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Open data
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Basic information
| Entry | Database: PDB / ID: 7dgr | ||||||||||||||||||
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| Title | Activity optimized supercomplex state2 | ||||||||||||||||||
Components |
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Keywords | OXIDOREDUCTASE / Complex I / respiratory / electron transport | ||||||||||||||||||
| Function / homology | Function and homology informationComplex III assembly / Complex I biogenesis / Complex IV assembly / TP53 Regulates Metabolic Genes / Mitochondrial protein import / RHOG GTPase cycle / respiratory chain complex IV assembly / subthalamus development / pons development / Cytoprotection by HMOX1 ...Complex III assembly / Complex I biogenesis / Complex IV assembly / TP53 Regulates Metabolic Genes / Mitochondrial protein import / RHOG GTPase cycle / respiratory chain complex IV assembly / subthalamus development / pons development / Cytoprotection by HMOX1 / mitochondrial respirasome assembly / cerebellar Purkinje cell layer development / mitochondrial processing peptidase complex / thalamus development / Respiratory electron transport / pyramidal neuron development / respiratory chain complex IV / mitochondrial ATP synthesis coupled electron transport / cellular response to oxygen levels / respiratory chain complex / mitochondrial large ribosomal subunit binding / ubiquinone biosynthetic process / neural precursor cell proliferation / gliogenesis / Mitochondrial translation termination / cytochrome-c oxidase / respiratory chain complex III / mitochondrial electron transport, cytochrome c to oxygen / quinol-cytochrome-c reductase / oxidative phosphorylation / Neutrophil degranulation / [2Fe-2S] cluster assembly / oxygen sensor activity / quinol-cytochrome-c reductase activity / midbrain development / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / Mitochondrial protein degradation / NADH:ubiquinone reductase (H+-translocating) / ubiquinone binding / mitochondrial electron transport, NADH to ubiquinone / hypothalamus development / electron transport coupled proton transport / acyl binding / NADH dehydrogenase activity / mitochondrial respiratory chain complex I assembly / reactive oxygen species metabolic process / respiratory chain complex I / NADH dehydrogenase (ubiquinone) activity / response to cAMP / quinone binding / neurogenesis / ATP synthesis coupled electron transport / enzyme regulator activity / fatty acid binding / hippocampus development / iron-sulfur cluster binding / aerobic respiration / central nervous system development / respiratory electron transport chain / brain development / 2 iron, 2 sulfur cluster binding / circadian rhythm / metalloendopeptidase activity / electron transport chain / mitochondrial intermembrane space / fatty acid biosynthetic process / NAD binding / mitochondrial membrane / FMN binding / 4 iron, 4 sulfur cluster binding / oxidoreductase activity / protein-macromolecule adaptor activity / mitochondrial inner membrane / mitochondrial matrix / copper ion binding / negative regulation of DNA-templated transcription / heme binding / protein-containing complex binding / mitochondrion / proteolysis / metal ion binding / nucleoplasm / membrane / nucleus / cytoplasm Similarity search - Function | ||||||||||||||||||
| Biological species | ![]() | ||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.6 Å | ||||||||||||||||||
Authors | Jeon, T.J. / Lee, S.G. / Yoo, S.H. / Ryu, J.H. / Kim, D.S. / Hyun, J.K. / Kim, H.M. / Ryu, S.E. | ||||||||||||||||||
Citation | Journal: Antioxid Redox Signal / Year: 2022Title: 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. | ||||||||||||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7dgr.cif.gz | 2.5 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb7dgr.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 7dgr.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/dg/7dgr ftp://data.pdbj.org/pub/pdb/validation_reports/dg/7dgr | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 30674MC ![]() 7dgqC ![]() 7dgsC ![]() 7dgzC ![]() 7dh0C ![]() 7dkfC M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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| 1 |
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Components
+NADH dehydrogenase [ubiquinone] flavoprotein ... , 3 types, 3 molecules 98F
+NADH-ubiquinone oxidoreductase chain ... , 7 types, 7 molecules 4276531
+Protein , 4 types, 7 molecules AWMmyoz
+NADH dehydrogenase [ubiquinone] iron-sulfur protein ... , 7 types, 7 molecules BCDEGHI
+NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit ... , 12 types, 12 molecules JKLNOPQRSTUV
+NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit ... , 11 types, 11 molecules XYZabcdfhge
+NADH dehydrogenase [ubiquinone] 1 subunit ... , 2 types, 2 molecules ij
+Cytochrome b-c1 complex subunit ... , 9 types, 18 molecules kwlxpA0qA1rA2sB3tA3uB2vB1
+Cytochrome c oxidase subunit ... , 13 types, 13 molecules A9C4C2A7C0A6A4A5B4C3B0C1A8
+Non-polymers , 13 types, 37 molecules 
























+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: NADH-UBIQUINONE OXIDOREDUCTASE / 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 | 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: FLOOD BEAM |
| 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
| CTF correction | Type: NONE |
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| Symmetry | Point symmetry: C1 (asymmetric) |
| 3D reconstruction | Resolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 57806 / Symmetry type: POINT |
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FIELD EMISSION GUN