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5XTE

Cryo-EM structure of human respiratory complex III (cytochrome bc1 complex)

Functional Information from GO Data
ChainGOidnamespacecontents
A0005739cellular_componentmitochondrion
A0005743cellular_componentmitochondrial inner membrane
A0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
A0016020cellular_componentmembrane
A0021539biological_processsubthalamus development
A0021548biological_processpons development
A0021680biological_processcerebellar Purkinje cell layer development
A0021766biological_processhippocampus development
A0021794biological_processthalamus development
A0021854biological_processhypothalamus development
A0021860biological_processpyramidal neuron development
A0022904biological_processrespiratory electron transport chain
A0030901biological_processmidbrain development
A0045275cellular_componentrespiratory chain complex III
A0045333biological_processcellular respiration
B0008121molecular_functionquinol-cytochrome-c reductase activity
C0008121molecular_functionquinol-cytochrome-c reductase activity
C0016020cellular_componentmembrane
C0051537molecular_function2 iron, 2 sulfur cluster binding
D0005515molecular_functionprotein binding
D0005739cellular_componentmitochondrion
D0005743cellular_componentmitochondrial inner membrane
D0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
D0008121molecular_functionquinol-cytochrome-c reductase activity
D0016020cellular_componentmembrane
D0022904biological_processrespiratory electron transport chain
D0045275cellular_componentrespiratory chain complex III
D0045333biological_processcellular respiration
D1902600biological_processproton transmembrane transport
E0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
F0005515molecular_functionprotein binding
F0005739cellular_componentmitochondrion
F0005743cellular_componentmitochondrial inner membrane
F0006119biological_processoxidative phosphorylation
F0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
F0009060biological_processaerobic respiration
F0016020cellular_componentmembrane
F0022904biological_processrespiratory electron transport chain
F0045275cellular_componentrespiratory chain complex III
F0045333biological_processcellular respiration
F0098803cellular_componentrespiratory chain complex
G0005739cellular_componentmitochondrion
G0005743cellular_componentmitochondrial inner membrane
G0006091biological_processgeneration of precursor metabolites and energy
G0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
G0009055molecular_functionelectron transfer activity
G0022904biological_processrespiratory electron transport chain
G0045275cellular_componentrespiratory chain complex III
G0045333biological_processcellular respiration
H0009055molecular_functionelectron transfer activity
H0020037molecular_functionheme binding
J0001666biological_processresponse to hypoxia
J0005739cellular_componentmitochondrion
J0005743cellular_componentmitochondrial inner membrane
J0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
J0007584biological_processresponse to nutrient
J0008121molecular_functionquinol-cytochrome-c reductase activity
J0009055molecular_functionelectron transfer activity
J0009410biological_processresponse to xenobiotic stimulus
J0009636biological_processresponse to toxic substance
J0009725biological_processresponse to hormone
J0015990biological_processelectron transport coupled proton transport
J0016020cellular_componentmembrane
J0016491molecular_functionoxidoreductase activity
J0022904biological_processrespiratory electron transport chain
J0031100biological_processanimal organ regeneration
J0032991cellular_componentprotein-containing complex
J0033590biological_processresponse to cobalamin
J0033762biological_processresponse to glucagon
J0044877molecular_functionprotein-containing complex binding
J0045275cellular_componentrespiratory chain complex III
J0045333biological_processcellular respiration
J0045471biological_processresponse to ethanol
J0046686biological_processresponse to cadmium ion
J0046688biological_processresponse to copper ion
J0046689biological_processresponse to mercury ion
J0046872molecular_functionmetal ion binding
J0051592biological_processresponse to calcium ion
J0055093biological_processresponse to hyperoxia
J1904421biological_processresponse to D-galactosamine
K0004222molecular_functionmetalloendopeptidase activity
K0005515molecular_functionprotein binding
K0005739cellular_componentmitochondrion
K0005743cellular_componentmitochondrial inner membrane
K0006119biological_processoxidative phosphorylation
K0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
K0006508biological_processproteolysis
K0009060biological_processaerobic respiration
K0022904biological_processrespiratory electron transport chain
K0045275cellular_componentrespiratory chain complex III
K0045333biological_processcellular respiration
K0046872molecular_functionmetal ion binding
L0005515molecular_functionprotein binding
L0005739cellular_componentmitochondrion
L0005743cellular_componentmitochondrial inner membrane
L0006119biological_processoxidative phosphorylation
L0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
L0006627biological_processobsolete protein processing involved in protein targeting to mitochondrion
L0008121molecular_functionquinol-cytochrome-c reductase activity
L0009060biological_processaerobic respiration
L0014823biological_processresponse to activity
L0016020cellular_componentmembrane
L0017087cellular_componentmitochondrial processing peptidase complex
L0022904biological_processrespiratory electron transport chain
L0031625molecular_functionubiquitin protein ligase binding
L0043279biological_processresponse to alkaloid
L0044877molecular_functionprotein-containing complex binding
L0045275cellular_componentrespiratory chain complex III
L0045333biological_processcellular respiration
L0046872molecular_functionmetal ion binding
L0098803cellular_componentrespiratory chain complex
L1902600biological_processproton transmembrane transport
