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Yorodumi- EMDB-38455: Structure of inactive Photosystem II associated with CAC antenna ... -
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Open data
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Basic information
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| Title | Structure of inactive Photosystem II associated with CAC antenna from Rhodomonas Salina | |||||||||
Map data | Composite map of PSII-CAC supercomplex from Rhodomonas Salina | |||||||||
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Keywords | Photosystem II associated with CAC antenna from Rhodomonas Salina / PHOTOSYNTHESIS | |||||||||
| Function / homology | Function and homology informationphotosystem 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 / : ...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 / electron transfer activity / oxidoreductase activity / protein stabilization / iron ion binding / heme binding / metal ion binding Similarity search - Function | |||||||||
| Biological species | Rhodomonas salina (eukaryote) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.57 Å | |||||||||
Authors | Si L / Li M | |||||||||
| Funding support | China, 1 items
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Citation | Journal: Nat Commun / Year: 2024Title: Structural basis for the distinct core-antenna assembly of cryptophyte photosystem II. Authors: Long Si / Shumeng Zhang / Xiaodong Su / Mei Li / ![]() Abstract: Photosystem II (PSII) catalyzes the light-driven charge separation and water oxidation reactions of photosynthesis. Eukaryotic PSII core is usually associated with membrane-embedded light-harvesting ...Photosystem II (PSII) catalyzes the light-driven charge separation and water oxidation reactions of photosynthesis. Eukaryotic PSII core is usually associated with membrane-embedded light-harvesting antennae, which greatly increase the absorbance cross-section of the core. The peripheral antennae in different phototrophs vary considerably in protein composition and arrangement. Photosynthetic cryptophytes possess chlorophyll a/c binding proteins (CACs) that serve as their antennae. How these CACs assemble with the PSII core remains unclear. Here, we report the 2.57-Å resolution structure of cryptophyte PSII-CAC purified from cells at nitrogen-limited stationary growth phase. We show that each monomer of the PSII homodimer contains a core complex, six chlorophyll a/c binding proteins (CACs) and a previously unseen chlorophyll-binding protein (termed CAL-II). Six CACs are arranged as a double-layered arc-shaped non-parallel belt, and two such belts attach to the dimeric core from opposite sides. The CAL-II simultaneously interacts with a number of core subunits and five CACs. The distinct organization of CACs and the presence of CAL-II may play a critical role in stabilizing the dimeric PSII-CAC complex under stress conditions. Our study provides mechanistic insights into the assembly and function of the PSII-CAC complex as well as the possible adaptation of cryptophytes in response to environmental stresses. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_38455.map.gz | 9.1 MB | EMDB map data format | |
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| Header (meta data) | emd-38455-v30.xml emd-38455.xml | 39.4 KB 39.4 KB | Display Display | EMDB header |
| Images | emd_38455.png | 126.8 KB | ||
| Filedesc metadata | emd-38455.cif.gz | 10.1 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-38455 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-38455 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8xlpMC 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_38455.map.gz / Format: CCP4 / Size: 274.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | Composite map of PSII-CAC supercomplex from Rhodomonas Salina | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.04003 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Inactive Photosystem II associated with chlorophyll a/c binding p...
+Supramolecule #1: Inactive Photosystem II associated with chlorophyll a/c binding p...
+Macromolecule #1: Photosystem II protein D1
+Macromolecule #2: Photosystem II CP47 reaction center protein
+Macromolecule #3: Photosystem II CP43 reaction center protein
+Macromolecule #4: Photosystem II D2 protein
+Macromolecule #5: Cytochrome b559 subunit alpha
+Macromolecule #6: Cytochrome b559 subunit beta
+Macromolecule #7: Photosystem II reaction center protein H
+Macromolecule #8: Photosystem II reaction center protein I
+Macromolecule #9: Photosystem II reaction center protein K
+Macromolecule #10: Photosystem II reaction center protein L
+Macromolecule #11: Photosystem II protein M
+Macromolecule #12: Photosystem II reaction center protein T
+Macromolecule #13: Photosystem II protein W
+Macromolecule #14: Photosystem II reaction center X protein
+Macromolecule #15: Photosystem II reaction center protein Psb30
+Macromolecule #16: Photosystem II reaction center protein Z
+Macromolecule #17: NCP
+Macromolecule #18: CAC2
+Macromolecule #19: CAC3
+Macromolecule #20: CAC4
+Macromolecule #21: CAC5
+Macromolecule #22: CAC6
+Macromolecule #23: CAC1
+Macromolecule #24: FE (II) ION
+Macromolecule #25: CHLOROPHYLL A
+Macromolecule #26: PHEOPHYTIN A
+Macromolecule #27: 1,3,3-trimethyl-2-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tet...
+Macromolecule #28: 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL
+Macromolecule #29: 2,3-DIMETHYL-5-(3,7,11,15,19,23,27,31,35-NONAMETHYL-2,6,10,14,18,...
+Macromolecule #30: BICARBONATE ION
+Macromolecule #31: 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE
+Macromolecule #32: CHLORIDE ION
+Macromolecule #33: MANGANESE (II) ION
+Macromolecule #34: 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
+Macromolecule #35: DIGALACTOSYL DIACYL GLYCEROL (DGDG)
+Macromolecule #36: PROTOPORPHYRIN IX CONTAINING FE
+Macromolecule #37: Chlorophyll c2
+Macromolecule #38: (1~{R})-3,5,5-trimethyl-4-[(3~{E},5~{E},7~{E},9~{E},11~{E},13~{E}...
+Macromolecule #39: (1~{R})-3,5,5-trimethyl-4-[(3~{E},5~{E},7~{E},9~{E},11~{E},13~{E}...
+Macromolecule #40: water
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | 3D array |
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Sample preparation
| Buffer | pH: 7.5 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI TITAN |
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| Image recording | Film or detector model: DIRECT ELECTRON DE-16 (4k 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: 2.2 µm / Nominal defocus min: 1.2 µm |
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Keywords
Rhodomonas salina (eukaryote)
Authors
China, 1 items
Citation





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Processing
FIELD EMISSION GUN
