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Open data
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Basic information
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Title | PSI-LHCI of the red alga Cyanidium caldarium RK-1 (NIES-2137) | |||||||||
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![]() | Photosystem I / ELECTRON TRANSPORT / PHOTOSYNTHESIS | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 1.92 Å | |||||||||
![]() | Kato K / Hamaguchi T / Nakajima Y / Kawakami K / Yonekura K / Shen JR / Nagao R | |||||||||
Funding support | 1 items
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![]() | ![]() Title: The structure of PSI-LHCI from provides evolutionary insights into conservation and diversity of red-lineage LHCs. Authors: Koji Kato / Tasuku Hamaguchi / Minoru Kumazawa / Yoshiki Nakajima / Kentaro Ifuku / Shunsuke Hirooka / Yuu Hirose / Shin-Ya Miyagishima / Takehiro Suzuki / Keisuke Kawakami / Naoshi Dohmae / ...Authors: Koji Kato / Tasuku Hamaguchi / Minoru Kumazawa / Yoshiki Nakajima / Kentaro Ifuku / Shunsuke Hirooka / Yuu Hirose / Shin-Ya Miyagishima / Takehiro Suzuki / Keisuke Kawakami / Naoshi Dohmae / Koji Yonekura / Jian-Ren Shen / Ryo Nagao / ![]() Abstract: Light-harvesting complexes (LHCs) are diversified among photosynthetic organisms, and the structure of the photosystem I-LHC (PSI-LHCI) supercomplex has been shown to be variable depending on the ...Light-harvesting complexes (LHCs) are diversified among photosynthetic organisms, and the structure of the photosystem I-LHC (PSI-LHCI) supercomplex has been shown to be variable depending on the species of organisms. However, the structural and evolutionary correlations of red-lineage LHCs are unknown. Here, we determined a 1.92-Å resolution cryoelectron microscopic structure of a PSI-LHCI supercomplex isolated from the red alga RK-1 (NIES-2137), which is an important taxon in the Cyanidiophyceae. We subsequently investigated the correlations of PSI-LHCIs from different organisms through structural comparisons and phylogenetic analysis. The PSI-LHCI structure obtained shows five LHCI subunits surrounding a PSI-monomer core. The five LHCIs are composed of two Lhcr1s, two Lhcr2s, and one Lhcr3. Phylogenetic analysis of LHCs bound to PSI in the red-lineage algae showed clear orthology of LHCs between and , whereas no orthologous relationships were found between Lhcr1-3 and LHCs in other red-lineage PSI-LHCI structures. These findings provide evolutionary insights into conservation and diversity of red-lineage LHCs associated with PSI. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 18 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 35.8 KB 35.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 14 KB | Display | ![]() |
Images | ![]() | 110.9 KB | ||
Filedesc metadata | ![]() | 9.1 KB | ||
Others | ![]() ![]() ![]() | 52.2 MB 59.4 MB 59.4 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
EMDB pages | ![]() ![]() |
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Map
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Voxel size | X=Y=Z: 0.792 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: #1
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Density Histograms |
-Half map: #2
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Density Histograms |
-Half map: #1
File | emd_37480_half_map_2.map | ||||||||||||
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Density Histograms |
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Sample components
+Entire : PSI-LHCI
+Supramolecule #1: PSI-LHCI
+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 II
+Macromolecule #5: Photosystem I reaction center subunit IV
+Macromolecule #6: Photosystem I reaction center subunit III
+Macromolecule #7: Photosystem I reaction center subunit VIII
+Macromolecule #8: Photosystem I reaction center subunit IX
+Macromolecule #9: Photosystem I reaction center subunit X
+Macromolecule #10: Photosystem I reaction center subunit XI
+Macromolecule #11: Photosystem I reaction center subunit XII
+Macromolecule #12: Photosystem I subunit O
+Macromolecule #13: Lhcr1
+Macromolecule #14: Lhcr2
+Macromolecule #15: Lhcr3
+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: DODECYL-BETA-D-MALTOSIDE
+Macromolecule #23: UNKNOWN LIGAND
+Macromolecule #24: DIGALACTOSYL DIACYL GLYCEROL (DGDG)
+Macromolecule #25: (1~{R})-3,5,5-trimethyl-4-[(1~{E},3~{E},5~{E},7~{E},9~{E},11~{E},...
+Macromolecule #26: water
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 2.83 mg/mL | |||||||||
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Buffer | pH: 6.5 Component:
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Grid | Model: Quantifoil R0.6/1 / Mesh: 200 | |||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | JEOL CRYO ARM 300 |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Detector mode: COUNTING / Average electron dose: 39.8 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm |
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Image processing
-Atomic model buiding 1
Initial model | Chain - Source name: Other / Chain - Initial model type: in silico model / Details: homology model |
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Refinement | Space: RECIPROCAL / Protocol: FLEXIBLE FIT |
Output model | ![]() PDB-8wey: |