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Open data
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Basic information
| Entry | Database: PDB / ID: 7o71 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Title | Cryo-EM structure of a respiratory complex I | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Keywords | OXIDOREDUCTASE / Complex I / NADH dehydrogenase / Mitochondrion proton pumping / Ubiquinone | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Function / homology | Function and homology informationlipoate biosynthetic process / NADH dehydrogenase / membrane protein complex / NADH dehydrogenase complex / mitochondrial [2Fe-2S] assembly complex / oxidoreductase activity, acting on NAD(P)H / NADH dehydrogenase activity / iron-sulfur cluster assembly / ubiquinone binding / acyl binding ...lipoate biosynthetic process / NADH dehydrogenase / membrane protein complex / NADH dehydrogenase complex / mitochondrial [2Fe-2S] assembly complex / oxidoreductase activity, acting on NAD(P)H / NADH dehydrogenase activity / iron-sulfur cluster assembly / ubiquinone binding / acyl binding / electron transport coupled proton transport / acyl carrier activity / NADH:ubiquinone reductase (H+-translocating) / mitochondrial respiratory chain complex I assembly / mitochondrial electron transport, NADH to ubiquinone / respiratory chain complex I / NADH dehydrogenase (ubiquinone) activity / catalytic complex / quinone binding / ATP synthesis coupled electron transport / aerobic respiration / respiratory electron transport chain / electron transport chain / mitochondrial membrane / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / NAD binding / FMN binding / 4 iron, 4 sulfur cluster binding / response to oxidative stress / oxidoreductase activity / mitochondrial inner membrane / protein-containing complex binding / mitochondrion / metal ion binding / membrane Similarity search - Function | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Biological species | Yarrowia lipolytica (yeast) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.4 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Authors | Parey, K. / Vonck, J. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Funding support | Germany, 1items
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Citation | Journal: Sci Adv / Year: 2021Title: High-resolution structure and dynamics of mitochondrial complex I-Insights into the proton pumping mechanism. Authors: Kristian Parey / Jonathan Lasham / Deryck J Mills / Amina Djurabekova / Outi Haapanen / Etienne Galemou Yoga / Hao Xie / Werner Kühlbrandt / Vivek Sharma / Janet Vonck / Volker Zickermann / ![]() Abstract: Mitochondrial NADH:ubiquinone oxidoreductase (complex I) is a 1-MDa membrane protein complex with a central role in energy metabolism. Redox-driven proton translocation by complex I contributes ...Mitochondrial NADH:ubiquinone oxidoreductase (complex I) is a 1-MDa membrane protein complex with a central role in energy metabolism. Redox-driven proton translocation by complex I contributes substantially to the proton motive force that drives ATP synthase. Several structures of complex I from bacteria and mitochondria have been determined, but its catalytic mechanism has remained controversial. We here present the cryo-EM structure of complex I from at 2.1-Å resolution, which reveals the positions of more than 1600 protein-bound water molecules, of which ~100 are located in putative proton translocation pathways. Another structure of the same complex under steady-state activity conditions at 3.4-Å resolution indicates conformational transitions that we associate with proton injection into the central hydrophilic axis. By combining high-resolution structural data with site-directed mutagenesis and large-scale molecular dynamic simulations, we define details of the proton translocation pathways and offer insights into the redox-coupled proton pumping mechanism of complex I. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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 | 7o71.cif.gz | 1.5 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb7o71.ent.gz | 1.2 MB | Display | PDB format |
| PDBx/mmJSON format | 7o71.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/o7/7o71 ftp://data.pdbj.org/pub/pdb/validation_reports/o7/7o71 | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 12742MC ![]() 7o6yC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-NADH-ubiquinone oxidoreductase ... , 8 types, 8 molecules AL13456E
| #1: Protein | Mass: 79088.078 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast) / References: UniProt: Q9UUU3, NADH dehydrogenase |
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| #8: Protein | Mass: 9843.860 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast)References: UniProt: S5U4U1, NADH:ubiquinone reductase (H+-translocating) |
| #11: Protein | Mass: 38389.277 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast)References: UniProt: S5U3V2, NADH:ubiquinone reductase (H+-translocating) |
| #13: Protein | Mass: 14506.339 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast)References: UniProt: S5TMS4, NADH:ubiquinone reductase (H+-translocating) |
| #14: Protein | Mass: 54534.652 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast)References: UniProt: S5TMP9, NADH:ubiquinone reductase (H+-translocating) |
| #15: Protein | Mass: 73768.703 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast)References: UniProt: S5TF58, NADH:ubiquinone reductase (H+-translocating) |
| #16: Protein | Mass: 20793.111 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast)References: UniProt: S5U3X7, NADH:ubiquinone reductase (H+-translocating) |
| #19: Protein | Mass: 42765.738 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast) / References: UniProt: A0A371BY45 |
-NADH dehydrogenase ... , 2 types, 2 molecules B2
| #2: Protein | Mass: 53829.508 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast)References: UniProt: Q9UUU2, NADH:ubiquinone reductase (H+-translocating) |
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| #12: Protein | Mass: 53381.367 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast)References: UniProt: S5U4R9, NADH:ubiquinone reductase (H+-translocating) |
+Protein , 30 types, 30 molecules CGHIKSjgDFJMPRUWXYZabcdefhin89
-Acyl carrier protein ... , 2 types, 2 molecules OQ
| #23: Protein | Mass: 12053.585 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast) / References: UniProt: A0A1H6PXT9 |
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| #25: Protein | Mass: 14444.458 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Yarrowia lipolytica (yeast) / References: UniProt: A0A1D8NG21 |
-Non-polymers , 13 types, 1665 molecules 
























| #43: Chemical | ChemComp-SF4 / #44: Chemical | #45: Chemical | ChemComp-FMN / | #46: Chemical | ChemComp-PLC / #47: Chemical | ChemComp-3PE / #48: Chemical | #49: Chemical | #50: Chemical | ChemComp-CPL / | #51: Chemical | ChemComp-CDL / #52: Chemical | ChemComp-NDP / | #53: Chemical | ChemComp-ZN / | #54: Chemical | #55: 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: Mitochondrial NADH:ubiquinone oxidoreductase / Type: COMPLEX / Entity ID: #1-#42 / Source: NATURAL | |||||||||||||||||||||||||
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| Molecular weight | Value: 1 MDa / Experimental value: NO | |||||||||||||||||||||||||
| Source (natural) | Organism: Yarrowia lipolytica (yeast) / Strain: GB30 | |||||||||||||||||||||||||
| Buffer solution | pH: 7.2 | |||||||||||||||||||||||||
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| Specimen | Conc.: 1.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | |||||||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 80 % / Chamber temperature: 283 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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 165000 X / Calibrated magnification: 96899 X / Nominal defocus max: -2200 nm / Nominal defocus min: -800 nm / Cs: 2.7 mm / Alignment procedure: COMA FREE |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Average exposure time: 3 sec. / Electron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 (6k x 4k) / Num. of real images: 21770 |
| EM imaging optics | Energyfilter name: GIF Bioquantum / Energyfilter slit width: 30 eV |
| Image scans | Movie frames/image: 40 |
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 1078960 | ||||||||||||||||||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 2.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 178960 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||
| Atomic model building | B value: 30 / Protocol: OTHER / Space: REAL | ||||||||||||||||||||||||||||||||||||
| Atomic model building | PDB-ID: 6RFR Accession code: 6RFR / Source name: PDB / Type: experimental model |
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About Yorodumi




Yarrowia lipolytica (yeast)
Germany, 1items
Citation
UCSF Chimera












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