N0005739cellular_componentmitochondrion
N0005743cellular_componentmitochondrial inner membrane
N0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
N0016020cellular_componentmembrane
N0021539biological_processsubthalamus development
N0021548biological_processpons development
N0021680biological_processcerebellar Purkinje cell layer development
N0021766biological_processhippocampus development
N0021794biological_processthalamus development
N0021854biological_processhypothalamus development
N0021860biological_processpyramidal neuron development
N0022904biological_processrespiratory electron transport chain
N0030901biological_processmidbrain development
N0045275cellular_componentrespiratory chain complex III
N0045333biological_processcellular respiration
O0008121molecular_functionquinol-cytochrome-c reductase activity
P0008121molecular_functionquinol-cytochrome-c reductase activity
P0016020cellular_componentmembrane
P0051537molecular_function2 iron, 2 sulfur cluster binding
Q0005515molecular_functionprotein binding
Q0005739cellular_componentmitochondrion
Q0005743cellular_componentmitochondrial inner membrane
Q0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
Q0008121molecular_functionquinol-cytochrome-c reductase activity
Q0016020cellular_componentmembrane
Q0022904biological_processrespiratory electron transport chain
Q0045275cellular_componentrespiratory chain complex III
Q0045333biological_processcellular respiration
Q1902600biological_processproton transmembrane transport
R0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
S0005515molecular_functionprotein binding
S0005739cellular_componentmitochondrion
S0005743cellular_componentmitochondrial inner membrane
S0006119biological_processoxidative phosphorylation
S0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
S0009060biological_processaerobic respiration
S0016020cellular_componentmembrane
S0022904biological_processrespiratory electron transport chain
S0045275cellular_componentrespiratory chain complex III
S0045333biological_processcellular respiration
S0098803cellular_componentrespiratory chain complex
T0005739cellular_componentmitochondrion
T0005743cellular_componentmitochondrial inner membrane
T0006091biological_processgeneration of precursor metabolites and energy
T0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
T0009055molecular_functionelectron transfer activity
T0022904biological_processrespiratory electron transport chain
T0045275cellular_componentrespiratory chain complex III
T0045333biological_processcellular respiration
U0009055molecular_functionelectron transfer activity
U0020037molecular_functionheme binding
V0001666biological_processresponse to hypoxia
V0005739cellular_componentmitochondrion
V0005743cellular_componentmitochondrial inner membrane
V0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
V0007584biological_processresponse to nutrient
V0008121molecular_functionquinol-cytochrome-c reductase activity
V0009055molecular_functionelectron transfer activity
V0009410biological_processresponse to xenobiotic stimulus
V0009636biological_processresponse to toxic substance
V0009725biological_processresponse to hormone
V0015990biological_processelectron transport coupled proton transport
V0016020cellular_componentmembrane
V0016491molecular_functionoxidoreductase activity
V0022904biological_processrespiratory electron transport chain
V0031100biological_processanimal organ regeneration
V0032991cellular_componentprotein-containing complex
V0033590biological_processresponse to cobalamin
V0033762biological_processresponse to glucagon
V0044877molecular_functionprotein-containing complex binding
V0045275cellular_componentrespiratory chain complex III
V0045333biological_processcellular respiration
V0045471biological_processresponse to ethanol
V0046686biological_processresponse to cadmium ion
V0046688biological_processresponse to copper ion
V0046689biological_processresponse to mercury ion
V0046872molecular_functionmetal ion binding
V0051592biological_processresponse to calcium ion
V0055093biological_processresponse to hyperoxia
V1904421biological_processresponse to D-galactosamine
W0004222molecular_functionmetalloendopeptidase activity
W0005515molecular_functionprotein binding
W0005739cellular_componentmitochondrion
W0005743cellular_componentmitochondrial inner membrane
W0006119biological_processoxidative phosphorylation
W0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
W0006508biological_processproteolysis
W0009060biological_processaerobic respiration
W0022904biological_processrespiratory electron transport chain
W0045275cellular_componentrespiratory chain complex III
W0045333biological_processcellular respiration
W0046872molecular_functionmetal ion binding
Y0005515molecular_functionprotein binding
Y0005739cellular_componentmitochondrion
Y0005743cellular_componentmitochondrial inner membrane
Y0006119biological_processoxidative phosphorylation
Y0006122biological_processmitochondrial electron transport, ubiquinol to cytochrome c
Y0006627biological_processobsolete protein processing involved in protein targeting to mitochondrion
Y0008121molecular_functionquinol-cytochrome-c reductase activity
Y0009060biological_processaerobic respiration
Y0014823biological_processresponse to activity
Y0016020cellular_componentmembrane
Y0017087cellular_componentmitochondrial processing peptidase complex
Y0022904biological_processrespiratory electron transport chain
Y0031625molecular_functionubiquitin protein ligase binding
Y0043279biological_processresponse to alkaloid
Y0044877molecular_functionprotein-containing complex binding
Y0045275cellular_componentrespiratory chain complex III
Y0045333biological_processcellular respiration
Y0046872molecular_functionmetal ion binding
Y0098803cellular_componentrespiratory chain complex
Y1902600biological_processproton transmembrane transport
Functional Information from PDB Data
site_idAC1
Number of Residues8
Detailsbinding site for residue CDL A 101
ChainResidue
AARG41
AILE42
ASER45
FHIS73
HCDL403
JALA29
JPHE33
JPEE403

