDILLHDTYYVVAHFHFVLSMGAVFAIFGGFYLWFGKITGYAYKDIYGLIHFWLMFIGVNITFFPQ 431
                        330       340       350
                 ....*....|....*....|....*....|...
gi 528749159 320 HFLGLAGMPRRYSDYPDVYTSWNVLSSIGSTIS 352
Cdd:MTH00026 432 HFLGLAGLPRRYADYPDNFEDFNQISSFGSIIS 464
CyoB COG0843
Heme/copper-type cytochrome/quinol oxidase, subunit 1 [Energy production and conversion];
2-353 9.07e-151

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


Pssm-ID: 440605  Cd Length: 535  Bit Score: 436.48  E-value: 9.07e-151
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:COG0843  113 LLLISLFVGGAADVGWTFYPPLSGLEASPGVGVDLWLLGLALFGVGSILGGVNFIVTILKMRAPGMTLMRMPLFTWAALV 192
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeAFGT 161
Cdd:COG0843  193 TSILILLAFPVLAAALLLLLLDRSLGTHFFDPAGGGDPLLWQHLFWFFGHPEVYILILPAFGIVSEIIPTFSRKP-LFGY 271
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:COG0843  272 KAMVLATVAIAFLSFLVWAHHMFTPGISPLVKAFFSIATMLIAVPTGVKVFNWIATMWRGRIRFTTPMLFALGFIILFVI 351
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:COG0843  352 GGLTGVMLASVPLDYQVHDTYFVVAHFHYVLIGGVVFAFFAGLYYWFPKMTGRMLNERLGKIHFWLWFIGFNLTFFPMHI 431
                        330       340       350
                 ....*....|....*....|....*....|....
gi 528749159 322 LGLAGMPRRYSDYP--DVYTSWNVLSSIGSTISF 353
Cdd:COG0843  432 LGLLGMPRRYATYPpePGWQPLNLISTIGAFILA 465
CtaD_CoxA TIGR02891
cytochrome c oxidase, subunit I; This large family represents subunit I's (CtaD, CoxA, CaaA) ...
2-367 6.58e-149

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: 430.49  E-value: 6.58e-149
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159    2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:TIGR02891 104 LLLASFFTGGAPDTGWTMYPPLSSTSGSPGVGVDLWLLGLHLLGISSILGAVNFIVTILNMRAPGMTLMRMPLFVWGILV 183
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeAFGT 161
Cdd:TIGR02891 184 TSILILLAFPVLIAALILLLLDRLFGTHFFDPARGGDPLLWQHLFWFFGHPEVYIIFLPAFGIISEILPTFARKP-IFGY 262
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:TIGR02891 263 RAMVYATVAIGFLSFGVWAHHMFTTGMPPLALAFFSAATMLIAVPTGVKVFNWIATLWGGSIRFTTPMLFALGFIFLFVI 342
                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:TIGR02891 343 GGLTGVMLASVPLDWQLHDTYFVVAHFHYVLVGGSVFAIFAAIYYWFPKVTGRMYNERLGRWHFWLTFVGFNLTFFPMHL 422
                         330       340       350       360
                  ....*....|....*....|....*....|....*....|....*...
gi 528749159  322 LGLAGMPRRYSDYPD--VYTSWNVLSSIGSTISFIGIIMLIFIIWESM 367
Cdd:TIGR02891 423 LGLLGMPRRYYTYPPqmGFATLNLISTIGAFILAAGFLVFLWNLIWSL 470
COX1 MTH00048
cytochrome c oxidase subunit I; Provisional
12-374 5.24e-136

cytochrome c oxidase subunit I; Provisional


Pssm-ID: 177123  Cd Length: 511  Bit Score: 397.90  E-value: 5.24e-136
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  12 GAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLdQTPLFVWSVAITALLLLLSLP 91
Cdd:MTH00048 120 GAGVGWTFYPPLSSSLFSSSWGVDFLMFSLHLAGVSSLFGSINFICTIYSAFMTNVFS-RTSIILWSYLFTSILLLLSLP 198
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  92 VLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGTLGMIYAMLAI 171
Cdd:MTH00048 199 VLAAAITMLLFDRNFGSAFFDPLGGGDPVLFQHMFWFFGHPEVYVLILPGFGIISHICLSLSNNDDPFGYYGLVFAMFSI 278
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 172 GLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYS-PALLWALGFVFLFTIGGLTGVVLA 250
Cdd:MTH00048 279 VCLGSVVWAHHMFTVGLDVKTAVFFSSVTMIIGVPTGIKVFSWLYMLLNSRVRKSdPVVWWVVSFIVLFTIGGVTGIVLS 358
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 251 NSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHFLGLAGMPRR 330
Cdd:MTH00048 359 ASVLDNVLHDTWFVVAHFHYVLSLGSYSSVVIMFIWWWPLITGLSLNKYLLQCHCIISMIGFNLCFFPMHYFGLCGLPRR 438
                        330       340       350       360
                 ....*....|....*....|....*....|....*....|....
gi 528749159 331 YSDYPDVYTSWNVLSSIGSTISFIGIIMLIFIIWESMISNRTVL 374
Cdd:MTH00048 439 VCVYEPSYYWINVVCTVGSFISAFSGCFFVFILWESLVVKNEVL 482
Ubiquinol_Oxidase_I cd01662
Ubiquinol oxidase subunit I. Ubiquinol oxidase, the terminal oxidase in the respiratory ...
2-351 7.46e-132

