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Yorodumi- PDB-7r4c: Bovine complex I in the presence of IM1761092, deactive class v (... -
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Basic information
| Entry | Database: PDB / ID: 7r4c | |||||||||
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| Title | Bovine complex I in the presence of IM1761092, deactive class v (Composite map) | |||||||||
|  Components | 
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|  Keywords | OXIDOREDUCTASE / Complex I | |||||||||
| Function / homology |  Function and homology information Complex I biogenesis / Mitochondrial protein import / RHOG GTPase cycle / ubiquinone biosynthetic process / Respiratory electron transport / cellular response to oxygen levels / mitochondrial large ribosomal subunit binding / gliogenesis / neural precursor cell proliferation / [2Fe-2S] cluster assembly ...Complex I biogenesis / Mitochondrial protein import / RHOG GTPase cycle / ubiquinone biosynthetic process / Respiratory electron transport / cellular response to oxygen levels / mitochondrial large ribosomal subunit binding / gliogenesis / neural precursor cell proliferation / [2Fe-2S] cluster assembly / oxygen sensor activity / Neutrophil degranulation / NADH dehydrogenase activity / Mitochondrial protein degradation / acyl binding / ubiquinone binding / electron transport coupled proton transport / mitochondrial ATP synthesis coupled electron 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 / response to cAMP / NADH dehydrogenase (ubiquinone) activity / quinone binding / ATP synthesis coupled electron transport / neurogenesis / reactive oxygen species metabolic process / aerobic respiration / fatty acid binding / respiratory electron transport chain / electron transport chain / circadian rhythm / brain development / mitochondrial membrane / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / NAD binding / fatty acid biosynthetic process / FMN binding / 4 iron, 4 sulfur cluster binding / oxidoreductase activity / mitochondrial inner membrane / mitochondrial matrix / negative regulation of DNA-templated transcription / apoptotic process / protein-containing complex binding / mitochondrion / nucleoplasm / metal ion binding / cytoplasm Similarity search - Function | |||||||||
| Biological species |   Bos taurus (domestic cattle) | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.3 Å | |||||||||
|  Authors | Bridges, H.R. / Blaza, J.N. / Yin, Z. / Chung, I. / Hirst, J. | |||||||||
| Funding support |  United Kingdom, 2items 
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|  Citation |  Journal: Science / Year: 2023 Title: Structural basis of mammalian respiratory complex I inhibition by medicinal biguanides. Authors: Hannah R Bridges / James N Blaza / Zhan Yin / Injae Chung / Michael N Pollak / Judy Hirst /    Abstract: The molecular mode of action of biguanides, including the drug metformin, which is widely used in the treatment of diabetes, is incompletely characterized. Here, we define the inhibitory drug-target ...The molecular mode of action of biguanides, including the drug metformin, which is widely used in the treatment of diabetes, is incompletely characterized. Here, we define the inhibitory drug-target interaction(s) of a model biguanide with mammalian respiratory complex I by combining cryo-electron microscopy and enzyme kinetics. We interpret these data to explain the selectivity of biguanide binding to different enzyme states. The primary inhibitory site is in an amphipathic region of the quinone-binding channel, and an additional binding site is in a pocket on the intermembrane-space side of the enzyme. An independent local chaotropic interaction, not previously described for any drug, displaces a portion of a key helix in the membrane domain. Our data provide a structural basis for biguanide action and enable the rational design of medicinal biguanides. | |||||||||
| History | 
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- Structure visualization
Structure visualization
| Structure viewer | Molecule:  Molmil  Jmol/JSmol | 
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- Download
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| PDBx/mmCIF format |  7r4c.cif.gz | 1.5 MB | Display |  PDBx/mmCIF format | 
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| PDB format |  pdb7r4c.ent.gz | 1.2 MB | Display |  PDB format | 
| PDBx/mmJSON format |  7r4c.json.gz | Tree view |  PDBx/mmJSON format | |
| Others |  Other downloads | 
-Validation report
| Summary document |  7r4c_validation.pdf.gz | 2.7 MB | Display |  wwPDB validaton report | 
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| Full document |  7r4c_full_validation.pdf.gz | 2.8 MB | Display | |
| Data in XML |  7r4c_validation.xml.gz | 199.9 KB | Display | |
| Data in CIF |  7r4c_validation.cif.gz | 310.7 KB | Display | |
| Arichive directory |  https://data.pdbj.org/pub/pdb/validation_reports/r4/7r4c  ftp://data.pdbj.org/pub/pdb/validation_reports/r4/7r4c | HTTPS FTP | 
-Related structure data
| Related structure data |  14292MC  7qsdC  7r41C  7r42C  7r43C  7r44C  7r45C  7r46C  7r47C  7r48C  7r4dC  7r4fC  7r4gC 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 | 
- Links
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- Assembly
Assembly
| Deposited unit |  
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| 1 | 
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- Components
Components
-NADH-ubiquinone oxidoreductase chain  ... , 7 types, 7 molecules AHJKLMN      
| #1: Protein | Mass: 13086.531 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: Q7JAS9, NADH:ubiquinone reductase (H+-translocating) | 
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| #8: Protein | Mass: 35716.785 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P03887 | 
| #10: Protein | Mass: 19110.488 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P03924, NADH:ubiquinone reductase (H+-translocating) | 
| #11: Protein | Mass: 10828.195 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P03902, NADH:ubiquinone reductase (H+-translocating) | 
| #12: Protein | Mass: 68355.930 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P03920, NADH:ubiquinone reductase (H+-translocating) | 
| #13: Protein | Mass: 52158.758 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P03910, NADH:ubiquinone reductase (H+-translocating) | 
| #14: Protein | Mass: 39302.941 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P03892, NADH:ubiquinone reductase (H+-translocating) | 
-NADH dehydrogenase [ubiquinone] iron-sulfur protein  ... , 7 types, 7 molecules BCDIQRe      
| #2: Protein | Mass: 23802.926 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P42026, NADH:ubiquinone reductase (H+-translocating) | 
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| #3: Protein | Mass: 30323.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P23709, NADH:ubiquinone reductase (H+-translocating) | 
| #4: Protein | Mass: 52678.547 Da / Num. of mol.: 1 / Mutation: Q166R / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P17694, NADH:ubiquinone reductase (H+-translocating) | 
| #9: Protein | Mass: 23926.400 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P42028, NADH:ubiquinone reductase (H+-translocating) | 
| #17: Protein | Mass: 19841.555 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02375 | 
| #18: Protein | Mass: 13433.194 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P23934 | 
| #30: Protein | Mass: 12694.671 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02379 | 
-NADH dehydrogenase [ubiquinone] flavoprotein  ... , 3 types, 3 molecules EFs  
| #5: Protein | Mass: 27341.496 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P04394, NADH:ubiquinone reductase (H+-translocating) | 
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| #6: Protein | Mass: 50718.777 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P25708, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase | 
| #44: Protein | Mass: 11874.492 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P25712 | 
-Protein , 2 types, 3 molecules GTU  
| #7: Protein | Mass: 79532.219 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart References: UniProt: P15690, NADH:ubiquinone reductase (H+-translocating) | 
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| #20: Protein | Mass: 17421.340 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P52505 | 
-NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit  ... , 12 types, 12 molecules OPSVWXYZabqr           
| #15: Protein | Mass: 39330.984 Da / Num. of mol.: 1 / Mutation: N278K / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P34942 | 
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| #16: Protein | Mass: 42913.430 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P34943 | 
| #19: Protein | Mass: 11097.824 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02370 | 
| #21: Protein | Mass: 13334.608 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P23935 | 
| #22: Protein | Mass: 15083.544 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02366 | 
| #23: Protein | Mass: 20124.133 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P42029 | 
| #24: Protein | Mass: 14814.058 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q8HXG6 | 
| #25: Protein | Mass: 16694.395 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q95KV7 | 
| #26: Protein | Mass: 8117.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02377 | 
| #27: Protein | Mass: 9357.850 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02371 | 
| #42: Protein | Mass: 17115.508 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: O97725 | 
| #43: Protein | Mass: 12737.620 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q05752 | 
-NADH dehydrogenase [ubiquinone] 1 subunit  ... , 2 types, 2 molecules cd 
| #28: Protein | Mass: 8796.211 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02376 | 
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| #29: Protein | Mass: 14159.332 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02827 | 
-NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit  ... , 11 types, 11 molecules fghijklmnop          
| #31: Protein | Mass: 6978.148 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02378 | 
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| #32: Protein | Mass: 17594.945 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q8HXG5 | 
| #33: Protein | Mass: 21624.135 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02380 | 
| #34: Protein | Mass: 15460.927 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02367 | 
| #35: Protein | Mass: 12298.858 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02374 | 
| #36: Protein | Mass: 11160.705 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02365 | 
| #37: Protein | Mass: 21678.459 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02372 | 
| #38: Protein | Mass: 15206.260 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: P48305 | 
| #39: Protein | Mass: 21827.889 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02369 | 
| #40: Protein | Mass: 16428.846 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02368 | 
| #41: Protein | Mass: 21000.900 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)    Bos taurus (domestic cattle) / Organ: Heart / References: UniProt: Q02373 | 
-Sugars , 1 types, 12 molecules 
| #45: Sugar | ChemComp-LMT / | 
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-Non-polymers , 15 types, 1564 molecules 




























| #46: Chemical | ChemComp-SF4 / #47: Chemical | #48: Chemical | #49: Chemical | ChemComp-FMN / | #50: Chemical | ChemComp-K / | #51: Chemical | ChemComp-3PE / #52: Chemical | #53: Chemical | ChemComp-CDL / #54: Chemical | ChemComp-GTP / | #55: Chemical | ChemComp-MG / | #56: Chemical | ChemComp-NDP / | #57: Chemical | ChemComp-ZN / | #58: Chemical | #59: Chemical | ChemComp-MYR / | #60: Water | ChemComp-HOH / |  | 
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-Details
| Has ligand of interest | Y | 
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-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY | 
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction | 
- Sample preparation
Sample preparation
| Component | Name: NADH Ubiquinone oxidoreductase (Complex I) / Type: COMPLEX / Entity ID: #1-#44 / Source: NATURAL | ||||||||||||||||||||
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| Molecular weight | Value: 1 MDa / Experimental value: YES | ||||||||||||||||||||
| Source (natural) | Organism:   Bos taurus (domestic cattle) / Organ: Heart | ||||||||||||||||||||
| Buffer solution | pH: 7.14 | ||||||||||||||||||||
| Buffer component | 
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| Specimen | Conc.: 3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||
| Specimen support | Details: Grid also covalently modified by peg-thiol for 48 hours in a nitrogen atmosphere. Grid type: UltrAuFoil R0.6/1 | ||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE | 
- Electron microscopy imaging
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 defocus max: 2400 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm | 
| Image recording | Electron dose: 40 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) | 
- Processing
Processing
| EM software | Name: RELION / Version: 3.1 / Category: particle selection | 
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | 
| 3D reconstruction | Resolution: 2.3 Å / Resolution method: OTHER / Num. of particles: 91673 / Details: D99 measure from Phenix / Symmetry type: POINT | 
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