site_idAC2
Number of Residues6
Detailsbinding site for residue FES C 301
ChainResidue
CHIS219
CLEU220
CCYS236
CHIS239
CSER241
CCYS217

site_idAC3
Number of Residues8
Detailsbinding site for residue CDL G 101
ChainResidue
CVAL137
CSER141
GASP37
GTRP38
GARG39
VTYR155
VILE156
VTRP163

site_idAC4
Number of Residues10
Detailsbinding site for residue PEE H 401
ChainResidue
CASN131
CALA132
CPHE136
DASP37
HHIS284
HMET288
HLYS291
JLEU236
JMET240
LPLX501

site_idAC5
Number of Residues17
Detailsbinding site for residue HEC H 402
ChainResidue
HVAL120
HCYS121
HCYS124
HHIS125
HASN189
HLEU197
HILE200
HARG204
HTYR210
HLEU214
HPHE237
HILE242
HALA243
HMET244
HPRO247
HVAL270
PHIS239

site_idAC6
Number of Residues14
Detailsbinding site for residue CDL H 403
ChainResidue
AASN37
AARG41
ACDL101
FLYS72
FHIS73
HTYR304
HLYS307
HARG308
HLYS315
JASN32
JLYS227
JLEU230
JLEU234
JSER238

site_idAC7
Number of Residues15
Detailsbinding site for residue HEM J 401
ChainResidue
JLEU41
JGLN44
JILE45
JGLY48
JLEU51
JALA52
JARG80
JHIS83
JGLY130
JLEU133
JPRO134
JHIS182
JPHE183
JPRO186
JTYR273

