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Open data
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Basic information
Entry | Database: PDB / ID: 9etz | ||||||||||||
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Title | III2IV respiratory supercomplex from Saccharomyces cerevisiae | ||||||||||||
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![]() | MEMBRANE PROTEIN / Respiration / supercomplex | ||||||||||||
Function / homology | ![]() Complex III assembly / : / matrix side of mitochondrial inner membrane / protein processing involved in protein targeting to mitochondrion / mitochondrial cytochrome c oxidase assembly / Respiratory electron transport / mitochondrial respirasome assembly / Mitochondrial protein degradation / mitochondrial respiratory chain complex III assembly / respiratory chain complex IV ...Complex III assembly / : / matrix side of mitochondrial inner membrane / protein processing involved in protein targeting to mitochondrion / mitochondrial cytochrome c oxidase assembly / Respiratory electron transport / mitochondrial respirasome assembly / Mitochondrial protein degradation / mitochondrial respiratory chain complex III assembly / respiratory chain complex IV / cellular respiration / respiratory chain complex / cytochrome-c oxidase / respiratory chain complex III / quinol-cytochrome-c reductase / mitochondrial electron transport, cytochrome c to oxygen / quinol-cytochrome-c reductase activity / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / mitochondrial crista / ubiquinone binding / ATP synthesis coupled electron transport / enzyme regulator activity / proton transmembrane transport / nuclear periphery / aerobic respiration / respiratory electron transport chain / mitochondrial membrane / metalloendopeptidase activity / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / mitochondrial inner membrane / oxidoreductase activity / copper ion binding / heme binding / mitochondrion / proteolysis / zinc ion binding / metal ion binding / membrane / cytosol Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.4 Å | ||||||||||||
![]() | Moe, A. / Brzezinski, P. | ||||||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Electron transfer in the respiratory chain at low salinity. Authors: Ana Paula Lobez / Fei Wu / Justin M Di Trani / John L Rubinstein / Mikael Oliveberg / Peter Brzezinski / Agnes Moe / ![]() ![]() ![]() Abstract: Recent studies have established that cellular electrostatic interactions are more influential than assumed previously. Here, we use cryo-EM and perform steady-state kinetic studies to investigate ...Recent studies have established that cellular electrostatic interactions are more influential than assumed previously. Here, we use cryo-EM and perform steady-state kinetic studies to investigate electrostatic interactions between cytochrome (cyt.) c and the complex (C) III-IV supercomplex from Saccharomyces cerevisiae at low salinity. The kinetic studies show a sharp transition with a Hill coefficient ≥2, which together with the cryo-EM data at 2.4 Å resolution indicate multiple cyt. c molecules bound along the supercomplex surface. Negatively charged loops of CIII subunits Qcr6 and Qcr9 become structured to interact with cyt. c. In addition, the higher resolution allows us to identify water molecules in proton pathways of CIV and, to the best of our knowledge, previously unresolved cardiolipin molecules. In conclusion, the lowered electrostatic screening renders engagement of multiple cyt. c molecules that are directed by electrostatically structured CIII loops to conduct electron transfer between CIII and CIV. | ||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 1.2 MB | Display | ![]() |
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PDB format | ![]() | 980.5 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 19963MC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
-Cytochrome b-c1 complex subunit ... , 8 types, 16 molecules ALBMEPFQGRHSITJU
#1: Protein | Mass: 47459.270 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #2: Protein | Mass: 38751.918 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #5: Protein | Mass: 20122.955 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #6: Protein | Mass: 8983.905 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #7: Protein | Mass: 14452.557 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #8: Protein | Mass: 10856.314 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #9: Protein | Mass: 6535.484 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #10: Protein | Mass: 8471.717 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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-Protein , 2 types, 4 molecules CNDO
#3: Protein | Mass: 43686.590 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #4: Protein | Mass: 27678.215 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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-Cytochrome c oxidase subunit ... , 12 types, 12 molecules abcdfghijkle
#11: Protein | Mass: 58832.586 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#12: Protein | Mass: 26779.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#13: Protein | Mass: 30383.582 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#14: Protein | Mass: 12947.680 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#15: Protein | Mass: 12056.452 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Gene: COX6, YHR051W / Production host: ![]() ![]() |
#16: Protein | Mass: 6811.154 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#17: Protein | Mass: 5737.735 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#18: Protein | Mass: 6471.684 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#19: Protein | Mass: 8909.022 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#20: Protein | Mass: 13116.012 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#21: Protein/peptide | Mass: 5088.929 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#22: Protein | Mass: 14891.784 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Non-polymers , 14 types, 71 molecules 


























#23: Chemical | ChemComp-CDL / #24: Chemical | ChemComp-HEM / #25: Chemical | ChemComp-PEF / #26: Chemical | ChemComp-PCF / #27: Chemical | #28: Chemical | #29: Chemical | #30: Chemical | ChemComp-CU / | #31: Chemical | #32: Chemical | ChemComp-CA / | #33: Chemical | ChemComp-MG / | #34: Chemical | ChemComp-CUA / | #35: Chemical | ChemComp-ZN / | #36: Water | ChemComp-HOH / | |
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-Details
Has ligand of interest | N |
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Has protein modification | Y |
-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: III2-IV respiratory supercomplex / Type: COMPLEX / Entity ID: #1-#22 / Source: NATURAL |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() ![]() |
Buffer solution | pH: 7.4 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
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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: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 600 nm |
Image recording | Electron dose: 40 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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3D reconstruction | Resolution: 2.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 196457 / Symmetry type: POINT | ||||||||||||||||||||||||
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