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- PDB-8ana: Cryo-EM structure of the proline-rich antimicrobial peptide droso... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8ana | ||||||
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Title | Cryo-EM structure of the proline-rich antimicrobial peptide drosocin bound to the 50S ribosomal subunit | ||||||
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![]() | RIBOSOME / E.coli / Drosocin / Dro1 / antimicrobial peptide / proline-rich / PrAMP / 50S | ||||||
Function / homology | ![]() response to radiation / ribosomal large subunit assembly / large ribosomal subunit / transferase activity / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / tRNA binding / cytoplasmic translation / rRNA binding ...response to radiation / ribosomal large subunit assembly / large ribosomal subunit / transferase activity / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / tRNA binding / cytoplasmic translation / rRNA binding / negative regulation of translation / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / metal ion binding / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.1 Å | ||||||
![]() | Koller, T.O. / Morici, M. / Wilson, D.N. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis for translation inhibition by the glycosylated drosocin peptide. Authors: Timm O Koller / Martino Morici / Max Berger / Haaris A Safdari / Deepti S Lele / Bertrand Beckert / Kanwal J Kaur / Daniel N Wilson / ![]() ![]() ![]() Abstract: The proline-rich antimicrobial peptide (PrAMP) drosocin is produced by Drosophila species to combat bacterial infection. Unlike many PrAMPs, drosocin is O-glycosylated at threonine 11, a post- ...The proline-rich antimicrobial peptide (PrAMP) drosocin is produced by Drosophila species to combat bacterial infection. Unlike many PrAMPs, drosocin is O-glycosylated at threonine 11, a post-translation modification that enhances its antimicrobial activity. Here we demonstrate that the O-glycosylation not only influences cellular uptake of the peptide but also interacts with its intracellular target, the ribosome. Cryogenic electron microscopy structures of glycosylated drosocin on the ribosome at 2.0-2.8-Å resolution reveal that the peptide interferes with translation termination by binding within the polypeptide exit tunnel and trapping RF1 on the ribosome, reminiscent of that reported for the PrAMP apidaecin. The glycosylation of drosocin enables multiple interactions with U2609 of the 23S rRNA, leading to conformational changes that break the canonical base pair with A752. Collectively, our study reveals novel molecular insights into the interaction of O-glycosylated drosocin with the ribosome, which provide a structural basis for future development of this class of antimicrobials. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2.1 MB | Display | ![]() |
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PDB format | ![]() | 1.7 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.5 MB | Display | ![]() |
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Full document | ![]() | 1.5 MB | Display | |
Data in XML | ![]() | 138.7 KB | Display | |
Data in CIF | ![]() | 238.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 15533MC ![]() 8aknC ![]() 8am9C C: citing same article ( M: map data used to model this data |
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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
+50S ribosomal protein ... , 29 types, 29 molecules 01234cdefghijklmnopqrstuvwxyz
-RNA chain , 2 types, 2 molecules ab
#7: RNA chain | Mass: 941463.375 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#8: RNA chain | Mass: 38790.090 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Protein/peptide / Sugars , 2 types, 2 molecules A![](data/chem/img/A2G.gif)
![](data/chem/img/A2G.gif)
#34: Sugar | ChemComp-A2G / |
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#6: Protein/peptide | Mass: 2204.579 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() |
-Non-polymers , 4 types, 261 molecules ![](data/chem/img/ZN.gif)
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![](data/chem/img/SPM.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/SPM.gif)
![](data/chem/img/HOH.gif)
#33: Chemical | #35: Chemical | ChemComp-MG / #36: Chemical | ChemComp-SPM / | #37: 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: Cryo-EM structure of the proline-rich antimicrobial peptide drosocin bound to the 50S ribosomal subunit Type: RIBOSOME / Entity ID: #1-#32 / Source: NATURAL | ||||||||||||||||||||
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Molecular weight | Value: 1.5 MDa / Experimental value: NO | ||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() | ||||||||||||||||||||
Buffer solution | pH: 7.4 | ||||||||||||||||||||
Buffer component |
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Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: 8 OD260/mL | ||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid type: Quantifoil R3/3 | ||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE-PROPANE / Humidity: 100 % / 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 / Nominal defocus max: 900 nm / Nominal defocus min: 400 nm |
Image recording | Electron dose: 40 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 2.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 159749 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement | Resolution: 2.1→2.1 Å / Cor.coef. Fo:Fc: 0.881 / SU B: 4.413 / SU ML: 0.108 / ESU R: 0.117 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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Solvent computation | Solvent model: PARAMETERS FOR MASK CACLULATION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 50.35 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: 1 / Total: 86889 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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