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Open data
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Basic information
Entry | Database: PDB / ID: 6y79 | ||||||
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Title | Cryo-EM structure of a respiratory complex I F89A mutant | ||||||
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![]() | OXIDOREDUCTASE / Complex I / NADH dehydrogenase / Mitochondrion proton pumping / Ubiquinone | ||||||
Function / homology | ![]() lipoate biosynthetic process / NADH dehydrogenase / : / TIM23 mitochondrial import inner membrane translocase complex / protein import into mitochondrial matrix / NADH dehydrogenase complex / ubiquinone biosynthetic process / mitochondrial [2Fe-2S] assembly complex / oxidoreductase activity, acting on NAD(P)H / iron-sulfur cluster assembly ...lipoate biosynthetic process / NADH dehydrogenase / : / TIM23 mitochondrial import inner membrane translocase complex / protein import into mitochondrial matrix / NADH dehydrogenase complex / ubiquinone biosynthetic process / mitochondrial [2Fe-2S] assembly complex / oxidoreductase activity, acting on NAD(P)H / iron-sulfur cluster assembly / acyl binding / ubiquinone binding / acyl carrier activity / electron transport coupled proton transport / NADH:ubiquinone reductase (H+-translocating) / NADH dehydrogenase activity / mitochondrial electron transport, NADH to ubiquinone / mitochondrial respiratory chain complex I assembly / respiratory chain complex I / NADH dehydrogenase (ubiquinone) activity / 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 / membrane / metal ion binding Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.96 Å | ||||||
![]() | Parey, K. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Essential role of accessory subunit LYRM6 in the mechanism of mitochondrial complex I. Authors: Etienne Galemou Yoga / Kristian Parey / Amina Djurabekova / Outi Haapanen / Karin Siegmund / Klaus Zwicker / Vivek Sharma / Volker Zickermann / Heike Angerer / ![]() ![]() Abstract: Respiratory complex I catalyzes electron transfer from NADH to ubiquinone (Q) coupled to vectorial proton translocation across the inner mitochondrial membrane. Despite recent progress in structure ...Respiratory complex I catalyzes electron transfer from NADH to ubiquinone (Q) coupled to vectorial proton translocation across the inner mitochondrial membrane. Despite recent progress in structure determination of this very large membrane protein complex, the coupling mechanism is a matter of ongoing debate and the function of accessory subunits surrounding the canonical core subunits is essentially unknown. Concerted rearrangements within a cluster of conserved loops of central subunits NDUFS2 (β1-β2 loop), ND1 (TMH5-6 loop) and ND3 (TMH1-2 loop) were suggested to be critical for its proton pumping mechanism. Here, we show that stabilization of the TMH1-2 loop by accessory subunit LYRM6 (NDUFA6) is pivotal for energy conversion by mitochondrial complex I. We determined the high-resolution structure of inactive mutant F89A of eukaryotic complex I from the yeast Yarrowia lipolytica and found long-range structural changes affecting the entire loop cluster. In atomistic molecular dynamics simulations of the mutant, we observed conformational transitions in the loop cluster that disrupted a putative pathway for delivery of substrate protons required in Q redox chemistry. Our results elucidate in detail the essential role of accessory subunit LYRM6 for the function of eukaryotic complex I and offer clues on its redox-linked proton pumping mechanism. | ||||||
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 1.4 MB | Display | ![]() |
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PDB format | ![]() | 1.2 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 3 MB | Display | ![]() |
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Full document | ![]() | 3.2 MB | Display | |
Data in XML | ![]() | 216 KB | Display | |
Data in CIF | ![]() | 320.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 10711MC 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
+Protein , 40 types, 40 molecules ABCDEFGHIJKLMPRSUWXYZabcdefghi...
-Acyl carrier protein ... , 2 types, 2 molecules OQ
#14: Protein | Mass: 12053.585 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#16: Protein | Mass: 14444.458 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Non-polymers , 13 types, 44 molecules 
























#43: Chemical | ChemComp-SF4 / #44: Chemical | #45: Chemical | ChemComp-FMN / | #46: Chemical | ChemComp-NDP / | #47: Chemical | ChemComp-3PE / #48: Chemical | #49: Chemical | ChemComp-ZN / | #50: Chemical | #51: Chemical | ChemComp-PLC / #52: Chemical | ChemComp-CDL / #53: Chemical | ChemComp-UQ9 / | #54: Chemical | ChemComp-T7X / #55: Chemical | ChemComp-PSC / ( | |
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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: ![]() | |||||||||||||||||||||||||
Buffer solution | pH: 7.2 | |||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 1.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | |||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid type: C-flat-1.2/1.3 | |||||||||||||||||||||||||
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: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: -2500 nm / Nominal defocus min: -1500 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: 51.8 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 (6k x 4k) / Num. of real images: 2016 |
EM imaging optics | Energyfilter name: GIF Bioquantum / Energyfilter slit width: 30 eV |
Image scans | Movie frames/image: 40 |
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Processing
Software | Name: PHENIX / Version: 1.14_3260: / Classification: refinement | ||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 479372 | ||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 2.96 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 143203 / Num. of class averages: 1 / 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 | ||||||||||||||||||||||||||||||||||||
Refinement | Highest resolution: 2.96 Å | ||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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