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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-12653 | |||||||||
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Title | Respiratory complex I from Escherichia coli - conformation 1 | |||||||||
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Function / homology | ![]() NADH dehydrogenase complex / : / NADH:ubiquinone reductase (non-electrogenic) activity / Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / molybdopterin cofactor binding / respiratory chain complex I / cellular respiration / ubiquinone binding / NADH dehydrogenase (ubiquinone) activity ...NADH dehydrogenase complex / : / NADH:ubiquinone reductase (non-electrogenic) activity / Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / molybdopterin cofactor binding / respiratory chain complex I / cellular respiration / ubiquinone binding / NADH dehydrogenase (ubiquinone) activity / quinone binding / electron transport coupled proton transport / ATP synthesis coupled electron transport / aerobic respiration / respiratory electron transport chain / transmembrane transport / 2 iron, 2 sulfur cluster binding / NAD binding / FMN binding / 4 iron, 4 sulfur cluster binding / oxidoreductase activity / iron ion binding / membrane / metal ion binding / plasma membrane / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.3 Å | |||||||||
![]() | Kolata P / Efremov RG | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structure of respiratory complex I reconstituted into lipid nanodiscs reveals an uncoupled conformation. Authors: Piotr Kolata / Rouslan G Efremov / ![]() Abstract: Respiratory complex I is a multi-subunit membrane protein complex that reversibly couples NADH oxidation and ubiquinone reduction with proton translocation against transmembrane potential. Complex I ...Respiratory complex I is a multi-subunit membrane protein complex that reversibly couples NADH oxidation and ubiquinone reduction with proton translocation against transmembrane potential. Complex I from is among the best functionally characterized complexes, but its structure remains unknown, hindering further studies to understand the enzyme coupling mechanism. Here, we describe the single particle cryo-electron microscopy (cryo-EM) structure of the entire catalytically active complex I reconstituted into lipid nanodiscs. The structure of this mesophilic bacterial complex I displays highly dynamic connection between the peripheral and membrane domains. The peripheral domain assembly is stabilized by unique terminal extensions and an insertion loop. The membrane domain structure reveals novel dynamic features. Unusual conformation of the conserved interface between the peripheral and membrane domains suggests an uncoupled conformation of the complex. Considering constraints imposed by the structural data, we suggest a new simple hypothetical coupling mechanism for the molecular machine. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 118 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 35.8 KB 35.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 14.6 KB | Display | ![]() |
Images | ![]() | 42.3 KB | ||
Others | ![]() ![]() | 98.4 MB 98.4 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7nyrMC ![]() 7nyhC ![]() 7nyuC ![]() 7nyvC ![]() 7nz1C C: citing same article ( M: atomic model generated by this map |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.1568 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Half map: #2
File | emd_12653_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_12653_half_map_2.map | ||||||||||||
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Density Histograms |
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Sample components
+Entire : Respiratory complex I from Escherichia coli - conformation 1
+Supramolecule #1: Respiratory complex I from Escherichia coli - conformation 1
+Macromolecule #1: NADH-quinone oxidoreductase subunit B
+Macromolecule #2: NADH-quinone oxidoreductase subunit C/D
+Macromolecule #3: NADH-quinone oxidoreductase subunit E
+Macromolecule #4: NADH-quinone oxidoreductase subunit F
+Macromolecule #5: NADH-quinone oxidoreductase subunit G
+Macromolecule #6: NADH-quinone oxidoreductase subunit I
+Macromolecule #7: NADH-quinone oxidoreductase subunit K
+Macromolecule #8: NADH-quinone oxidoreductase subunit J
+Macromolecule #9: NADH-quinone oxidoreductase subunit A
+Macromolecule #10: NADH-quinone oxidoreductase subunit H
+Macromolecule #11: NADH-quinone oxidoreductase subunit M
+Macromolecule #12: NADH-quinone oxidoreductase subunit L
+Macromolecule #13: NADH-quinone oxidoreductase subunit N
+Macromolecule #14: IRON/SULFUR CLUSTER
+Macromolecule #15: FE2/S2 (INORGANIC) CLUSTER
+Macromolecule #16: FLAVIN MONONUCLEOTIDE
+Macromolecule #17: CALCIUM ION
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.1 mg/mL | ||||||||||||
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Buffer | pH: 6.8 Component:
Details: The buffer was used for gel filtration of protein reconstituted in lipid nanodiscs | ||||||||||||
Grid | Model: Quantifoil R0.6/1 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY ARRAY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 0.028 kPa | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 97 % / Chamber temperature: 296 K / Instrument: GATAN CRYOPLUNGE 3 |
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Electron microscopy
Microscope | JEOL CRYO ARM 300 |
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Specialist optics | Energy filter - Name: In-column Omega Filter / Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Number real images: 9122 / Average exposure time: 3.0 sec. / Average electron dose: 64.7 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.55 mm / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.9 µm / Nominal magnification: 60000 |
Sample stage | Specimen holder model: JEOL CRYOSPECPORTER / Cooling holder cryogen: NITROGEN |