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Yorodumi- EMDB-60026: Cryo-EM structure of an intermediate-state PSII-PRF2' complex dur... -
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Basic information
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| Title | Cryo-EM structure of an intermediate-state PSII-PRF2' complex during the process of photosystem II repair | ||||||||||||
Map data | The cryo-EM map of the PSII-PRF2' complex functioning in the PSII-repair cycle. | ||||||||||||
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Keywords | PHOTOSYNTHESIS | ||||||||||||
| Function / homology | Function and homology informationoxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / photosynthetic electron transport chain / photosystem II / response to herbicide / chlorophyll binding / photosynthetic electron transport in photosystem II ...oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / photosystem II / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / photosynthetic electron transport chain / photosystem II / response to herbicide / chlorophyll binding / photosynthetic electron transport in photosystem II / : / phosphate ion binding / chloroplast thylakoid membrane / photosynthesis, light reaction / photosynthesis / electron transfer activity / protein stabilization / iron ion binding / heme binding / metal ion binding Similarity search - Function | ||||||||||||
| Biological species | ![]() | ||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.9 Å | ||||||||||||
Authors | Li A / Liu Z | ||||||||||||
| Funding support | China, 3 items
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Citation | Journal: Nat Commun / Year: 2024Title: Structural basis for an early stage of the photosystem II repair cycle in Chlamydomonas reinhardtii. Authors: Anjie Li / Tingting You / Xiaojie Pang / Yidi Wang / Lijin Tian / Xiaobo Li / Zhenfeng Liu / ![]() Abstract: Photosystem II (PSII) catalyzes water oxidation and plastoquinone reduction by utilizing light energy. It is highly susceptible to photodamage under high-light conditions and the damaged PSII needs ...Photosystem II (PSII) catalyzes water oxidation and plastoquinone reduction by utilizing light energy. It is highly susceptible to photodamage under high-light conditions and the damaged PSII needs to be restored through a process known as the PSII repair cycle. The detailed molecular mechanism underlying the PSII repair process remains mostly elusive. Here, we report biochemical and structural features of a PSII-repair intermediate complex, likely arrested at an early stage of the PSII repair process in the green alga Chlamydomonas reinhardtii. The complex contains three protein factors associated with a damaged PSII core, namely Thylakoid Enriched Factor 14 (TEF14), Photosystem II Repair Factor 1 (PRF1), and Photosystem II Repair Factor 2 (PRF2). TEF14, PRF1 and PRF2 may facilitate the release of the manganese-stabilizing protein PsbO, disassembly of peripheral light-harvesting complexes from PSII and blockage of the Q site, respectively. Moreover, an α-tocopherol quinone molecule is located adjacent to the heme group of cytochrome b, potentially fulfilling a photoprotective role by preventing the generation of reactive oxygen species. | ||||||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_60026.map.gz | 31.3 MB | EMDB map data format | |
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| Header (meta data) | emd-60026-v30.xml emd-60026.xml | 33.4 KB 33.4 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_60026_fsc.xml | 7.4 KB | Display | FSC data file |
| Images | emd_60026.png | 130.3 KB | ||
| Filedesc metadata | emd-60026.cif.gz | 8.1 KB | ||
| Others | emd_60026_half_map_1.map.gz emd_60026_half_map_2.map.gz | 26.5 MB 26.5 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-60026 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-60026 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8zeeMC ![]() 8kdeC M: atomic model generated by this map C: citing same article ( |
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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_60026.map.gz / Format: CCP4 / Size: 34.3 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | The cryo-EM map of the PSII-PRF2' complex functioning in the PSII-repair cycle. | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.35 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Half map: The half cryo-EM map of the PSII-PRF2' complex...
| File | emd_60026_half_map_1.map | ||||||||||||
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| Annotation | The half cryo-EM map of the PSII-PRF2' complex functioning in the PSII-repair cycle. | ||||||||||||
| Projections & Slices |
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| Density Histograms |
-Half map: The half cryo-EM map of the PSII-PRF2' complex...
| File | emd_60026_half_map_2.map | ||||||||||||
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| Annotation | The half cryo-EM map of the PSII-PRF2' complex functioning in the PSII-repair cycle. | ||||||||||||
| Projections & Slices |
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| Density Histograms |
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Sample components
+Entire : Cryo-EM map of the PSII-PRF2' complex functioning in the PSII-rep...
+Supramolecule #1: Cryo-EM map of the PSII-PRF2' complex functioning in the PSII-rep...
+Macromolecule #1: Photosystem II CP47 reaction center protein
+Macromolecule #2: Photosystem II D2 protein
+Macromolecule #3: Cytochrome b559 subunit alpha
+Macromolecule #4: Cytochrome b559 subunit beta
+Macromolecule #5: Photosystem II reaction center protein H
+Macromolecule #6: Photosystem II reaction center protein I
+Macromolecule #7: Photosystem II reaction center protein K
+Macromolecule #8: Photosystem II reaction center protein L
+Macromolecule #9: Photosystem II reaction center protein M
+Macromolecule #10: Photosystem II reaction center protein T
+Macromolecule #11: Photosystem II reaction center protein Psb30
+Macromolecule #12: 4.1 kDa photosystem II subunit
+Macromolecule #13: Photosystem II reaction center protein Z
+Macromolecule #14: Photosystem II CP43 reaction center protein
+Macromolecule #15: Photosystem II protein D1
+Macromolecule #16: Chains: 1
+Macromolecule #17: CHLOROPHYLL A
+Macromolecule #18: BETA-CAROTENE
+Macromolecule #19: 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
+Macromolecule #20: 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE
+Macromolecule #21: BICARBONATE ION
+Macromolecule #22: 2,3-DIMETHYL-5-(3,7,11,15,19,23,27,31,35-NONAMETHYL-2,6,10,14,18,...
+Macromolecule #23: PHEOPHYTIN A
+Macromolecule #24: PROTOPORPHYRIN IX CONTAINING FE
+Macromolecule #25: RRR-ALPHA-TOCOPHERYLQUINONE
+Macromolecule #26: DIGALACTOSYL DIACYL GLYCEROL (DGDG)
+Macromolecule #27: 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL
+Macromolecule #28: FE (II) 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: 6.5 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 60.0 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: 1.5 µm / Nominal defocus min: 1.0 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Authors
China, 3 items
Citation








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Processing
FIELD EMISSION GUN