site_idAC8
Number of Residues16
Detailsbinding site for residue HEM J 402
ChainResidue
JTRP31
JGLY34
JSER35
JLEU37
JHIS97
JILE98
JARG100
JSER106
JTYR109
JTRP113
JGLY116
JLEU119
JHIS196
JLEU200
JSER205
JASN206

site_idAC9
Number of Residues15
Detailsbinding site for residue PEE J 403
ChainResidue
JPHE95
JLEU96
JGLY99
JARG100
JTYR103
JTYR104
JMET316
JTYR325
JTRP326
JLEU332
AGLU44
AVAL49
ACDL101
JTRP30
JILE92

site_idAD1
Number of Residues10
Detailsbinding site for residue CDL J 404
ChainResidue
JTHR194
JLEU195
JLEU197
JLEU198
JHIS201
VLEU13
VSER17
VTHR194
VLEU198
VHIS201

site_idAD2
Number of Residues8
Detailsbinding site for residue CDL J 405
ChainResidue
JASP159
JLEU160
JTRP163
PTHR134
PVAL137
PSER138
TTHR36
YPEE502

site_idAD3
Number of Residues10
Detailsbinding site for residue PLX L 501
ChainResidue
CTYR115
CTHR118
DPHE15
DTHR18
DPHE21
DALA22
HPEE401
JALA229
LPHE476
LPEE503

site_idAD4
Number of Residues10
Detailsbinding site for residue CDL L 502
ChainResidue
JARG5
JPHE18
JILE19
JHIS221
LPHE370
LARG470
LTRP477
LLEU478
LARG479
LPEE503

site_idAD5
Number of Residues5
Detailsbinding site for residue PEE L 503
ChainResidue
JHIS221
LSER473
LPHE476
LPLX501
LCDL502

site_idAD6
Number of Residues7
Detailsbinding site for residue CDL N 101
ChainResidue
NARG41
NSER45
SHIS73
UCDL403
VALA29
VPHE33
VPEE403

site_idAD7
Number of Residues8
Detailsbinding site for residue FES P 301
ChainResidue
PCYS217
PHIS219
PLEU220
PCYS222
PCYS236
PCYS238
PHIS239
PSER241

site_idAD8
Number of Residues12
Detailsbinding site for residue PLX Q 101
ChainResidue
PTYR115
PTHR118
PTHR122
PVAL125
QPHE15
QARG16
QTHR18
QPHE21
QALA22
YPHE476
YCDL501
YPEE502

site_idAD9
Number of Residues3
Detailsbinding site for residue PLX T 101
ChainResidue
TARG9
TLEU13
YTRP477

site_idAE1
Number of Residues9
Detailsbinding site for residue PEE U 401
ChainResidue
PTYR127
PALA128
PASN131
UMET288
ULYS291
UMET295
UMET296
VLEU236
VMET240

site_idAE2
Number of Residues15
Detailsbinding site for residue HEC U 402
ChainResidue
CHIS239
UVAL120
UCYS121
UCYS124
UHIS125
UILE200
UARG204
UTYR210
ULEU214
ULEU215
UPHE237
UILE242
UMET244
UPRO247
UVAL270

site_idAE3
Number of Residues11
Detailsbinding site for residue CDL U 403
ChainResidue
NVAL30
NCDL101
UPRO301
UTYR304
ULYS307
UARG308
ULYS315
VLEU36
VLYS227
VLEU230
VLEU234

site_idAE4
Number of Residues14
Detailsbinding site for residue HEM V 401
ChainResidue
VLEU41
VGLN44
VILE45
VGLY48
VLEU49
VARG80
VHIS83
VALA87
VPHE90
VGLY130
VHIS182
VPHE183
VPRO186
VTYR273

site_idAE5
Number of Residues17
Detailsbinding site for residue HEM V 402
ChainResidue
VTRP31
VGLY34
VSER35
VLEU37
VGLY38
VLEU94
VHIS97
VILE98
VSER106
VTYR109
VGLY116
VLEU119
VHIS196
VLEU197
VLEU200
VSER205
VASN206

site_idAE6
Number of Residues13
Detailsbinding site for residue PEE V 403
ChainResidue
NVAL49
NPHE53
NCDL101
VTRP30
VPHE95
VLEU96
VTYR103
VTYR104
VMET316
VTYR325
VTRP326
VLEU332
VLEU333

