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- PDB-7r43: Bovine complex I in the presence of IM1761092, active class iii (... -
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Basic information
Entry | Database: PDB / ID: 7r43 | |||||||||
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Title | Bovine complex I in the presence of IM1761092, active class iii (Composite map) | |||||||||
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![]() | OXIDOREDUCTASE / Complex I | |||||||||
Function / homology | ![]() 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 / mitochondrial ATP synthesis coupled electron transport / Mitochondrial protein degradation / 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 / response to cAMP / reactive oxygen species metabolic process / aerobic respiration / fatty acid binding / respiratory electron transport chain / neurogenesis / electron transport chain / mitochondrial membrane / brain development / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / circadian rhythm / NAD binding / fatty acid biosynthetic process / FMN binding / 4 iron, 4 sulfur cluster binding / response to oxidative stress / 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 | ![]() ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.4 Å | |||||||||
![]() | Bridges, H.R. / Blaza, J.N. / Yin, Z. / Chung, I. / Hirst, J. | |||||||||
Funding support | ![]()
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![]() | ![]() 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 viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 1.5 MB | Display | ![]() |
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PDB format | ![]() | 1.2 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 2.6 MB | Display | ![]() |
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Full document | ![]() | 2.7 MB | Display | |
Data in XML | ![]() | 204.1 KB | Display | |
Data in CIF | ![]() | 309.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 14261MC ![]() 7qsdC ![]() 7r41C ![]() 7r42C ![]() 7r44C ![]() 7r45C ![]() 7r46C ![]() 7r47C ![]() 7r48C ![]() 7r4cC ![]() 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 ![]() |
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Links
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Assembly
Deposited unit | ![]()
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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) ![]() ![]() 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) ![]() ![]() |
#10: Protein | Mass: 19110.488 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() 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) ![]() ![]() 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) ![]() ![]() 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) ![]() ![]() References: UniProt: P03910, NADH:ubiquinone reductase (H+-translocating) |
#14: Protein | Mass: 39302.941 Da / Num. of mol.: 1 / Mutation: N278K / Source method: isolated from a natural source / Source: (natural) ![]() ![]() 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) ![]() ![]() 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) ![]() ![]() 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) ![]() ![]() 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) ![]() ![]() 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) ![]() ![]() |
#18: Protein | Mass: 13433.194 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#30: Protein | Mass: 12694.671 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-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) ![]() ![]() References: UniProt: P04394, NADH:ubiquinone reductase (H+-translocating), NADH dehydrogenase |
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#6: Protein | Mass: 50718.777 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() 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) ![]() ![]() |
-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) ![]() ![]() 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) ![]() ![]() |
-NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit ... , 12 types, 12 molecules OPSVWXYZabqr
#15: Protein | Mass: 39330.984 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#16: Protein | Mass: 42913.430 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#19: Protein | Mass: 11097.824 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#21: Protein | Mass: 13334.608 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#22: Protein | Mass: 15083.544 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#23: Protein | Mass: 20124.133 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#24: Protein | Mass: 14814.058 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#25: Protein | Mass: 16694.395 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#26: Protein | Mass: 8117.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#27: Protein | Mass: 9357.850 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#42: Protein | Mass: 17115.508 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#43: Protein | Mass: 12737.620 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-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) ![]() ![]() |
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#29: Protein | Mass: 14159.332 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-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) ![]() ![]() |
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#32: Protein | Mass: 17594.945 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#33: Protein | Mass: 21624.135 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#34: Protein | Mass: 15460.927 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#35: Protein | Mass: 12298.858 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#36: Protein | Mass: 11160.705 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#37: Protein | Mass: 21678.459 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#38: Protein | Mass: 15206.260 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#39: Protein | Mass: 21827.889 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#40: Protein | Mass: 16428.846 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#41: Protein | Mass: 21000.900 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Sugars , 1 types, 10 molecules 
#45: Sugar | ChemComp-LMT / |
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-Non-polymers , 14 types, 922 molecules 


























#46: Chemical | ChemComp-PC1 / #47: Chemical | ChemComp-SF4 / #48: Chemical | #49: Chemical | ChemComp-FMN / | #50: Chemical | ChemComp-K / | #51: Chemical | ChemComp-3PE / #52: Chemical | ChemComp-CDL / #53: Chemical | ChemComp-GTP / | #54: Chemical | ChemComp-MG / | #55: Chemical | ChemComp-NDP / | #56: Chemical | ChemComp-ZN / | #57: Chemical | #58: Chemical | ChemComp-MYR / | #59: Water | ChemComp-HOH / | |
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-Details
Has ligand of interest | N |
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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 |
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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: ![]() ![]() | ||||||||||||||||||||
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 |
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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 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) |
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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: 2.4 Å / Resolution method: OTHER / Num. of particles: 27326 / Details: D99 measure from PHENIX / Symmetry type: POINT |