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: 386.94  E-value: 7.46e-132
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   2 ILLASSLVENGAGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAI 81
Cdd:cd01662  105 LLNASLLIGGFPDAGWFAYPPLSGLEYSPGVGVDYWILGLQFSGIGTLLGAINFIVTILKMRAPGMTLMRMPIFTWTTLV 184
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  82 TALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeAFGT 161
Cdd:cd01662  185 TSILILFAFPVLTAALALLELDRYFGTHFFTNALGGNPMLWQHLFWIFGHPEVYILILPAFGIFSEIVPTFSRKP-LFGY 263
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 162 LGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTI 241
Cdd:cd01662  264 RSMVYATVAIGFLSFGVWVHHMFTTGAGALVNAFFSIATMIIAVPTGVKIFNWLFTMWRGRIRFETPMLWAIGFLVTFVI 343
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 242 GGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHF 321
Cdd:cd01662  344 GGLTGVMLASPPADFQVHDTYFVVAHFHYVLIGGVVFPLFAGFYYWFPKMFGRMLNERLGKWSFWLWFIGFNLTFFPMHI 423
                        330       340       350
                 ....*....|....*....|....*....|..
gi 528749159 322 LGLAGMPRRYSDYPDV--YTSWNVLSSIGSTI 351
Cdd:cd01662  424 LGLMGMPRRVYTYLPGpgWDPLNLISTIGAFL 455
COX1 pfam00115
Cytochrome C and Quinol oxidase polypeptide I; Cytochrome c oxidase (E.C:7.1.1.9) is a key ...
1-351 1.62e-100

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: 304.50  E-value: 1.62e-100
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159    1 TILLASSLveNGAGTGWTVYPPLSAgiahggasVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLdQTPLFVWSVA 80
Cdd:pfam00115  95 AVLLLASF--GGATTGWTEYPPLVG--------VDLWYIGLLLAGVSSLLGAINFIVTILKRRAPGMTL-RMPLFVWAIL 163
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   81 ITALLLLLSLPVLAGAITMLLTDRNLNtsffdpAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKeAFG 160
Cdd:pfam00115 164 ATAILILLAFPVLAAALLLLLLDRSLG------AGGGDPLLDQHLFWWFGHPEVYILILPAFGIIYYILPKFAGRP-LFG 236
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  161 TLGMIYAMLAIGLLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLT-YSPALLWALGFVFLF 239
Cdd:pfam00115 237 YKLSVLAFWLIAFLGFLVWAHHLFTTGLPPWLQALFSVFSMLIAVPSGVKVFNWLATLWGGWIRfRTTPMLFFLGFAFLF 316
                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  240 TIGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQ 319
Cdd:pfam00115 317 IIGGLTGVMLALPPVNYYVHDTYFVVAHFHYVLFGGVVFALFGGIYYWLPKLTGRMYSEKLGKLHFWLLFIGFNLTFFPM 396
                         330       340       350
                  ....*....|....*....|....*....|....*.
gi 528749159  320 HFLGLAGMPRRYS----DYPDVYTSWNVLSSIGSTI 351
Cdd:pfam00115 397 HILGLLGMPRRYAppfiETVPAFQPLNWIRTIGGVL 432
QoxB TIGR02882
cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type ...
16-351 2.99e-82

cytochrome aa3 quinol oxidase, subunit I; This family (QoxB) encodes subunit I of the aa3-type quinone oxidase, one of several bacterial terminal oxidases. This complex couples oxidation of reduced quinones with the reduction of molecular oxygen to water and the pumping of protons to form a proton gradient utilized for ATP production. aa3-type oxidases contain two heme a cofactors as well as copper atoms in the active site. [Energy metabolism, Electron transport]


Pssm-ID: 131928  Cd Length: 643  Bit Score: 263.64  E-value: 2.99e-82
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   16 GWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAITALLLLLSLPVLAG 95
Cdd:TIGR02882 162 GWTNYAPLAGPEFSPGVGVNYYLIALQISGIGTLMTGINFFVTILKMRAPGMKLMQMPMFTWTTLITTLIIIFAFPVLTV 241
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159   96 AITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESgKKEAFGTLGMIYAMLAIGLLG 175
Cdd:TIGR02882 242 ALALMTTDRIFDTAFFTVAHGGMPMLWANLFWIWGHPEVYIVILPAFGIYSEIISTFA-QKRLFGYKSMVWSTVGIAFLS 320
                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  176 FVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTIGGLTGVVLANSSID 255
Cdd:TIGR02882 321 FLVWVHHFFTMGNGALINSFFSITTMAIAIPTGVKIFNWLLTLYKGKIRFTTPMLFSLAFIPNFLIGGVTGVMLAMASAD 400
                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  256 IILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHFLGLAGMPRRYSDY- 334
Cdd:TIGR02882 401 YQYHNTYFLVAHFHYVLITGVVFACLAGLIYWYPKMFGYKLNERLGKWCFWFFMIGFNVCFFPMYILGLDGMPRRMYTYs 480
                         330
                  ....*....|....*...
gi 528749159  335 -PDVYTSWNVLSSIGSTI 351
Cdd:TIGR02882 481 pSDGWFPLNLISTIGALL 498
PRK15017 PRK15017
cytochrome o ubiquinol oxidase subunit I; Provisional
13-336 5.27e-79

cytochrome o ubiquinol oxidase subunit I; Provisional


Pssm-ID: 184978  Cd Length: 663  Bit Score: 255.63  E-value: 5.27e-79
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  13 AGTGWTVYPPLSAGIAHGGASVDLAIFSLHLAGISSILGAVNFITTTINMRTPGMSLDQTPLFVWSVAITALLLLLSLPV 92
Cdd:PRK15017 166 AQTGWLAYPPLSGIEYSPGVGVDYWIWSLQLSGIGTTLTGINFFVTILKMRAPGMTMFKMPVFTWASLCANVLIIASFPI 245
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159  93 LAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESgKKEAFGTLGMIYAMLAIG 172
Cdd:PRK15017 246 LTVTVALLTLDRYLGTHFFTNDMGGNMMMYINLIWAWGHPEVYILILPVFGVFSEIAATFS-RKRLFGYTSLVWATVCIT 324
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 173 LLGFVVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLHGTQLTYSPALLWALGFVFLFTIGGLTGVVLANS 252
Cdd:PRK15017 325 VLSFIVWLHHFFTMGAGANVNAFFGITTMIIAIPTGVKIFNWLFTMYQGRIVFHSAMLWTIGFIVTFSVGGMTGVLLAVP 404
                        250       260       270       280       290       300       310       320
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 253 SIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFIQWYPLFTGLSLNPKWLTIQFMIMFMGVNLTFFPQHFLGLAGMPRRYS 332
Cdd:PRK15017 405 GADFVLHNSLFLIAHFHNVIIGGVVFGCFAGMTYWWPKAFGFKLNETWGKRAFWFWIIGFFVAFMPLYALGFMGMTRRLS 484

                 ....
gi 528749159 333 DYPD 336
Cdd:PRK15017 485 QQID 488
ba3-like_Oxidase_I cd01660
ba3-like heme-copper oxidase subunit I. The ba3 family of heme-copper oxidases are ...
118-353 1.10e-18

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: 87.34  E-value: 1.10e-18
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 118 DPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKEAFGTLGMIyAMLAIGLLGFVVWAHHMFT-VGMDVDTRAYF 196
Cdd:cd01660  200 DVLLSRTLFWWFGHPLVYFWLLPAYIAWYTILPKIAGGKLFSDPLARL-AFILFLLFSTPVGFHHQFAdPGIGPGWKFIH 278
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 197 TSATMIIAVPTGIKIFSWLATL-HGTQLTYSPALLW---------------ALGFVFlFTIGGLTGVVLANSSIDIILHD 260
Cdd:cd01660  279 MVLTFMVALPSLLTAFTVFASLeIAGRLRGGKGLFGwiralpwgdpmflalFLAMLM-FIPGGAGGIINASYQLNYVVHN 357
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 528749159 261 TYYVVAHFHyvLSMGAVFAIMAGFIQWY--PLFTGLSLNPKWLTI-QFMIMFMGVNLTFFPQHFLGLAGMPRR--YSDYP 335
Cdd:cd01660  358 TAWVPGHFH--LTVGGAVALTFMAVAYWlvPHLTGRELAAKRLALaQPWLWFVGMTIMSTAMHVAGLLGAPRRtaEAQYG 435
                        250       260
                 ....*....|....*....|...
gi 528749159 336 DVY-----TSWNVLSSIGSTISF 353
Cdd:cd01660  436 GLPaagewAPYQQLMAIGGTILF 458
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

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