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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-31350 | |||||||||
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| Title | Barley photosystem I-LHCI-Lhca6 supercomplex | |||||||||
Map data | PSI-LHCI-A6 supercomplex | |||||||||
Sample |
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Keywords | Photosystem I / Light-harvesting complex / Lhca6 / cyclic electron transport / Photosynthesis | |||||||||
| Function / homology | Function and homology informationphotosynthesis, light harvesting / photosystem I / photosystem I / photosystem II / chlorophyll binding / chloroplast thylakoid membrane / photosynthesis / 4 iron, 4 sulfur cluster binding / electron transfer activity / oxidoreductase activity / magnesium ion binding Similarity search - Function | |||||||||
| Biological species | ![]() ![]() | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.88 Å | |||||||||
Authors | Wang WD / Shen L | |||||||||
| Funding support | China, 1 items
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Citation | Journal: Nature / Year: 2022Title: Architecture of the chloroplast PSI-NDH supercomplex in Hordeum vulgare. Authors: Liangliang Shen / Kailu Tang / Wenda Wang / Chen Wang / Hangjun Wu / Zhiyuan Mao / Shaoya An / Shenghai Chang / Tingyun Kuang / Jian-Ren Shen / Guangye Han / Xing Zhang / ![]() Abstract: The chloroplast NADH dehydrogenase-like (NDH) complex is composed of at least 29 subunits and has an important role in mediating photosystem I (PSI) cyclic electron transport (CET). The NDH complex ...The chloroplast NADH dehydrogenase-like (NDH) complex is composed of at least 29 subunits and has an important role in mediating photosystem I (PSI) cyclic electron transport (CET). The NDH complex associates with PSI to form the PSI-NDH supercomplex and fulfil its function. Here, we report cryo-electron microscopy structures of a PSI-NDH supercomplex from barley (Hordeum vulgare). The structures reveal that PSI-NDH is composed of two copies of the PSI-light-harvesting complex I (LHCI) subcomplex and one NDH complex. Two monomeric LHCI proteins, Lhca5 and Lhca6, mediate the binding of two PSI complexes to NDH. Ten plant chloroplast-specific NDH subunits are presented and their exact positions as well as their interactions with other subunits in NDH are elucidated. In all, this study provides a structural basis for further investigations on the functions and regulation of PSI-NDH-dependent CET. | |||||||||
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Structure visualization
| Movie |
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
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Downloads & links
-EMDB archive
| Map data | emd_31350.map.gz | 307.1 MB | EMDB map data format | |
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| Header (meta data) | emd-31350-v30.xml emd-31350.xml | 27.7 KB 27.7 KB | Display Display | EMDB header |
| Images | emd_31350.png | 63.3 KB | ||
| Filedesc metadata | emd-31350.cif.gz | 8.1 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-31350 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-31350 | HTTPS FTP |
-Validation report
| Summary document | emd_31350_validation.pdf.gz | 559.2 KB | Display | EMDB validaton report |
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| Full document | emd_31350_full_validation.pdf.gz | 558.8 KB | Display | |
| Data in XML | emd_31350_validation.xml.gz | 7.3 KB | Display | |
| Data in CIF | emd_31350_validation.cif.gz | 8.4 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-31350 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-31350 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7ewkMC ![]() 7eu3C ![]() 7ew6C ![]() 7f9oC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_31350.map.gz / Format: CCP4 / Size: 325 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Annotation | PSI-LHCI-A6 supercomplex | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.307 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : PSI-LHCI-Lhca6 supercomplex of Barley
+Supramolecule #1: PSI-LHCI-Lhca6 supercomplex of Barley
+Macromolecule #1: Photosystem I P700 chlorophyll a apoprotein A1
+Macromolecule #2: Photosystem I P700 chlorophyll a apoprotein A2
+Macromolecule #3: Photosystem I iron-sulfur center
+Macromolecule #4: Photosystem I reaction center subunit D
+Macromolecule #5: Photosystem I reaction center subunit E
+Macromolecule #6: Photosystem I reaction center subunit F
+Macromolecule #7: Photosystem I reaction center subunit H
+Macromolecule #8: Photosystem I reaction center subunit VIII
+Macromolecule #9: Photosystem I reaction center subunit IX
+Macromolecule #10: Photosystem I reaction center subunit K
+Macromolecule #11: Photosystem I reaction center subunit L
+Macromolecule #12: Chlorophyll a-b binding protein Lhca1
+Macromolecule #13: Chlorophyll a-b binding protein Lhca3
+Macromolecule #14: Chlorophyll a-b binding protein, chloroplastic
+Macromolecule #15: Chlorophyll a-b binding protein Lhca6
+Macromolecule #16: CHLOROPHYLL A ISOMER
+Macromolecule #17: CHLOROPHYLL A
+Macromolecule #18: PHYLLOQUINONE
+Macromolecule #19: 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE
+Macromolecule #20: BETA-CAROTENE
+Macromolecule #21: IRON/SULFUR CLUSTER
+Macromolecule #22: DIGALACTOSYL DIACYL GLYCEROL (DGDG)
+Macromolecule #23: 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
+Macromolecule #24: (3R,3'R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL
+Macromolecule #25: CHLOROPHYLL B
+Macromolecule #26: (3S,5R,6S,3'S,5'R,6'S)-5,6,5',6'-DIEPOXY-5,6,5',6'- TETRAHYDRO-BE...
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.5 |
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| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 50.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 2.0 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
| Startup model | Type of model: OTHER |
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| Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.88 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 103844 |
| Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
| Final angle assignment | Type: MAXIMUM LIKELIHOOD |
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Keywords
Authors
China, 1 items
Citation
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