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Yorodumi- PDB-9ihq: Closed state with NUQM and without flavoprotein (classification s... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 9ihq | ||||||
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| Title | Closed state with NUQM and without flavoprotein (classification state 2) of Pichia pastoris mitochondrial complex I in cMSP26 nanodiscs | ||||||
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Keywords | MEMBRANE PROTEIN / NADH:ubiquinone oxidoreductase nanodisc membrane protein complex | ||||||
| Function / homology | Function and homology informationcarbon-nitrogen ligase activity, with glutamine as amido-N-donor / NADH:ubiquinone reductase (H+-translocating) / NADH dehydrogenase complex / oxidoreductase activity, acting on NAD(P)H / NADH dehydrogenase activity / acyl binding / ubiquinone binding / electron transport coupled proton transport / acyl carrier activity / NADH:ubiquinone reductase (H+-translocating) ...carbon-nitrogen ligase activity, with glutamine as amido-N-donor / NADH:ubiquinone reductase (H+-translocating) / NADH dehydrogenase complex / oxidoreductase activity, acting on NAD(P)H / NADH dehydrogenase activity / acyl binding / ubiquinone 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 / quinone binding / ATP synthesis coupled electron transport / aerobic respiration / respiratory electron transport chain / electron transport chain / mitochondrial membrane / mitochondrial intermembrane space / NAD 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 | Komagataella pastoris (fungus) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å | ||||||
Authors | Grba, D.N. / Hirst, J. | ||||||
| Funding support | United Kingdom, 1items
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Citation | Journal: Sci Adv / Year: 2025Title: Global conformations of complex I are distinguished by the binding of a unique interdomain bridging subunit. Authors: Chris Seunggyu Lee / Daniel N Grba / John J Wright / Bozhidar S Ivanov / Judy Hirst / ![]() Abstract: Complex I (CI; NADH ubiquinone oxidoreductase) is central to energy generation and metabolic homeostasis in mammalian cells but contributes to adverse outcome pathways under challenging conditions. ...Complex I (CI; NADH ubiquinone oxidoreductase) is central to energy generation and metabolic homeostasis in mammalian cells but contributes to adverse outcome pathways under challenging conditions. During ischemia, mammalian CI transitions from a turnover-ready, structurally "closed" state toward a dormant "open" state that prevents it from functioning in reverse during reperfusion to produce reactive oxygen species. Unfortunately, simpler, genetically tractable CI models do not recapitulate the same regulatory behavior, compromising mechanistic studies. Here, we report the structure of isolated CI from the yeast (-CI) and identify distinct closed and open states that resemble those of mammalian CI. Notably, a hitherto-unknown protein (NUQM) completes an interdomain bridge in only the closed state, implying that NUQM stabilizes it by restricting the conformational changes of opening. The direct correlation of NUQM binding with closed/open status in -CI provides opportunities for investigating regulatory mechanisms relevant to reversible catalysis and ischemia-reperfusion injury. | ||||||
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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 | 9ihq.cif.gz | 1.9 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9ihq.ent.gz | 1.3 MB | Display | PDB format |
| PDBx/mmJSON format | 9ihq.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 9ihq_validation.pdf.gz | 4 MB | Display | wwPDB validaton report |
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| Full document | 9ihq_full_validation.pdf.gz | 4.2 MB | Display | |
| Data in XML | 9ihq_validation.xml.gz | 233 KB | Display | |
| Data in CIF | 9ihq_validation.cif.gz | 338 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ih/9ihq ftp://data.pdbj.org/pub/pdb/validation_reports/ih/9ihq | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 52877MC ![]() 9ihoC ![]() 9ihpC ![]() 9ihrC 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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Components
+Protein , 28 types, 28 molecules 1BCDGIKOPRSVWXYbcdefghijklmp
-NADH-ubiquinone oxidoreductase chain ... , 6 types, 6 molecules AHJLMN
| #2: Protein | Mass: 16019.821 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus)References: UniProt: E1UWC4, NADH:ubiquinone reductase (H+-translocating) |
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| #7: Protein | Mass: 39698.844 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus)References: UniProt: E1UWC2, NADH:ubiquinone reductase (H+-translocating) |
| #9: Protein | Mass: 18564.352 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus)References: UniProt: E1UWC7, NADH:ubiquinone reductase (H+-translocating) |
| #11: Protein | Mass: 72436.070 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus)References: UniProt: E1UWC6, NADH:ubiquinone reductase (H+-translocating) |
| #12: Protein | Mass: 54784.211 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus)References: UniProt: E1UWC5, NADH:ubiquinone reductase (H+-translocating) |
| #13: Protein | Mass: 59097.926 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus)References: UniProt: E1UWC3, NADH:ubiquinone reductase (H+-translocating) |
-NADH dehydrogenase [ubiquinone] ... , 6 types, 6 molecules QZanoq
| #16: Protein | Mass: 18241.705 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: E1UWC0 |
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| #25: Protein | Mass: 17243.695 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: E1UWD8 |
| #26: Protein | Mass: 17446.691 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: E1UWD0 |
| #39: Protein | Mass: 12845.718 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: E1UWD2 |
| #40: Protein | Mass: 10473.039 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: E1UWD9 |
| #42: Protein | Mass: 16331.366 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: E1UWE0 |
-Acyl carrier ... , 2 types, 2 molecules TU
| #19: Protein | Mass: 15507.594 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: E1UWE2 |
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| #20: Protein | Mass: 14780.592 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: E1UWE3 |
-Non-polymers , 9 types, 58 molecules 
















| #43: Chemical | ChemComp-PLC / #44: Chemical | ChemComp-SF4 / #45: Chemical | ChemComp-FES / | #46: Chemical | ChemComp-K / | #47: Chemical | ChemComp-3PE / #48: Chemical | ChemComp-CDL / #49: Chemical | ChemComp-NDP / | #50: Chemical | ChemComp-ZN / | #51: Chemical | |
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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: Pichia Pastoris (Komagataella phaffi) mitochondrial complex I (NADH:ubiquinone oxidoreductase) Type: COMPLEX / Entity ID: #1-#42 / Source: NATURAL | |||||||||||||||
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| Molecular weight | Value: 0.850 MDa / Experimental value: YES | |||||||||||||||
| Source (natural) | Organism: Komagataella pastoris (fungus) | |||||||||||||||
| Buffer solution | pH: 7.5 Details: 10 mM MOPS, 50 mM KCl, pH 7.5 at 4 degrees celsius. | |||||||||||||||
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| Specimen | Conc.: 0.7 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: LMNG-solubilised Pichia Pastoris CI reconstituted in to nanodiscs (8:1:1 ratio of DOPC:DOPE:CDL [0.5 mg total] and 20 nM final Q10) | |||||||||||||||
| Specimen support | Details: glow discharged for 2X 90s, flipping the grid in between Grid material: COPPER / Grid type: Quantifoil R1.2/1.3 | |||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K / Details: 2s blot time and -10 blot force |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: TFS KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 130000 X / Nominal defocus max: 1800 nm / Nominal defocus min: 600 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Average exposure time: 5.85 sec. / Electron dose: 47.79 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 7574 |
| EM imaging optics | Energyfilter name: TFS Selectris X / Energyfilter slit width: 10 eV |
| Image scans | Width: 4096 / Height: 4096 |
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Processing
| EM software | Name: PHENIX / Version: 1.21_5207 / Category: model refinement | ||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING ONLY | ||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 1350752 | ||||||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 61256 / Symmetry type: POINT | ||||||||||||||||||||||||
| Atomic model building | Space: REAL Details: The initial model was made for state 1 and then subunits removed to match this state. This was manually inspected in Coot and final refinements with ligand restraints imposed performed in PHENIX v.1.21_5207 | ||||||||||||||||||||||||
| Atomic model building | PDB-ID: 9IHR Accession code: 9IHR / Details: State 1 from same data / Source name: PDB / Type: experimental model | ||||||||||||||||||||||||
| Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
| Displacement parameters | Biso mean: 37.19 Å2 | ||||||||||||||||||||||||
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About Yorodumi



Komagataella pastoris (fungus)
United Kingdom, 1items
Citation










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