+Open data
-Basic information
Entry | Database: PDB / ID: 7zeb | ||||||
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Title | Complex I from Ovis aries at pH9, Closed state | ||||||
Components |
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Keywords | PROTON TRANSPORT / Complex I / respiration / NADH / proton pump / mitochondria / iron-sulphur cluster / oxidoreductase / membrane protein / Quinone | ||||||
Function / homology | Function and homology information oxidoreductase activity, acting on NAD(P)H / NADH:ubiquinone reductase (H+-translocating) / apoptotic mitochondrial changes / NADH dehydrogenase activity / : / mitochondrial respiratory chain complex I assembly / mitochondrial electron transport, NADH to ubiquinone / electron transport coupled proton transport / acyl binding / acyl carrier activity ...oxidoreductase activity, acting on NAD(P)H / NADH:ubiquinone reductase (H+-translocating) / apoptotic mitochondrial changes / NADH dehydrogenase activity / : / mitochondrial respiratory chain complex I assembly / mitochondrial electron transport, NADH to ubiquinone / electron transport coupled proton transport / acyl binding / acyl carrier activity / NADH dehydrogenase (ubiquinone) activity / ATP synthesis coupled electron transport / quinone binding / membrane => GO:0016020 / : / ATP metabolic process / respiratory electron transport chain / reactive oxygen species metabolic process / FAD binding / regulation of mitochondrial membrane potential / electron transport chain / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / circadian rhythm / NAD binding / FMN binding / 4 iron, 4 sulfur cluster binding / response to oxidative stress / mitochondrial inner membrane / oxidoreductase activity / mitochondrial matrix / protein-containing complex binding / nucleus / metal ion binding Similarity search - Function | ||||||
Biological species | Ovis aries (sheep) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å | ||||||
Authors | Sazanov, L. / Petrova, O. | ||||||
Funding support | European Union, 1items
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Citation | Journal: Nature / Year: 2022 Title: A universal coupling mechanism of respiratory complex I. Authors: Vladyslav Kravchuk / Olga Petrova / Domen Kampjut / Anna Wojciechowska-Bason / Zara Breese / Leonid Sazanov / Abstract: Complex I is the first enzyme in the respiratory chain, which is responsible for energy production in mitochondria and bacteria. Complex I couples the transfer of two electrons from NADH to quinone ...Complex I is the first enzyme in the respiratory chain, which is responsible for energy production in mitochondria and bacteria. Complex I couples the transfer of two electrons from NADH to quinone and the translocation of four protons across the membrane, but the coupling mechanism remains contentious. Here we present cryo-electron microscopy structures of Escherichia coli complex I (EcCI) in different redox states, including catalytic turnover. EcCI exists mostly in the open state, in which the quinone cavity is exposed to the cytosol, allowing access for water molecules, which enable quinone movements. Unlike the mammalian paralogues, EcCI can convert to the closed state only during turnover, showing that closed and open states are genuine turnover intermediates. The open-to-closed transition results in the tightly engulfed quinone cavity being connected to the central axis of the membrane arm, a source of substrate protons. Consistently, the proportion of the closed state increases with increasing pH. We propose a detailed but straightforward and robust mechanism comprising a 'domino effect' series of proton transfers and electrostatic interactions: the forward wave ('dominoes stacking') primes the pump, and the reverse wave ('dominoes falling') results in the ejection of all pumped protons from the distal subunit NuoL. This mechanism explains why protons exit exclusively from the NuoL subunit and is supported by our mutagenesis data. We contend that this is a universal coupling mechanism of complex I and related enzymes. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 7zeb.cif.gz | 1.6 MB | Display | PDBx/mmCIF format |
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PDB format | pdb7zeb.ent.gz | 1.3 MB | Display | PDB format |
PDBx/mmJSON format | 7zeb.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 7zeb_validation.pdf.gz | 1.6 MB | Display | wwPDB validaton report |
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Full document | 7zeb_full_validation.pdf.gz | 1.6 MB | Display | |
Data in XML | 7zeb_validation.xml.gz | 192.2 KB | Display | |
Data in CIF | 7zeb_validation.cif.gz | 302 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ze/7zeb ftp://data.pdbj.org/pub/pdb/validation_reports/ze/7zeb | HTTPS FTP |
-Related structure data
Related structure data | 14688MC 7p61C 7p62C 7p63C 7p64C 7p69C 7p7cC 7p7eC 7p7jC 7p7kC 7p7lC 7p7mC 7z7rC 7z7sC 7z7tC 7z7vC 7z80C 7z83C 7z84C 7zc5C 7zciC 7zd6C 7zdhC 7zdjC 7zdmC 7zdpC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
-NADH dehydrogenase [ubiquinone] iron-sulfur protein ... , 5 types, 5 molecules 4l6bc
#1: Protein | Mass: 49220.320 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A7M4DUF9 |
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#15: Protein | Mass: 12474.397 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A836D7R1 |
#34: Protein | Mass: 17168.219 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P7E4I4 |
#37: Protein | Mass: 10513.649 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P7EX23 |
#38: Protein | Mass: 14559.492 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5PE07 |
-NADH-ubiquinone oxidoreductase chain ... , 7 types, 7 molecules AHJKLMN
#2: Protein | Mass: 13106.520 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) References: UniProt: O78753, NADH:ubiquinone reductase (H+-translocating) |
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#3: Protein | Mass: 35884.902 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) References: UniProt: O78747, NADH:ubiquinone reductase (H+-translocating) |
#4: Protein | Mass: 19126.619 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) References: UniProt: O78757, NADH:ubiquinone reductase (H+-translocating) |
#5: Protein | Mass: 10868.237 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) References: UniProt: O78754, NADH:ubiquinone reductase (H+-translocating) |
#6: Protein | Mass: 68438.906 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) References: UniProt: O78756, NADH:ubiquinone reductase (H+-translocating) |
#7: Protein | Mass: 52086.742 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) References: UniProt: O78755, NADH:ubiquinone reductase (H+-translocating) |
#8: Protein | Mass: 39149.805 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) References: UniProt: O78748, NADH:ubiquinone reductase (H+-translocating) |
-Protein , 15 types, 16 molecules VWXjZmnotuwz359g
#9: Protein | Mass: 14652.813 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3E4K7 | ||||||||||||||||||||||||
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#10: Protein | Mass: 16317.004 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3E6Y9 | ||||||||||||||||||||||||
#11: Protein | Mass: 17608.199 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5NQT7 #13: Protein | | Mass: 20526.389 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3EI17 #16: Protein | | Mass: 8869.269 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5NYM7 #17: Protein | | Mass: 8958.202 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3E8V0 #18: Protein | | Mass: 14231.420 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5P9Q8 #23: Protein | | Mass: 21517.518 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5PGA3 #24: Protein | | Mass: 7898.769 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3EC72 #26: Protein | | Mass: 11998.386 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A836CQA7 #29: Protein | | Mass: 8211.519 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A7M4DUG2 #32: Protein | | Mass: 75520.484 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5QB34 #33: Protein | | Mass: 24381.525 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3EKX5 #35: Protein | | Mass: 24496.121 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3TFB2 #42: Protein | | Mass: 13767.958 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5QC06 |
-NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit ... , 7 types, 7 molecules Ykqefhi
#12: Protein | Mass: 20008.014 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3EAP5 |
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#14: Protein | Mass: 36883.742 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5QBF5 |
#20: Protein | Mass: 16276.852 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3E975 |
#40: Protein | Mass: 9841.279 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3E5Z9 |
#41: Protein | Mass: 13028.180 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5PNX7 |
#43: Protein | Mass: 12441.238 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5P0I2 |
#44: Protein | Mass: 17115.508 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3CXE3 |
-NADH:ubiquinone oxidoreductase subunit ... , 2 types, 2 molecules pd
#19: Protein | Mass: 14975.999 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5QF73 |
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#39: Protein | Mass: 38860.719 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5PI58 |
-NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit ... , 3 types, 3 molecules rsv
#21: Protein | Mass: 15296.768 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: D6QZ20 |
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#22: Protein | Mass: 14963.081 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5P5V3 |
#25: Protein | Mass: 18521.770 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5Q1B0 |
-Protein/peptide , 3 types, 3 molecules xya
#27: Protein/peptide | Mass: 5808.645 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A6P3EDV0 |
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#28: Protein/peptide | Mass: 6146.106 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A7M4DUG1 |
#36: Protein/peptide | Mass: 5263.770 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: A0A836AFZ8 |
-NADH dehydrogenase [ubiquinone] flavoprotein ... , 2 types, 2 molecules 12
#30: Protein | Mass: 47186.676 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) References: UniProt: A0A835ZPN7, NADH:ubiquinone reductase (H+-translocating) |
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#31: Protein | Mass: 23598.193 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Ovis aries (sheep) / References: UniProt: W5NRY1 |
-Non-polymers , 11 types, 22 molecules
#45: Chemical | ChemComp-PC1 / #46: Chemical | #47: Chemical | ChemComp-AMP / | #48: Chemical | ChemComp-MYR / | #49: Chemical | ChemComp-SF4 / #50: Chemical | ChemComp-FMN / | #51: Chemical | ChemComp-NAI / | #52: Chemical | #53: Chemical | ChemComp-K / | #54: Chemical | ChemComp-ZN / | #55: Chemical | ChemComp-NDP / | |
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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 |
-Sample preparation
Component | Name: Complex I from Ovis aries at pH9, Closed state / Type: COMPLEX / Entity ID: #1-#44 / Source: NATURAL |
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Molecular weight | Value: 1 MDa / Experimental value: YES |
Source (natural) | Organism: Ovis aries (sheep) |
Buffer solution | pH: 9 |
Specimen | Conc.: 3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: COPPER / Grid type: Quantifoil R0.6/1 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
-Electron microscopy imaging
Microscopy | Model: TFS GLACIOS |
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Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 120000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm |
Specimen holder | Cryogen: NITROGEN |
Image recording | Average exposure time: 3.3 sec. / Electron dose: 90 e/Å2 / Film or detector model: FEI FALCON III (4k x 4k) |
-Processing
Software | Name: PHENIX / Version: dev_4092: / Classification: refinement | ||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 41421 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: correlation coefficient | ||||||||||||||||||||||||
Atomic model building | PDB-ID: 6ZKC | ||||||||||||||||||||||||
Refine LS restraints |
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