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- EMDB-63167: Cryo-EM structure of Lhcb4.1-C2S2 PSII-LHCII supercomplex from Ar... -
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Open data
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Basic information
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Title | Cryo-EM structure of Lhcb4.1-C2S2 PSII-LHCII supercomplex from Arabidopsis thaliana | ||||||||||||
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![]() | Photosystem II / light harvesting / photoacclimation / stress-induced antennae / cryo-EM / PHOTOSYNTHESIS | ||||||||||||
Function / homology | ![]() photosynthesis, light harvesting in photosystem II / photosystem II antenna complex / PSII associated light-harvesting complex II / response to desiccation / photoinhibition / nonphotochemical quenching / cellular response to abscisic acid stimulus / cellular response to water deprivation / response to red light / plastid thylakoid membrane ...photosynthesis, light harvesting in photosystem II / photosystem II antenna complex / PSII associated light-harvesting complex II / response to desiccation / photoinhibition / nonphotochemical quenching / cellular response to abscisic acid stimulus / cellular response to water deprivation / response to red light / plastid thylakoid membrane / chloroplast stromal thylakoid / response to low light intensity stimulus / thylakoid lumen / plastoglobule / regulation of stomatal closure / response to high light intensity / thylakoid membrane / response to far red light / chloroplast thylakoid / photosynthesis, light harvesting in photosystem I / vacuolar transport / thylakoid / photosynthesis, light harvesting / chloroplast thylakoid lumen / apoplast / photosystem II oxygen evolving complex / photosystem II assembly / response to fructose / oxygen evolving activity / photosystem II stabilization / photosystem II reaction center / chloroplast envelope / photosystem II / plant-type vacuole / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / photosystem I / photosynthetic electron transport chain / photosystem II / response to herbicide / poly(U) RNA binding / plastid / chloroplast stroma / chlorophyll binding / photosynthetic electron transport in photosystem II / photosynthesis, light reaction / chloroplast thylakoid membrane / phosphate ion binding / positive regulation of reactive oxygen species biosynthetic process / : / response to light stimulus / photosynthesis / response to cold / chloroplast / electron transfer activity / protein stabilization / iron ion binding / protein domain specific binding / mRNA binding / heme binding / mitochondrion / metal ion binding / nucleus / plasma membrane / cytosol Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | ||||||||||||
![]() | Zhou Q / Caferri R / Shan JY / Amelii A / Bassi R / Liu ZF | ||||||||||||
Funding support | European Union, ![]()
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![]() | ![]() Title: A stress-induced paralog of Lhcb4 controls the photosystem II functional architecture in Arabidopsis thaliana. Authors: Roberto Caferri / Qian Zhou / Luca Dall'Osto / Antonello Amelii / Jianyu Shan / Zhenfeng Liu / Roberto Bassi / ![]() ![]() Abstract: Photosystem II (PSII) is the pigment-protein complex catalysing light-induced water oxidation. In Arabidopsis thaliana, it includes three Lhcb4-6 proteins linking the core complex to peripheral ...Photosystem II (PSII) is the pigment-protein complex catalysing light-induced water oxidation. In Arabidopsis thaliana, it includes three Lhcb4-6 proteins linking the core complex to peripheral trimeric antennae. While Lhcb5 and Lhcb6 are encoded by single genes, Lhcb4 is encoded by three isoforms: Lhcb4.1 and Lhcb4.2, constitutively expressed, and Lhcb4.3 (Lhcb8), which accumulates under prolonged abiotic stress. Lhcb8 substitutes for Lhcb4, preventing Lhcb6 accumulation and resulting in a smaller PSII with high quantum yield. Cryo-electron microscopy reveals that Lhcb8 has a shorter carboxy-terminal domain, lacks two chlorophylls, and interacts more tightly with the PSII core, inducing structural changes in the PSII antenna system, ultimately inhibiting the formation of PSII arrays and favouring plastoquinone diffusion. We suggest that dynamic Lhcb4 vs Lhcb8 expression allows for PSII acclimation to contrasting light conditions, offering the potential for engineering crops with improved light use efficiency. | ||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 220.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 42.6 KB 42.6 KB | Display Display | ![]() |
Images | ![]() | 117.1 KB | ||
Filedesc metadata | ![]() | 10.5 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 560.5 KB | Display | ![]() |
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Full document | ![]() | 560.1 KB | Display | |
Data in XML | ![]() | 7.4 KB | Display | |
Data in CIF | ![]() | 8.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9lk4MC ![]() 9lk5C M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.06 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 : Cryo-EM structure of the Lhcb8-C2S2 PSII-LHCII supercomplex from ...
+Supramolecule #1: Cryo-EM structure of the Lhcb8-C2S2 PSII-LHCII supercomplex from ...
+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: Chlorophyll a-b binding protein 2, chloroplastic
+Macromolecule #8: Photosystem II reaction center protein H
+Macromolecule #9: Photosystem II reaction center protein I
+Macromolecule #10: Photosystem II reaction center protein J
+Macromolecule #11: Photosystem II reaction center protein K
+Macromolecule #12: Photosystem II reaction center protein L
+Macromolecule #13: Photosystem II reaction center protein M
+Macromolecule #14: Oxygen-evolving enhancer protein 1-1, chloroplastic
+Macromolecule #15: Chlorophyll a-b binding protein CP29.1, chloroplastic
+Macromolecule #16: Photosystem II reaction center protein T
+Macromolecule #17: Photosystem II 5 kDa protein, chloroplastic
+Macromolecule #18: Photosystem II reaction center W protein, chloroplastic
+Macromolecule #19: (thale cress) hypothetical protein
+Macromolecule #20: Chlorophyll a-b binding protein 2.2, chloroplastic
+Macromolecule #21: Photosystem II reaction center protein Z
+Macromolecule #22: Chlorophyll a-b binding protein CP26, chloroplastic
+Macromolecule #23: CHLOROPHYLL A
+Macromolecule #24: PHEOPHYTIN A
+Macromolecule #25: BETA-CAROTENE
+Macromolecule #26: 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL
+Macromolecule #27: 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
+Macromolecule #28: DIGALACTOSYL DIACYL GLYCEROL (DGDG)
+Macromolecule #29: FE (II) ION
+Macromolecule #30: 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE
+Macromolecule #31: BICARBONATE ION
+Macromolecule #32: 2,3-DIMETHYL-5-(3,7,11,15,19,23,27,31,35-NONAMETHYL-2,6,10,14,18,...
+Macromolecule #33: PROTOPORPHYRIN IX CONTAINING FE
+Macromolecule #34: CHLOROPHYLL B
+Macromolecule #35: (3R,3'R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL
+Macromolecule #36: (1R,3R)-6-{(3E,5E,7E,9E,11E,13E,15E,17E)-18-[(1S,4R,6R)-4-HYDROXY...
+Macromolecule #37: (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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![]() | single particle reconstruction |
Aggregation state | particle |
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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 | TFS 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: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |