+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-13214 | |||||||||
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Title | Complex I from E. coli, DDM-purified, with NADH, Resting state | |||||||||
Map data | ||||||||||
Sample |
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Keywords | Complex I / NADH / Quinone / PROTON TRANSPORT | |||||||||
Function / homology | Function and homology information : / NADH dehydrogenase complex / Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions / NADH:ubiquinone reductase (non-electrogenic) activity / oxidoreductase complex / molybdopterin cofactor binding / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / ubiquinone binding / NADH dehydrogenase activity / electron transport coupled proton transport ...: / NADH dehydrogenase complex / Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions / NADH:ubiquinone reductase (non-electrogenic) activity / oxidoreductase complex / molybdopterin cofactor binding / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / ubiquinone binding / NADH dehydrogenase activity / electron transport coupled proton transport / respiratory chain complex I / NADH dehydrogenase (ubiquinone) activity / ATP synthesis coupled electron transport / quinone binding / aerobic respiration / 2 iron, 2 sulfur cluster binding / NAD binding / FMN binding / 4 iron, 4 sulfur cluster binding / iron ion binding / membrane / metal ion binding / plasma membrane Similarity search - Function | |||||||||
Biological species | Escherichia coli (E. coli) / Escherichia coli BL21(DE3) (bacteria) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
Authors | Kravchuk V / Kampjut D / Sazanov L | |||||||||
Funding support | Austria, 1 items
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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
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_13214.map.gz | 2.7 MB | EMDB map data format | |
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Header (meta data) | emd-13214-v30.xml emd-13214.xml | 38.2 KB 38.2 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_13214_fsc.xml | 17.8 KB | Display | FSC data file |
Images | emd_13214.png | 78.8 KB | ||
Filedesc metadata | emd-13214.cif.gz | 10 KB | ||
Others | emd_13214_additional_1.map.gz emd_13214_additional_2.map.gz | 268.6 MB 269.3 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-13214 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-13214 | HTTPS FTP |
-Validation report
Summary document | emd_13214_validation.pdf.gz | 449.9 KB | Display | EMDB validaton report |
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Full document | emd_13214_full_validation.pdf.gz | 449.4 KB | Display | |
Data in XML | emd_13214_validation.xml.gz | 12.1 KB | Display | |
Data in CIF | emd_13214_validation.cif.gz | 17.6 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-13214 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-13214 | HTTPS FTP |
-Related structure data
Related structure data | 7p61MC 7p62C 7p63C 7p64C 7p69C 7p7cC 7p7eC 7p7jC 7p7kC 7p7lC 7p7mC 7z7rC 7z7sC 7z7tC 7z7vC 7z80C 7z83C 7z84C 7zc5C 7zciC 7zd6C 7zdhC 7zdjC 7zdmC 7zdpC 7zebC C: citing same article (ref.) M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_13214.map.gz / Format: CCP4 / Size: 25.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. generated in cubic-lattice coordinate | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.061 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: DDM NADH PA focused
File | emd_13214_additional_1.map | ||||||||||||
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Annotation | DDM NADH PA focused | ||||||||||||
Projections & Slices |
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Density Histograms |
-Additional map: DDM NADH MD focused
File | emd_13214_additional_2.map | ||||||||||||
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Annotation | DDM NADH MD focused | ||||||||||||
Projections & Slices |
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Density Histograms |
-Sample components
+Entire : Complex I
+Supramolecule #1: Complex I
+Macromolecule #1: NADH-quinone oxidoreductase subunit F
+Macromolecule #2: NADH dehydrogenase I subunit E
+Macromolecule #3: NADH-quinone oxidoreductase
+Macromolecule #4: NADH-quinone oxidoreductase subunit C/D
+Macromolecule #5: NADH-quinone oxidoreductase subunit B
+Macromolecule #6: NADH-quinone oxidoreductase subunit I
+Macromolecule #7: Proton-translocating NADH-quinone oxidoreductase, chain L
+Macromolecule #8: NADH dehydrogenase I subunit M
+Macromolecule #9: NADH-quinone oxidoreductase subunit N
+Macromolecule #10: NADH-quinone oxidoreductase subunit H
+Macromolecule #11: NADH-quinone oxidoreductase subunit A
+Macromolecule #12: NADH-quinone oxidoreductase subunit K
+Macromolecule #13: NADH-quinone oxidoreductase subunit J
+Macromolecule #14: IRON/SULFUR CLUSTER
+Macromolecule #15: FLAVIN MONONUCLEOTIDE
+Macromolecule #16: 1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE
+Macromolecule #17: FE2/S2 (INORGANIC) CLUSTER
+Macromolecule #18: CALCIUM ION
+Macromolecule #19: 1,2-Distearoyl-sn-glycerophosphoethanolamine
+Macromolecule #20: Ubiquinone-8
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 10 mg/mL | ||||||||||||||||||
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Buffer | pH: 6 Component:
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Grid | Model: Quantifoil R0.6/1 / Material: COPPER / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 120 sec. | ||||||||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: INTEGRATING / Number grids imaged: 1 / Number real images: 3492 / Average electron dose: 89.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 130000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |