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Open data
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Basic information
Entry | Database: PDB / ID: 7nww | ||||||||||||
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Title | CspA-27 cotranslational folding intermediate 1 | ||||||||||||
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Function / homology | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() ![]() | ||||||||||||
Method | ![]() ![]() ![]() | ||||||||||||
![]() | Agirrezabala, X. / Samatova, E. / Macher, M. / Liutkute, M. / Gil-Carton, D. / Novacek, J. / Valle, M. / Rodnina, M.V. | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: A switch from α-helical to β-strand conformation during co-translational protein folding. Authors: Xabier Agirrezabala / Ekaterina Samatova / Meline Macher / Marija Liutkute / Manisankar Maiti / David Gil-Carton / Jiri Novacek / Mikel Valle / Marina V Rodnina / ![]() ![]() ![]() Abstract: Cellular proteins begin to fold as they emerge from the ribosome. The folding landscape of nascent chains is not only shaped by their amino acid sequence but also by the interactions with the ...Cellular proteins begin to fold as they emerge from the ribosome. The folding landscape of nascent chains is not only shaped by their amino acid sequence but also by the interactions with the ribosome. Here, we combine biophysical methods with cryo-EM structure determination to show that folding of a β-barrel protein begins with formation of a dynamic α-helix inside the ribosome. As the growing peptide reaches the end of the tunnel, the N-terminal part of the nascent chain refolds to a β-hairpin structure that remains dynamic until its release from the ribosome. Contacts with the ribosome and structure of the peptidyl transferase center depend on nascent chain conformation. These results indicate that proteins may start out as α-helices inside the tunnel and switch into their native folds only as they emerge from the ribosome. Moreover, the correlation of nascent chain conformations with reorientation of key residues of the ribosomal peptidyl-transferase center suggest that protein folding could modulate ribosome activity. | ||||||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 3.2 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 12636MC ![]() 7oifC ![]() 7oigC ![]() 7oiiC ![]() 7ot5C M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
-RNA chain , 5 types, 5 molecules 1234z
#1: RNA chain | ![]() Mass: 941526.438 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
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#2: RNA chain | ![]() Mass: 497404.969 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
#3: RNA chain | ![]() Mass: 38790.090 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
#4: RNA chain | ![]() Mass: 1868.150 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#54: RNA chain | Mass: 28464.949 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
+50S ribosomal protein ... , 29 types, 29 molecules CDEFGHIJKLMNOPQRSTUVWXYZabcde
-30S ribosomal protein ... , 20 types, 20 molecules fghijklmnopqrstuvwxy
#34: Protein | ![]() Mass: 25072.867 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
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#35: Protein | ![]() Mass: 23248.994 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#36: Protein | ![]() Mass: 23383.002 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#37: Protein | ![]() Mass: 16475.037 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#38: Protein | ![]() Mass: 12125.993 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#39: Protein | ![]() Mass: 16861.523 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#40: Protein | ![]() Mass: 14015.361 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#41: Protein | ![]() Mass: 14554.882 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#42: Protein | ![]() Mass: 11254.041 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#43: Protein | ![]() Mass: 12487.200 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#44: Protein | ![]() Mass: 13683.053 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#45: Protein | ![]() Mass: 12868.091 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#46: Protein | ![]() Mass: 11475.364 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#47: Protein | ![]() Mass: 10159.621 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#48: Protein | ![]() Mass: 9207.572 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#49: Protein | ![]() Mass: 9263.946 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#50: Protein | ![]() Mass: 7734.896 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#51: Protein | ![]() Mass: 9421.018 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#52: Protein | ![]() Mass: 9577.268 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#53: Protein | ![]() Mass: 8392.844 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
-Protein/peptide , 1 types, 1 molecules B
#55: Protein/peptide | Mass: 2938.314 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
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-Non-polymers , 2 types, 415 molecules ![](data/chem/img/MG.gif)
![](data/chem/img/ZN.gif)
![](data/chem/img/ZN.gif)
#56: Chemical | ChemComp-MG / #57: Chemical | |
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-Details
Has ligand of interest | N |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
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Sample preparation
Component | Name: 70S-CspA27-1 / Type: RIBOSOME / Entity ID: #1-#55 / Source: RECOMBINANT |
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Molecular weight | Value: 2.5 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() ![]() |
Buffer solution | pH: 7.5 Details: 50 mM Tris-HCl, 70 mM NH4Cl, 30 mM KCl, 3.5 mM MgCl2, 8 mM putrescine, 0.5 mM spermidine, 1 mM DTT, 1 mM GTP, pH 7.5 |
Specimen | Conc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() |
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/1 |
Vitrification![]() | Instrument: FEI VITROBOT MARK I / Cryogen name: ETHANE / Humidity: 99 % / Chamber temperature: 278 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![]() ![]() |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 2.2 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON III (4k x 4k) |
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Processing
EM software |
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CTF correction![]() | Type: NONE | ||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry![]() | ||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction![]() | Resolution: 3.05 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 35573 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: OTHER / Space: REAL Details: The software LocScale for model-based local density sharpening was used as implemented in the CCP-EM suite, version 1.3.0 | ||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 6ORE Accession code: 6ORE / Source name: PDB / Type: experimental model |