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Conserved domains on  [gi|570291761|gb|AHE73784|]
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cytochrome b, partial (mitochondrion) [Caledonula amedegnatae]

Protein Classification

cytochrome b( domain architecture ID 999997)

cytochrome b is a component of the ubiquinol-cytochrome c reductase complex (complex III or cytochrome b-c1 complex) that is part of the mitochondrial respiratory chain; contributes to the generation of a proton gradient across the mitochondrial membrane that is then used for ATP synthesis

CATH:  1.20.810.10
Gene Symbol:  CYTB
Gene Ontology:  GO:0009055|GO:0046872|GO:0022904|GO:0005743|GO:0020037
PubMed:  2509716|8329437
SCOP:  4002208

Graphical summary

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List of domain hits

 Name Accession Description Interval E-value
CYTB super family cl33360
cytochrome b; Provisional
 1-115 4.14e-75

cytochrome b; Provisional


The actual alignment was detected with superfamily member MTH00156:

Pssm-ID: 214440 [Multi-domain]  Cd Length: 356  Bit Score: 226.20  E-value: 4.14e-75
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00156 157 GFSVDNATLTRFFTFHFLLPFIILAMVMIHLLFLHQTGSNNPLGLNSNIDKIPFHPYFTFKDLVGFIIMLMLLILLTLIN 236

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00156 237 PYLLGDPENFIPANPLVTPVHIQPEWYFLFAYAIL 271
 
Name Accession Description Interval E-value
CYTB MTH00156
cytochrome b; Provisional
 1-115 4.14e-75

cytochrome b; Provisional


Pssm-ID: 214440 [Multi-domain]  Cd Length: 356  Bit Score: 226.20  E-value: 4.14e-75
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00156 157 GFSVDNATLTRFFTFHFLLPFIILAMVMIHLLFLHQTGSNNPLGLNSNIDKIPFHPYFTFKDLVGFIIMLMLLILLTLIN 236

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00156 237 PYLLGDPENFIPANPLVTPVHIQPEWYFLFAYAIL 271
QcrB/PetB COG1290
Cytochrome b subunit of the bc complex [Energy production and conversion];
1-115 1.63e-32

Cytochrome b subunit of the bc complex [Energy production and conversion];


Pssm-ID: 440901 [Multi-domain]  Cd Length: 393  Bit Score: 116.81  E-value: 1.63e-32
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFH-FVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEK----IPFHPYFTFKDSITFVLMtsMLVI 75
Cdd:COG1290  178 GEFPGDATLNRFFALHvLLLPALLLALVVLHLWLLHRHGHNNPPGPERKKTEkvdgVPFHPYYTVKDGFGFFVF--LGVF 255

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|
gi 570291761  76 LCLINPYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:COG1290  256 ALLAFFFPINPPPNYGPANPLATPAHIQPDWYFLPFYGIL 295
cytochrome_b_C cd00290
Cytochrome b(C-terminus)/b6/petD: Cytochrome b is a subunit of cytochrome bc1, an 11-subunit ...
 41-115 4.24e-25

Cytochrome b(C-terminus)/b6/petD: Cytochrome b is a subunit of cytochrome bc1, an 11-subunit mitochondrial respiratory enzyme. Cytochrome b spans the mitochondrial membrane with 8 transmembrane helices (A-H) in eukaryotes. In plants and cyanobacteria, cytochrome b6 is analogous to eukaryote cytochrome b, containing two chains: helices A-D are encoded by the petB gene and helices E-H are encoded by the petD gene in these organisms. Cytochrome b/b6 contains two bound hemes and two ubiquinol/ubiquinone binding sites. The C-terminal domain is involved in forming the ubiquinol/ubiquinone binding sites, but not the heme binding sites. The N-terminal portion of cytochrome b, which contains both heme binding sites, is described in a separate CD.


Pssm-ID: 238179 [Multi-domain]  Cd Length: 147  Bit Score: 91.94  E-value: 4.24e-25
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 570291761  41 NPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLINPYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:cd00290    1 NPLGLASDMDKISFHPYFWPKDLLGAFPILIIFMILVFYAPNLLGHPDNGIPANPLATPLHILPEWYFLPVYAIL 75
Cytochrom_B_N_2 pfam13631
Cytochrome b(N-terminal)/b6/petB;
1-87 4.44e-17

Cytochrome b(N-terminal)/b6/petB;


Pssm-ID: 433364  Cd Length: 169  Bit Score: 71.89  E-value: 4.44e-17
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761    1 GFAVDNATLNRFFTFHF-VLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLI 79
Cdd:pfam13631  82 GPFPGTATIPRFYALHIlLLPGLILALIVAHLLLVEKHGQFPPPGTEKNVVGVPFWPVFAVKMLLFFLITVALLIGLAQI 161


                  ....*...
gi 570291761   80 NPYLLGDP 87
Cdd:pfam13631 162 NPIWLGGP 169
 
Name Accession Description Interval E-value
CYTB MTH00156
cytochrome b; Provisional
 1-115 4.14e-75

cytochrome b; Provisional


Pssm-ID: 214440 [Multi-domain]  Cd Length: 356  Bit Score: 226.20  E-value: 4.14e-75
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00156 157 GFSVDNATLTRFFTFHFLLPFIILAMVMIHLLFLHQTGSNNPLGLNSNIDKIPFHPYFTFKDLVGFIIMLMLLILLTLIN 236

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00156 237 PYLLGDPENFIPANPLVTPVHIQPEWYFLFAYAIL 271
CYTB MTH00145
cytochrome b; Provisional
 1-115 8.01e-66

cytochrome b; Provisional


Pssm-ID: 177203 [Multi-domain]  Cd Length: 379  Bit Score: 203.21  E-value: 8.01e-66
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00145 168 GFSVGNATLKRFFSLHFLLPFVILGLSVLHLLFLHETGSNNPLGLDSDGDKVPFHPYYTIKDLVGFVVLLFLLVFLVLFF 247

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00145 248 PNLLGDPENFIPANPMVTPVHIQPEWYFLFAYAIL 282
CYTB MTH00119
cytochrome b; Provisional
 1-115 1.94e-64

cytochrome b; Provisional


Pssm-ID: 214425 [Multi-domain]  Cd Length: 380  Bit Score: 199.36  E-value: 1.94e-64
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00119 168 GFSVDNPTLTRFFALHFLLPFLIAGLTLIHLLFLHETGSNNPLGLNSNTDKIPFHPYFSYKDLLGLTLMLTLLLTLALFS 247

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00119 248 PNLLGDPENFTPANPLVTPPHIKPEWYFLFAYAIL 282
CYTB MTH00191
cytochrome b; Provisional
 1-115 4.96e-64

cytochrome b; Provisional


Pssm-ID: 177239 [Multi-domain]  Cd Length: 365  Bit Score: 198.22  E-value: 4.96e-64
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00191 164 GFSVDNATLTRFFTFHFLLPFLIAALSLIHLLFLHETGSNNPLGLNSDSDKIPFHPYFSYKDILGFFILLFLLLFLVLFS 243

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00191 244 PNLLGDPENFIPANPLVTPVHIKPEWYFLFAYAIL 278
CYTB MTH00131
cytochrome b; Provisional
 1-115 2.03e-63

cytochrome b; Provisional


Pssm-ID: 177189 [Multi-domain]  Cd Length: 380  Bit Score: 196.80  E-value: 2.03e-63
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00131 167 GFSVDNATLTRFFAFHFLFPFVIAAATILHLLFLHETGSNNPLGLNSDADKISFHPYFSYKDLLGFAILLLALTSLALFS 246

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00131 247 PNLLGDPDNFTPANPLVTPPHIKPEWYFLFAYAIL 281
CYTB MTH00074
cytochrome b; Provisional
 1-115 2.81e-63

cytochrome b; Provisional


Pssm-ID: 177145 [Multi-domain]  Cd Length: 380  Bit Score: 196.44  E-value: 2.81e-63
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00074 168 GFSVDKATLTRFFAFHFLLPFLIAGASIIHLLFLHETGSNNPTGLNSNPDKVPFHPYFSYKDLLGFLIMLTALALLSLFS 247

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00074 248 PNLLGDPDNFTPANPLVTPPHIQPEWYFLFAYAIL 282
CYTB MTH00100
cytochrome b; Provisional
 1-115 2.29e-60

cytochrome b; Provisional


Pssm-ID: 177162 [Multi-domain]  Cd Length: 379  Bit Score: 189.08  E-value: 2.29e-60
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00100 167 GFSVDKATLTRFFAFHFILPFIITALAMVHLLFLHETGSNNPSGIPSDSDKIPFHPYYTIKDILGLLLLILTLMLLVLFS 246

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00100 247 PDLLGDPDNYTPANPLNTPPHIKPEWYFLFAYAIL 281
CYTB MTH00016
cytochrome b; Validated
 1-115 1.92e-59

cytochrome b; Validated


Pssm-ID: 177102 [Multi-domain]  Cd Length: 378  Bit Score: 186.81  E-value: 1.92e-59
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00016 168 GFSVDNATLTRFFALHFLLPFVIAALSMIHLLFLHQTGSNNPLGVNSNSDKVPFHPYYTSKDIVGFIVMLFLLLSVVLLW 247

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00016 248 PNILGDPENFIPANPLVTPTHIKPEWYFLWAYAIL 282
CYTB MTH00034
cytochrome b; Validated
 1-115 5.73e-56

cytochrome b; Validated


Pssm-ID: 177109 [Multi-domain]  Cd Length: 379  Bit Score: 177.59  E-value: 5.73e-56
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00034 167 GFSVDNATLTRFFAFHFLFPFIIAALSIIHLLFLHQTGSNNPTGLNSNYDKVPFHTYFTTKDLVGFLILFAALSSLALLF 246

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00034 247 PTALNDPENFIPANPLVTPPHIQPEWYFLFAYAIL 281
CYTB MTH00224
cytochrome b; Provisional
 1-115 1.50e-50

cytochrome b; Provisional


Pssm-ID: 164767 [Multi-domain]  Cd Length: 379  Bit Score: 163.94  E-value: 1.50e-50
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00224 168 GFAVDNATLNRFFSFHFLLPFAIMGATILHIMFLHQTGSNNPIGINADSARIPFHPYYSIKDALGYLIAILLLSLMVLFE 247

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00224 248 PNLFTDPENFLMANPLVTPIHIKPEWYFLWMYAIL 282
CYTB MTH00053
cytochrome b; Provisional
 1-115 2.65e-47

cytochrome b; Provisional


Pssm-ID: 164624 [Multi-domain]  Cd Length: 381  Bit Score: 155.63  E-value: 2.65e-47
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00053 168 GFSVSNATLNRFYSLHYLLPFILAGLALVHLIALHEDGSNNPIGVRSDIDKIPFHYYYVLKDLYGAVILLIILSIIVFLF 247

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00053 248 PYSLGDAENFKQANPLVTPVHIKPEWYFLFAYAIL 282
CYTB MTH00022
cytochrome b; Validated
 1-115 6.97e-47

cytochrome b; Validated


Pssm-ID: 164595 [Multi-domain]  Cd Length: 379  Bit Score: 154.47  E-value: 6.97e-47
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLIN 80
Cdd:MTH00022 166 GFSVSNATLNRFFSLHFLFPFILAFLVIVHLIYLHVDGSNNPIGLNSSVDKVSFHVYYTSKDWYGIVVLFFLLSFIVYFA 245

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00022 246 PNLLGDPENFIQANSLVTPVHIQPEWYFLFAYAIL 280
CYTB MTH00086
cytochrome b; Provisional
 1-115 7.52e-37

cytochrome b; Provisional


Pssm-ID: 177151 [Multi-domain]  Cd Length: 355  Bit Score: 127.75  E-value: 7.52e-37
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTsMLVILCLIN 80
Cdd:MTH00086 156 GFGVSSATLKFFFVLHFLLPWGLLVLVLFHLIFLHSTGSTSSLYCHGDYDKICFGPEYWNKDAYNIIFWL-VFIIFSLFY 234

                         90       100       110
                 ....*....|....*....|....*....|....*
gi 570291761  81 PYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00086 235 PFNLGDPEMFIEADPMMSPVHIVPEWYFLFAYAIL 269
CYTB MTH00033
cytochrome b; Provisional
 1-115 8.06e-35

cytochrome b; Provisional


Pssm-ID: 133672 [Multi-domain]  Cd Length: 383  Bit Score: 123.12  E-value: 8.06e-35
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILClIN 80
Cdd:MTH00033 164 GFSVSNCTLNRFFSLHYLLPFVLVGLVLAHLLTLHEKGSNEPLGLVGLSDRTAFHVYFTIKDILGFLILFGVFVIIG-IE 242

                         90       100       110
                 ....*....|....*....|....*....|....*...
gi 570291761  81 PY---LLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00033 243 PRietLLQDPENFIQANPLVTPVHIQPEWYFLFAYAIL 280
QcrB/PetB COG1290
Cytochrome b subunit of the bc complex [Energy production and conversion];
1-115 1.63e-32

Cytochrome b subunit of the bc complex [Energy production and conversion];


Pssm-ID: 440901 [Multi-domain]  Cd Length: 393  Bit Score: 116.81  E-value: 1.63e-32
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFH-FVLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEK----IPFHPYFTFKDSITFVLMtsMLVI 75
Cdd:COG1290  178 GEFPGDATLNRFFALHvLLLPALLLALVVLHLWLLHRHGHNNPPGPERKKTEkvdgVPFHPYYTVKDGFGFFVF--LGVF 255

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|
gi 570291761  76 LCLINPYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:COG1290  256 ALLAFFFPINPPPNYGPANPLATPAHIQPDWYFLPFYGIL 295
CYTB MTH00046
cytochrome b; Validated
 1-115 6.63e-29

cytochrome b; Validated


Pssm-ID: 177121 [Multi-domain]  Cd Length: 355  Bit Score: 106.61  E-value: 6.63e-29
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSNNPLGL-NGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLI 79
Cdd:MTH00046 158 GFSVTGVTLVRVFSVHICLGFVILGLMVVHLFYLHKSGSSNPLFSsNGYSDVVYFHSYFTVKDLFLFMVVCSLLVFWLFV 237

                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 570291761  80 NPYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:MTH00046 238 SPDLVLDIEAYLEADPLVTPVSIKPEWYFLAFYAML 273
cytochrome_b_C cd00290
Cytochrome b(C-terminus)/b6/petD: Cytochrome b is a subunit of cytochrome bc1, an 11-subunit ...
 41-115 4.24e-25

Cytochrome b(C-terminus)/b6/petD: Cytochrome b is a subunit of cytochrome bc1, an 11-subunit mitochondrial respiratory enzyme. Cytochrome b spans the mitochondrial membrane with 8 transmembrane helices (A-H) in eukaryotes. In plants and cyanobacteria, cytochrome b6 is analogous to eukaryote cytochrome b, containing two chains: helices A-D are encoded by the petB gene and helices E-H are encoded by the petD gene in these organisms. Cytochrome b/b6 contains two bound hemes and two ubiquinol/ubiquinone binding sites. The C-terminal domain is involved in forming the ubiquinol/ubiquinone binding sites, but not the heme binding sites. The N-terminal portion of cytochrome b, which contains both heme binding sites, is described in a separate CD.


Pssm-ID: 238179 [Multi-domain]  Cd Length: 147  Bit Score: 91.94  E-value: 4.24e-25
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 570291761  41 NPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLINPYLLGDPDNFVPANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:cd00290    1 NPLGLASDMDKISFHPYFWPKDLLGAFPILIIFMILVFYAPNLLGHPDNGIPANPLATPLHILPEWYFLPVYAIL 75
Cytochrom_B_N_2 pfam13631
Cytochrome b(N-terminal)/b6/petB;
1-87 4.44e-17

Cytochrome b(N-terminal)/b6/petB;


Pssm-ID: 433364  Cd Length: 169  Bit Score: 71.89  E-value: 4.44e-17
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 570291761    1 GFAVDNATLNRFFTFHF-VLPFMIAAMAAIHLLFLHQTGSNNPLGLNGDIEKIPFHPYFTFKDSITFVLMTSMLVILCLI 79
Cdd:pfam13631  82 GPFPGTATIPRFYALHIlLLPGLILALIVAHLLLVEKHGQFPPPGTEKNVVGVPFWPVFAVKMLLFFLITVALLIGLAQI 161


                  ....*...
gi 570291761   80 NPYLLGDP 87
Cdd:pfam13631 162 NPIWLGGP 169
Cytochrome_b_N cd00284
Cytochrome b (N-terminus)/b6/petB: Cytochrome b is a subunit of cytochrome bc1, an 11-subunit ...
 1-40 3.92e-11

Cytochrome b (N-terminus)/b6/petB: Cytochrome b is a subunit of cytochrome bc1, an 11-subunit mitochondrial respiratory enzyme. Cytochrome b spans the mitochondrial membrane with 8 transmembrane helices (A-H) in eukaryotes. In plants and cyanobacteria, cytochrome b6 is analogous to eukaryote cytochrome b, containing two chains: helices A-D are encoded by the petB gene and helices E-H are encoded by the petD gene in these organisms. Cytochrome b/b6 contains two bound hemes and two ubiquinol/ubiquinone binding sites. The C-terminal portion of cytochrome b is described in a separate CD.


Pssm-ID: 238176  Cd Length: 200  Bit Score: 56.99  E-value: 3.92e-11
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|
gi 570291761   1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTGSN 40
Cdd:cd00284  161 GFSVDNATLTRFFALHFLLPFIIAVIVILHLLFLHEQGSS 200
Cytochrom_B_C pfam00032
Cytochrome b(C-terminal)/b6/petD;
92-115 7.57e-11

Cytochrome b(C-terminal)/b6/petD;


Pssm-ID: 459640 [Multi-domain]  Cd Length: 101  Bit Score: 54.41  E-value: 7.57e-11
                          10        20
                  ....*....|....*....|....
gi 570291761   92 PANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:pfam00032   1 PANPLVTPAHIVPEWYFLPFYAIL 24
Cytochrome_B pfam00033
Cytochrome b/b6/petB;
1-38 2.09e-09

Cytochrome b/b6/petB;


Pssm-ID: 306530  Cd Length: 189  Bit Score: 52.38  E-value: 2.09e-09
                          10        20        30
                  ....*....|....*....|....*....|....*...
gi 570291761    1 GFAVDNATLNRFFTFHFVLPFMIAAMAAIHLLFLHQTG 38
Cdd:pfam00033 152 SFSVDQATLTRFFSLHFLLPFILAILMLLHLLFLHETG 189
petD CHL00058
cytochrome b6/f complex subunit IV
 73-115 5.02e-03

cytochrome b6/f complex subunit IV


Pssm-ID: 176998  Cd Length: 160  Bit Score: 34.59  E-value: 5.02e-03
                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 570291761  73 LVILCLINPYLLGDPdnfvpANPLVTPVHIQPEWYFLFAYAIL 115
Cdd:CHL00058  51 NVGLAVLEPSMIGEP-----ADPFATPLEILPEWYFFPVFQIL 88
 
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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