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Yorodumi- EMDB-81438: In situ structure of the side-by-side PSII-LHCII dimer from Oryza... -
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Basic information
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| Title | In situ structure of the side-by-side PSII-LHCII dimer from Oryza sativa (composite) | |||||||||
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Keywords | Photosystem II / in situ / side-by-side / Oryza sativa / Chloroplast / Photosynthesis | |||||||||
| Function / homology | Function and homology informationchloroplast photosystem II / chloroplast thylakoid / photosynthesis, light harvesting / photosystem II oxygen evolving complex / photosystem II assembly / oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / photosynthetic electron transport chain ...chloroplast photosystem II / chloroplast thylakoid / photosynthesis, light harvesting / photosystem II oxygen evolving complex / photosystem II assembly / oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / photosynthetic electron transport chain / photosystem II / extrinsic component of membrane / chlorophyll binding / plastid / photosynthetic electron transport in photosystem II / photosynthesis, light reaction / phosphate ion binding / chloroplast thylakoid membrane / photosynthesis / electron transfer activity / protein stabilization / iron ion binding / mRNA binding / heme binding / calcium ion binding Similarity search - Function | |||||||||
| Biological species | ![]() | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||
Authors | Li J / Elias E / Zhang K / Croce R / Zhu J | |||||||||
| Funding support | China, 1 items
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Citation | Journal: Nature / Year: 2026Title: In situ structures of plant photosystem supercomplexes. Authors: Jiao Li / Eduard Elias / Kai Zhang / Roberta Croce / Jiapeng Zhu / ![]() Abstract: Photosynthesis sustains life on Earth by converting light to chemical energy through the coordinated action of photosystem I (PSI) and photosystem II (PSII) within thylakoid membranes. Although ...Photosynthesis sustains life on Earth by converting light to chemical energy through the coordinated action of photosystem I (PSI) and photosystem II (PSII) within thylakoid membranes. Although structures of isolated photosystems are available, their native organization in chloroplasts remains unknown. Here, using in situ cryo-electron microscopy, we directly imaged Oryza sativa (rice) chloroplasts and determined structures of photosystem supercomplexes in their native membrane environment. We resolved a CSML-type PSII-light harvesting complex II (LHCII) supercomplex, including four LHCII antenna trimers that were not retained in purified preparations. Excitation energy transfer calculations based on this architecture closely reproduce in vivo measurements, indicating its physiological relevance. We also resolved asymmetric PSII-LHCII dimers, including side-by-side, trans-lumenal and trans-stromal architectures, and higher-order assemblies of trimers and tetramers. On the basis of these observations, we propose that PSII forms a trans-lumenal and trans-stromal 'skeleton' that shapes thylakoid morphology and supports grana stacking. In addition, we obtained high-resolution structures of PSI-LHCI-LHCII and PSI-LHCI supercomplexes. Together, these structures reveal extensive networks of lipids, pigments and cofactors, providing the first molecular framework for understanding how the native architecture of plant photosystem supports the exceptional photon-to-electron efficiency of photosynthesis. | |||||||||
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Structure visualization
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_81438.map.gz | 23.1 MB | EMDB map data format | |
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| Header (meta data) | emd-81438-v30.xml emd-81438.xml | 39.7 KB 39.7 KB | Display Display | EMDB header |
| Images | emd_81438.png | 87.5 KB | ||
| Filedesc metadata | emd-81438.cif.gz | 8.7 KB | ||
| Others | emd_81438_half_map_1.map.gz emd_81438_half_map_2.map.gz | 37.5 MB 37.5 MB | ||
| Archive directory | https://data.pdbj.org/pub/emdb/structures/EMD-81438 ftp://data.pdbj.org/pub/emdb/structures/EMD-81438 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 27urMC ![]() 9xj1C ![]() 9xj9C C: citing same article ( M: atomic model generated by this map |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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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_81438.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.28 Å | ||||||||||||||||||||||||||||||||||||
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Half map: #2
| File | emd_81438_half_map_1.map | ||||||||||||
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| Density Histograms |
-Half map: #1
| File | emd_81438_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : Chloroplast
+Supramolecule #1: Chloroplast
+Macromolecule #1: Chlorophyll a-b binding protein 2, chloroplastic
+Macromolecule #2: Chlorophyll a/b-binding protein
+Macromolecule #3: Chlorophyll a-b binding protein, chloroplastic
+Macromolecule #4: Photosystem II protein D1
+Macromolecule #5: Photosystem II CP47 reaction center protein
+Macromolecule #6: Photosystem II CP43 reaction center protein
+Macromolecule #7: Photosystem II D2 protein
+Macromolecule #8: Cytochrome b559 subunit alpha
+Macromolecule #9: Cytochrome b559 subunit beta
+Macromolecule #10: Photosystem II reaction center protein H
+Macromolecule #11: Photosystem II reaction center protein I
+Macromolecule #12: Photosystem II reaction center protein J
+Macromolecule #13: Photosystem II reaction center protein K
+Macromolecule #14: Photosystem II reaction center protein L
+Macromolecule #15: Photosystem II reaction center protein M
+Macromolecule #16: 33 kDa subunit of oxygen evolving system of photosystem II
+Macromolecule #17: 23 kDa subunit of oxygen evolving system of photosystem II
+Macromolecule #18: Chlorophyll a-b binding protein, chloroplastic
+Macromolecule #19: Chlorophyll a-b binding protein, chloroplastic
+Macromolecule #20: Photosystem II reaction center protein T
+Macromolecule #21: Os02g0581100 protein
+Macromolecule #22: Photosystem II 10 kDa polypeptide, chloroplastic
+Macromolecule #23: Photosystem II reaction center W protein, chloroplastic
+Macromolecule #24: Os07g0673550 protein
+Macromolecule #25: cDNA clone:001-024-H10, full insert sequence
+Macromolecule #26: Photosystem II reaction center protein Z
+Macromolecule #27: BICARBONATE ION
-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: 7.3 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 1.375 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.4000000000000001 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Authors
China, 1 items
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Processing
FIELD EMISSION GUN

