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Open data
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Basic information
Entry | Database: PDB / ID: 7dkf | ||||||
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Title | Activity optimized supercomplex state4 | ||||||
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![]() | OXIDOREDUCTASE / respiratory / electron transport | ||||||
Function / homology | ![]() Complex I biogenesis / Mitochondrial protein import / TP53 Regulates Metabolic Genes / RHOG GTPase cycle / Cytoprotection by HMOX1 / respiratory chain complex IV assembly / mitochondrial respirasome assembly / respiratory chain complex IV / cellular response to oxygen levels / mitochondrial respiratory chain complex IV ...Complex I biogenesis / Mitochondrial protein import / TP53 Regulates Metabolic Genes / RHOG GTPase cycle / Cytoprotection by HMOX1 / respiratory chain complex IV assembly / mitochondrial respirasome assembly / respiratory chain complex IV / cellular response to oxygen levels / mitochondrial respiratory chain complex IV / mitochondrial large ribosomal subunit binding / regulation of oxidative phosphorylation / Respiratory electron transport / gliogenesis / mitochondrial respiratory chain complex III / neural precursor cell proliferation / cytochrome-c oxidase / mitochondrial respirasome / oxidative phosphorylation / [2Fe-2S] cluster assembly / oxygen sensor activity / quinol-cytochrome-c reductase / deoxynucleoside kinase activity / cellular respiration / ubiquinol-cytochrome-c reductase activity / ubiquinone-6 biosynthetic process / mitochondrial electron transport, cytochrome c to oxygen / Neutrophil degranulation / cytochrome-c oxidase activity / mitochondrial ribosome / mitochondrial electron transport, ubiquinol to cytochrome c / mitochondrial translation / Mitochondrial protein degradation / NADH:ubiquinone reductase (H+-translocating) / NADH dehydrogenase activity / apoptotic mitochondrial changes / mitochondrial ATP synthesis coupled electron transport / : / mitochondrial electron transport, NADH to ubiquinone / respirasome / mitochondrial respiratory chain complex I assembly / ubiquinone binding / acyl binding / NADH dehydrogenase (ubiquinone) activity / acyl carrier activity / quinone binding / electron transport coupled proton transport / ATP synthesis coupled electron transport / enzyme regulator activity / negative regulation of intrinsic apoptotic signaling pathway / ATP metabolic process / response to cAMP / aerobic respiration / respiratory electron transport chain / reactive oxygen species metabolic process / neurogenesis / regulation of mitochondrial membrane potential / central nervous system development / fatty acid binding / mitochondrial membrane / apoptotic signaling pathway / electron transport chain / regulation of protein phosphorylation / brain development / mitochondrial intermembrane space / negative regulation of cell growth / metalloendopeptidase activity / 2 iron, 2 sulfur cluster binding / fatty acid biosynthetic process / NAD binding / positive regulation of fibroblast proliferation / FMN binding / 4 iron, 4 sulfur cluster binding / response to oxidative stress / mitochondrial inner membrane / oxidoreductase activity / structural constituent of ribosome / mitochondrial matrix / copper ion binding / negative regulation of DNA-templated transcription / ubiquitin protein ligase binding / heme binding / protein-containing complex binding / mitochondrion / proteolysis / nucleoplasm / membrane / metal ion binding / plasma membrane / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 8.3 Å | ||||||
![]() | Jeon, T.J. / Lee, S.G. / Yoo, S.H. / Ryu, J.H. / Kim, D.S. / Hyun, J.K. / Kim, H.M. / Ryu, S.E. | ||||||
![]() | ![]() Title: A Dynamic Substrate Pool Revealed by cryo-EM of a Lipid-Preserved Respiratory Supercomplex. Authors: Tae Jin Jeon / Seong-Gyu Lee / Suk Hyun Yoo / Myeongbin Kim / Dabin Song / Joonghyun Ryu / Hwangseo Park / Deok-Soo Kim / Jaekyung Hyun / Ho Min Kim / Seong Eon Ryu / ![]() Abstract: Mitochondrial respiratory supercomplexes mediate redox electron transfer, generating a proton gradient for ATP synthesis. To provide structural information on the function of supercomplexes in ... Mitochondrial respiratory supercomplexes mediate redox electron transfer, generating a proton gradient for ATP synthesis. To provide structural information on the function of supercomplexes in physiologically relevant conditions, we conducted cryoelectron microscopy studies with supercomplexes in a lipid-preserving state. Here, we present cryoelectron microscopy structures of bovine respiratory supercomplex IIIIIV by using a lipid-preserving sample preparation. The preparation greatly enhances the intercomplex quinone transfer activity. The structures reveal large intercomplex motions that result in different shapes and sizes of the intercomplex space between complexes I and III, forming a dynamic substrate pool. Biochemical and structural analyses indicated that intercomplex phospholipids mediate the intercomplex motions. An analysis of the different classes of focus-refined complex I showed that structural switches due to quinone reduction led to the formation of a novel channel that could transfer reduced quinones to the intercomplex substrate pool. Our results indicate potential mechanism for the facilitated electron transfer involving a dynamic substrate pool and intercomplex movement by which supercomplexes play an active role in the regulation of metabolic flux and reactive oxygen species. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2.5 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 2.4 MB | Display | ![]() |
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Full document | ![]() | 3 MB | Display | |
Data in XML | ![]() | 406.7 KB | Display | |
Data in CIF | ![]() | 604.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 30706MC ![]() 7dgqC ![]() 7dgrC ![]() 7dgsC ![]() 7dgzC ![]() 7dh0C 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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Components
+Cytochrome b-c1 complex subunit ... , 9 types, 18 molecules A1M1B1N1E1Q1F1R1G1S1H1T1I1U1J1V1K1W1
+Protein , 4 types, 7 molecules C1O1D1P1A2W2M2
+NADH-ubiquinone oxidoreductase chain ... , 7 types, 7 molecules 22324252721262
+NADH dehydrogenase [ubiquinone] flavoprotein ... , 3 types, 3 molecules 8292F2
+NADH dehydrogenase [ubiquinone] iron-sulfur protein ... , 7 types, 7 molecules B2C2D2E2G2H2I2
+NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit ... , 12 types, 12 molecules J2K2L2N2O2P2Q2R2S2T2U2V2
+NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit ... , 11 types, 11 molecules X2Y2Z2a2b2c2d2f2h2g2e2
+NADH dehydrogenase [ubiquinone] 1 subunit ... , 2 types, 2 molecules i2j2
+Cytochrome c oxidase subunit ... , 13 types, 13 molecules A3B3C3D3E3F3G3H3I3J3K3L3M3
+Non-polymers , 13 types, 31 molecules ![](data/chem/img/HEM.gif)
![](data/chem/img/HEC.gif)
![](data/chem/img/FES.gif)
![](data/chem/img/3PE.gif)
![](data/chem/img/CDL.gif)
![](data/chem/img/FMN.gif)
![](data/chem/img/SF4.gif)
![](data/chem/img/ZN.gif)
![](data/chem/img/NAP.gif)
![](data/chem/img/PC1.gif)
![](data/chem/img/HEA.gif)
![](data/chem/img/CU.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/HEC.gif)
![](data/chem/img/FES.gif)
![](data/chem/img/3PE.gif)
![](data/chem/img/CDL.gif)
![](data/chem/img/FMN.gif)
![](data/chem/img/SF4.gif)
![](data/chem/img/ZN.gif)
![](data/chem/img/NAP.gif)
![](data/chem/img/PC1.gif)
![](data/chem/img/HEA.gif)
![](data/chem/img/CU.gif)
![](data/chem/img/MG.gif)
+Details
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: TISSUE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: supercomplex of electron transport chain complexes / Type: COMPLEX / Entity ID: #1-#68 / Source: NATURAL |
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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: 95 % / 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 |
Image recording | Electron dose: 35 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k) |
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Processing
EM software |
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CTF correction | Type: NONE | ||||||||||||||||||||
3D reconstruction | Resolution: 8.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 11651 / Symmetry type: POINT |