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- PDB-7z6q: Cryo-EM structure of the whole photosynthetic complex from the gr... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7z6q | ||||||
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Title | Cryo-EM structure of the whole photosynthetic complex from the green sulfur bacteria | ||||||
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![]() | PHOTOSYNTHESIS / reaction centre / electron transport / energy transfer / green sulfur bacterium / membrane protein / light-harvesting protein complex | ||||||
Function / homology | ![]() thylakoid / bacteriochlorophyll binding / iron-sulfur cluster binding / photosynthesis / electron transfer activity / heme binding / membrane / metal ion binding / plasma membrane Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.5 Å | ||||||
![]() | Xie, H. / Tsiotis, G. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM structure of the whole photosynthetic reaction center apparatus from the green sulfur bacterium . Authors: Hao Xie / Alexandros Lyratzakis / Radhika Khera / Myrto Koutantou / Sonja Welsch / Hartmut Michel / Georgios Tsiotis / ![]() ![]() Abstract: Light energy absorption and transfer are very important processes in photosynthesis. In green sulfur bacteria light is absorbed primarily by the chlorosomes and its energy is transferred via the ...Light energy absorption and transfer are very important processes in photosynthesis. In green sulfur bacteria light is absorbed primarily by the chlorosomes and its energy is transferred via the Fenna-Matthews-Olson (FMO) proteins to a homodimeric reaction center (RC). Here, we report the cryogenic electron microscopic structure of the intact FMO-RC apparatus from at 2.5 Å resolution. The FMO-RC apparatus presents an asymmetric architecture and contains two FMO trimers that show different interaction patterns with the RC core. Furthermore, the two permanently bound transmembrane subunits PscC, which donate electrons to the special pair, interact only with the two large PscA subunits. This structure fills an important gap in our understanding of the transfer of energy from antenna to the electron transport chain of this RC and the transfer of electrons from reduced sulfur compounds to the special pair. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 784.6 KB | Display | ![]() |
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PDB format | ![]() | 689.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 14528MC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Photosystem P840 reaction ... , 2 types, 3 molecules AaB
#1: Protein | Mass: 81784.641 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #2: Protein | | Mass: 23540.289 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Protein , 2 types, 3 molecules CcD
#3: Protein | Mass: 22741.779 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #4: Protein | | Mass: 16633.195 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Bacteriochlorophyll ... , 1 types, 6 molecules EFGHIJ
#5: Protein | Mass: 40343.430 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Non-polymers , 9 types, 101 molecules ![](data/chem/img/GS0.gif)
![](data/chem/img/CLA.gif)
![](data/chem/img/BCL.gif)
![](data/chem/img/F39.gif)
![](data/chem/img/LHG.gif)
![](data/chem/img/IKV.gif)
![](data/chem/img/CA.gif)
![](data/chem/img/SF4.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/CLA.gif)
![](data/chem/img/BCL.gif)
![](data/chem/img/F39.gif)
![](data/chem/img/LHG.gif)
![](data/chem/img/IKV.gif)
![](data/chem/img/CA.gif)
![](data/chem/img/SF4.gif)
![](data/chem/img/HOH.gif)
#6: Chemical | #7: Chemical | ChemComp-CLA / #8: Chemical | ChemComp-BCL / #9: Chemical | #10: Chemical | ChemComp-LHG / #11: Chemical | #12: Chemical | #13: Chemical | #14: Water | ChemComp-HOH / | |
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-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Photosystem P840 reaction center / Type: COMPLEX / Entity ID: #1-#5 / Source: NATURAL |
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Molecular weight | Value: 0.49 MDa / Experimental value: YES |
Source (natural) | Organism: ![]() |
Buffer solution | pH: 8 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 4 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 1200 nm / Calibrated defocus min: 1200 nm / Calibrated defocus max: 2500 nm / Cs: 2.7 mm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 45 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
Image scans | Width: 4092 / Height: 5769 |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Particle selection | Num. of particles selected: 4791019 | ||||||||||||||||||||||||
3D reconstruction | Resolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 481095 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | B value: 60 | ||||||||||||||||||||||||
Atomic model building |
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