site_idAE7
Number of Residues9
Detailsbinding site for residue CDL Y 501
ChainResidue
QPLX101
TTRP24
VARG5
VHIS221
YPHE370
YTRP477
YLEU478
YARG479
YPEE502

site_idAE8
Number of Residues10
Detailsbinding site for residue PEE Y 502
ChainResidue
JCDL405
PALA126
QPLX101
TALA35
VLEU10
VILE14
VHIS221
YSER473
YPHE476
YCDL501

Functional Information from PROSITE/UniProt
site_idPS00143
Number of Residues24
DetailsINSULINASE Insulinase family, zinc-binding region signature. GsryedfsnlGtTHLLRLTsSlTT
ChainResidueDetails
KGLY68-THR91

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues178
DetailsTopological domain: {"description":"Mitochondrial matrix","evidences":[{"source":"PubMed","id":"28844695","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues288
DetailsTransmembrane: {"description":"Helical","evidences":[{"source":"PubMed","id":"28844695","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues714
DetailsTopological domain: {"description":"Mitochondrial intermembrane","evidences":[{"source":"PubMed","id":"28844695","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues4
DetailsModified residue: {"description":"Phosphoserine","evidences":[{"source":"PubMed","id":"23186163","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues2
DetailsModified residue: {"description":"N6-succinyllysine; alternate","evidences":[{"source":"UniProtKB","id":"Q9CQ69","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues170
DetailsDomain: {"description":"Rieske","evidences":[{"source":"PROSITE-ProRule","id":"PRU00628","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues10
DetailsBinding site: {"evidences":[{"source":"UniProtKB","id":"P13272","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues4
DetailsModified residue: {"description":"N6-acetyllysine","evidences":[{"source":"UniProtKB","id":"P99028","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI9
Number of Residues4
DetailsModified residue: {"description":"N6-succinyllysine; alternate","evidences":[{"source":"UniProtKB","id":"Q9D855","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI10
Number of Residues6
DetailsModified residue: {"description":"N6-acetyllysine","evidences":[{"source":"UniProtKB","id":"Q9D855","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI11
Number of Residues202
DetailsDomain: {"description":"Cytochrome c","evidences":[{"source":"PROSITE-ProRule","id":"PRU00433","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI12
Number of Residues4
DetailsBinding site: {"description":"covalent","evidences":[{"source":"UniProtKB","id":"P00125","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI13
Number of Residues2
DetailsBinding site: {"description":"axial binding residue","evidences":[{"source":"PubMed","id":"28844695","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"5XTE","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"5XTH","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI14
Number of Residues2
DetailsBinding site: {"description":"axial binding residue","evidences":[{"source":"PubMed","id":"28844695","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"5XTH","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI15
Number of Residues322
DetailsTransmembrane: {"description":"Helical","evidences":[{"source":"UniProtKB","id":"P00157","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI16
Number of Residues8
DetailsBinding site: {"description":"axial binding residue","evidences":[{"source":"UniProtKB","id":"P00157","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI17
Number of Residues2
DetailsBinding site: {"evidences":[{"source":"UniProtKB","id":"P00157","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI18
Number of Residues6
DetailsModified residue: {"description":"N6-acetyllysine","evidences":[{"source":"UniProtKB","id":"Q9DB77","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI19
Number of Residues2
DetailsModified residue: {"description":"N6-acetyllysine","evidences":[{"source":"PubMed","id":"19608861","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI20
Number of Residues4
DetailsModified residue: {"description":"N6-acetyllysine","evidences":[{"source":"UniProtKB","id":"Q9CZ13","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI21
Number of Residues2
DetailsModified residue: {"description":"N6-succinyllysine; alternate","evidences":[{"source":"UniProtKB","id":"Q9CZ13","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI22
Number of Residues2
DetailsModified residue: {"description":"Phosphoserine","evidences":[{"source":"UniProtKB","id":"Q68FY0","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

249697

PDB entries from 2026-02-25

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