+Open data
-Basic information
Entry | Database: PDB / ID: 7a23 | |||||||||
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Title | Plant mitochondrial respiratory complex I | |||||||||
Components |
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Keywords | MEMBRANE PROTEIN / Respiration / Complex I / mitochondria / plant | |||||||||
Function / homology | Function and homology information cold acclimation / Lyases; Carbon-oxygen lyases; Hydro-lyases / NADH dehydrogenase complex / photorespiration / embryo development ending in seed dormancy / plant-type vacuole / response to osmotic stress / plastid / cobalt ion binding / ubiquinone binding ...cold acclimation / Lyases; Carbon-oxygen lyases; Hydro-lyases / NADH dehydrogenase complex / photorespiration / embryo development ending in seed dormancy / plant-type vacuole / response to osmotic stress / plastid / cobalt ion binding / ubiquinone binding / protein homotrimerization / NADH:ubiquinone reductase (H+-translocating) / NADH dehydrogenase activity / respiratory chain complex I / : / mitochondrial electron transport, NADH to ubiquinone / mitochondrial respiratory chain complex I assembly / electron transport coupled proton transport / acyl carrier activity / NADH dehydrogenase (ubiquinone) activity / ATP synthesis coupled electron transport / quinone binding / : / aerobic respiration / respiratory electron transport chain / proton transmembrane transport / chloroplast / carbonate dehydratase activity / mitochondrial membrane / electron transport chain / mitochondrial intermembrane space / fatty acid biosynthetic process / 2 iron, 2 sulfur cluster binding / NAD binding / peroxisome / FMN binding / 4 iron, 4 sulfur cluster binding / carbohydrate metabolic process / mitochondrial inner membrane / mitochondrial matrix / copper ion binding / nucleolus / mitochondrion / zinc ion binding / extracellular region / nucleus / metal ion binding / plasma membrane / cytosol Similarity search - Function | |||||||||
Biological species | Brassica oleracea (wild cabbage) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||
Authors | Soufari, H. / Waltz, F. / Hashem, Y. | |||||||||
Funding support | France, 2items
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Citation | Journal: Nat Commun / Year: 2020 Title: Specific features and assembly of the plant mitochondrial complex I revealed by cryo-EM. Authors: Heddy Soufari / Camila Parrot / Lauriane Kuhn / Florent Waltz / Yaser Hashem / Abstract: Mitochondria are the powerhouses of eukaryotic cells and the site of essential metabolic reactions. Complex I or NADH:ubiquinone oxidoreductase is the main entry site for electrons into the ...Mitochondria are the powerhouses of eukaryotic cells and the site of essential metabolic reactions. Complex I or NADH:ubiquinone oxidoreductase is the main entry site for electrons into the mitochondrial respiratory chain and constitutes the largest of the respiratory complexes. Its structure and composition vary across eukaryote species. However, high resolution structures are available only for one group of eukaryotes, opisthokonts. In plants, only biochemical studies were carried out, already hinting at the peculiar composition of complex I in the green lineage. Here, we report several cryo-electron microscopy structures of the plant mitochondrial complex I. We describe the structure and composition of the plant respiratory complex I, including the ancestral mitochondrial domain composed of the carbonic anhydrase. We show that the carbonic anhydrase is a heterotrimeric complex with only one conserved active site. This domain is crucial for the overall stability of complex I as well as a peculiar lipid complex composed of cardiolipin and phosphatidylinositols. Moreover, we also describe the structure of one of the plant-specific complex I assembly intermediates, lacking the whole P module, in presence of the maturation factor GLDH. GLDH prevents the binding of the plant specific P1 protein, responsible for the linkage of the P to the P module. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 7a23.cif.gz | 1.3 MB | Display | PDBx/mmCIF format |
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PDB format | pdb7a23.ent.gz | 1 MB | Display | PDB format |
PDBx/mmJSON format | 7a23.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 7a23_validation.pdf.gz | 1.6 MB | Display | wwPDB validaton report |
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Full document | 7a23_full_validation.pdf.gz | 1.6 MB | Display | |
Data in XML | 7a23_validation.xml.gz | 171.8 KB | Display | |
Data in CIF | 7a23_validation.cif.gz | 272.4 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/a2/7a23 ftp://data.pdbj.org/pub/pdb/validation_reports/a2/7a23 | HTTPS FTP |
-Related structure data
Related structure data | 11614MC 7a24C C: citing same article (ref.) M: map data used to model this data |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
+Protein , 42 types, 43 molecules AIJNHKYZVWSijGCTFBOPRUEDXcQkno...
-Protein/peptide , 2 types, 2 molecules rs
#29: Protein/peptide | Mass: 1723.883 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Brassica oleracea (wild cabbage) |
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#42: Protein/peptide | Mass: 1439.571 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Brassica oleracea (wild cabbage) |
-Non-polymers , 10 types, 20 molecules
#45: Chemical | ChemComp-SF4 / #46: Chemical | ChemComp-FMN / | #47: Chemical | #48: Chemical | #49: Chemical | ChemComp-U10 / | #50: Chemical | ChemComp-PEV / ( | #51: Chemical | #52: Chemical | ChemComp-NDP / | #53: Chemical | #54: Chemical | ChemComp-BCT / | |
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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: Mitochondrial respiratory complex I / Type: COMPLEX / Entity ID: #1-#44 / Source: NATURAL |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: Brassica oleracea (wild cabbage) / Organ: Flower / Organelle: Mitochondria |
Buffer solution | pH: 7.5 |
Specimen | Conc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: COPPER / Grid type: Quantifoil R2/2 |
Vitrification | Cryogen name: ETHANE / Humidity: 100 % |
-Electron microscopy imaging
Experimental equipment | Model: Talos Arctica / Image courtesy: FEI Company |
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Microscopy | Model: FEI TALOS ARCTICA |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 45 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||
3D reconstruction | Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 65018 / Symmetry type: POINT |