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Yorodumi- PDB-5xte: Cryo-EM structure of human respiratory complex III (cytochrome bc... -
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Basic information
| Entry | Database: PDB / ID: 5xte | ||||||||||||||||||
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| Title | Cryo-EM structure of human respiratory complex III (cytochrome bc1 complex) | ||||||||||||||||||
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Keywords | OXIDOREDUCTASE/ELECTRON TRANSPORT / Respiratory / OXIDOREDUCTASE-ELECTRON TRANSPORT complex | ||||||||||||||||||
| Function / homology | Function and homology informationComplex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / response to D-galactosamine / Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly ...Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / response to D-galactosamine / Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / response to mercury ion / Respiratory electron transport / subthalamus development / pons development / response to cobalamin / cerebellar Purkinje cell layer development / mitochondrial respiratory chain complex III assembly / pyramidal neuron development / response to alkaloid / cellular respiration / thalamus development / Mitochondrial protein import / respiratory chain complex / respiratory chain complex III / oxidative phosphorylation / quinol-cytochrome-c reductase / response to glucagon / quinol-cytochrome-c reductase activity / response to copper ion / mitochondrial electron transport, ubiquinol to cytochrome c / hypothalamus development / midbrain development / electron transport coupled proton transport / response to hyperoxia / animal organ regeneration / response to cadmium ion / Mitochondrial protein degradation / aerobic respiration / response to activity / respiratory electron transport chain / generation of precursor metabolites and energy / hippocampus development / response to calcium ion / metalloendopeptidase activity / 2 iron, 2 sulfur cluster binding / response to toxic substance / response to ethanol / response to hypoxia / oxidoreductase activity / electron transfer activity / mitochondrial inner membrane / mitochondrial matrix / response to xenobiotic stimulus / heme binding / ubiquitin protein ligase binding / protein-containing complex binding / mitochondrion / proteolysis / nucleoplasm / metal ion binding / nucleus / membrane Similarity search - Function | ||||||||||||||||||
| Biological species | Homo sapiens (human) | ||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å | ||||||||||||||||||
Authors | Gu, J. / Wu, M. / Yang, M. | ||||||||||||||||||
| Funding support | China, 5items
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Citation | Journal: Cell / Year: 2017Title: Architecture of Human Mitochondrial Respiratory Megacomplex IIIIIV. Authors: Runyu Guo / Shuai Zong / Meng Wu / Jinke Gu / Maojun Yang / ![]() Abstract: The respiratory megacomplex represents the highest-order assembly of respiratory chain complexes, and it allows mitochondria to respond to energy-requiring conditions. To understand its architecture, ...The respiratory megacomplex represents the highest-order assembly of respiratory chain complexes, and it allows mitochondria to respond to energy-requiring conditions. To understand its architecture, we examined the human respiratory chain megacomplex-IIIIIV (MCIIIIIV) with 140 subunits and a subset of associated cofactors using cryo-electron microscopy. The MCIIIIIV forms a circular structure with the dimeric CIII located in the center, where it is surrounded by two copies each of CI and CIV. Two cytochrome c (Cyt.c) molecules are positioned to accept electrons on the surface of the c state CIII dimer. Analyses indicate that CII could insert into the gaps between CI and CIV to form a closed ring, which we termed the electron transport chain supercomplex. The structure not only reveals the precise assignment of individual subunits of human CI and CIII, but also enables future in-depth analysis of the electron transport chain as a whole. | ||||||||||||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 5xte.cif.gz | 852.3 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb5xte.ent.gz | 690.1 KB | Display | PDB format |
| PDBx/mmJSON format | 5xte.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 5xte_validation.pdf.gz | 2 MB | Display | wwPDB validaton report |
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| Full document | 5xte_full_validation.pdf.gz | 2.2 MB | Display | |
| Data in XML | 5xte_validation.xml.gz | 145.6 KB | Display | |
| Data in CIF | 5xte_validation.cif.gz | 199.5 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/xt/5xte ftp://data.pdbj.org/pub/pdb/validation_reports/xt/5xte | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 6774MC ![]() 6771C ![]() 6772C ![]() 6773C ![]() 6775C ![]() 6776C ![]() 5xtbC ![]() 5xtcC ![]() 5xtdC ![]() 5xthC ![]() 5xtiC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Assembly
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Components
-Cytochrome b-c1 complex subunit ... , 9 types, 18 molecules ANBOCPDQERFSGTKWLY
| #1: Protein | Mass: 9791.181 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O14949#2: Protein | Mass: 5893.814 Da / Num. of mol.: 2 / Fragment: UNP RESIDUES 1-57 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P47985, quinol-cytochrome-c reductase#3: Protein | Mass: 21645.578 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P47985, quinol-cytochrome-c reductase#4: Protein | Mass: 7189.299 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9UDW1#5: Protein | Mass: 8990.854 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P07919#6: Protein | Mass: 13037.842 Da / Num. of mol.: 2 / Fragment: UNP RESIDUES 6-111 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P14927#7: Protein | Mass: 5958.912 Da / Num. of mol.: 2 / Fragment: UNP RESIDUES 2-52 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O14957#10: Protein | Mass: 44946.582 Da / Num. of mol.: 2 / Fragment: UNP RESIDUES 35-453 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P22695#11: Protein | Mass: 49181.430 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P31930 |
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-Protein , 2 types, 4 molecules HUJV
| #8: Protein | Mass: 27388.395 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P08574#9: Protein | Mass: 42543.016 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P00156 |
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-Non-polymers , 6 types, 26 molecules 










| #12: Chemical | ChemComp-CDL / #13: Chemical | #14: Chemical | ChemComp-PEE / #15: Chemical | #16: Chemical | ChemComp-HEM / #17: Chemical | |
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-Details
| Has protein modification | Y |
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-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: Human respiratory complex III (cytochrome bc1 complex) Type: COMPLEX / Entity ID: #1-#11 / Source: NATURAL |
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| Source (natural) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.4 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER |
| Electron lens | Mode: BRIGHT FIELD |
| Image recording | Electron dose: 1.25 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k) |
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Processing
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| CTF correction | Type: NONE | ||||||||||||||||||||||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 167761 / Symmetry type: POINT |
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Homo sapiens (human)
China, 5items
Citation
UCSF Chimera




















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