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Yorodumi- EMDB-22448: Plant Mitochondrial complex SC III2+IV from Vigna radiata composi... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-22448 | |||||||||
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Title | Plant Mitochondrial complex SC III2+IV from Vigna radiata composite map | |||||||||
Map data | Plant mitochondrial supercomplex III2 IV from Vigna radiata. Composite map. | |||||||||
Sample |
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Function / homology | Function and homology information respiratory chain complex IV / : / : / : / quinol-cytochrome-c reductase / ubiquinol-cytochrome-c reductase activity / mitochondrial electron transport, cytochrome c to oxygen / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / ATP synthesis coupled electron transport ...respiratory chain complex IV / : / : / : / quinol-cytochrome-c reductase / ubiquinol-cytochrome-c reductase activity / mitochondrial electron transport, cytochrome c to oxygen / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / ATP synthesis coupled electron transport / : / enzyme regulator activity / metalloendopeptidase activity / 2 iron, 2 sulfur cluster binding / mitochondrial inner membrane / electron transfer activity / copper ion binding / heme binding / mitochondrion / proteolysis / membrane / metal ion binding Similarity search - Function | |||||||||
Biological species | Vigna radiata (mung bean) / Mung bean (mung bean) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.8 Å | |||||||||
Authors | Maldonado M / Letts JA | |||||||||
Citation | Journal: Elife / Year: 2021 Title: Atomic structures of respiratory complex III, complex IV, and supercomplex III-IV from vascular plants. Authors: Maria Maldonado / Fei Guo / James A Letts / Abstract: Mitochondrial complex III (CIII) and complex IV (CIV), which can associate into a higher-order supercomplex (SC III+IV), play key roles in respiration. However, structures of these plant complexes ...Mitochondrial complex III (CIII) and complex IV (CIV), which can associate into a higher-order supercomplex (SC III+IV), play key roles in respiration. However, structures of these plant complexes remain unknown. We present atomic models of CIII, CIV, and SC III+IV from determined by single-particle cryoEM. The structures reveal plant-specific differences in the MPP domain of CIII and define the subunit composition of CIV. Conformational heterogeneity analysis of CIII revealed long-range, coordinated movements across the complex, as well as the motion of CIII's iron-sulfur head domain. The CIV structure suggests that, in plants, proton translocation does not occur via the H channel. The supercomplex interface differs significantly from that in yeast and bacteria in its interacting subunits, angle of approach and limited interactions in the mitochondrial matrix. These structures challenge long-standing assumptions about the plant complexes and generate new mechanistic hypotheses. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_22448.map.gz | 450.4 MB | EMDB map data format | |
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Header (meta data) | emd-22448-v30.xml emd-22448.xml | 35.3 KB 35.3 KB | Display Display | EMDB header |
Images | emd_22448.png | 100.7 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-22448 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-22448 | HTTPS FTP |
-Validation report
Summary document | emd_22448_validation.pdf.gz | 501.3 KB | Display | EMDB validaton report |
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Full document | emd_22448_full_validation.pdf.gz | 500.9 KB | Display | |
Data in XML | emd_22448_validation.xml.gz | 8.3 KB | Display | |
Data in CIF | emd_22448_validation.cif.gz | 9.6 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-22448 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-22448 | HTTPS FTP |
-Related structure data
Related structure data | 7jrpMC 7jrgC 7jroC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | |
EM raw data | EMPIAR-10586 (Title: Cryo electron micrographs of digitonin-solubilized, amphipol-stabilized, sucrose-gradient-purified V. radiata mitochondrial membranes - mixed fraction containing CI*, CIII2 and SC III2+IV Data size: 6.7 TB Data #1: Raw movies of mixed sample used for determination of mung bean respiratory CI*, CIII2, CIV and SC III2+IV [micrographs - multiframe]) |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_22448.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Plant mitochondrial supercomplex III2 IV from Vigna radiata. Composite map. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.8332 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
+Entire : Mitochondrial Respiratory Complex III2
+Supramolecule #1: Mitochondrial Respiratory Complex III2
+Macromolecule #1: Mitochondrial-processing peptidase subunit beta, mitochondrial is...
+Macromolecule #2: Alpha-MPP
+Macromolecule #3: COB
+Macromolecule #4: cytochrome c1-2, heme protein, mitochondrial
+Macromolecule #5: Cytochrome b-c1 complex subunit Rieske, mitochondrial
+Macromolecule #6: Cytochrome b-c1 complex subunit 7
+Macromolecule #7: cytochrome b-c1 complex subunit 8
+Macromolecule #8: Cytochrome b-c1 complex subunit 6
+Macromolecule #9: cytochrome b-c1 complex subunit 9
+Macromolecule #10: QCR10
+Macromolecule #11: COX1
+Macromolecule #12: Cytochrome c oxidase subunit 2
+Macromolecule #13: COX3
+Macromolecule #14: COX4
+Macromolecule #15: cytochrome c oxidase subunit 5b-2, mitochondrial
+Macromolecule #16: cytochrome c oxidase subunit 6a, mitochondrial
+Macromolecule #17: cytochrome c oxidase subunit 6b-1
+Macromolecule #18: Cytochrome c oxidase subunit 5C
+Macromolecule #19: COX7a
+Macromolecule #20: COX7c
+Macromolecule #21: ZINC ION
+Macromolecule #22: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE
+Macromolecule #23: CARDIOLIPIN
+Macromolecule #24: PROTOPORPHYRIN IX CONTAINING FE
+Macromolecule #25: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE
+Macromolecule #26: HEME C
+Macromolecule #27: HEME-A
+Macromolecule #28: COPPER (II) ION
+Macromolecule #29: MAGNESIUM ION
+Macromolecule #30: DINUCLEAR COPPER ION
+Macromolecule #31: LYSINE
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 6 mg/mL | |||||||||||||||
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Buffer | pH: 7.8 Component:
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Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR | |||||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 288 K / Instrument: FEI VITROBOT MARK III | |||||||||||||||
Details | This sample was monodisperse on size exclusion chromatography but was a mixture of different mitochondrial respiratory complexes |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 9816 / Average exposure time: 3.0 sec. / Average electron dose: 86.4 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Calibrated defocus max: 3.0 µm / Calibrated defocus min: 1.5 µm / Calibrated magnification: 60010 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |