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Yorodumi- PDB-9h91: Cryo-EM structure of the Vibrio natrigens 50S ribosomal subunit i... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 9h91 | |||||||||
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| Title | Cryo-EM structure of the Vibrio natrigens 50S ribosomal subunit in complex with the proline-rich antimicrobial peptide Bac5(1-17). | |||||||||
Components |
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Keywords | RIBOSOME / Vibrio natriegens / Bac5 / Bactenecin 5 / 50S / V. natriegens | |||||||||
| Function / homology | Function and homology informationassembly of large subunit precursor of preribosome / lipopolysaccharide binding / antimicrobial humoral immune response mediated by antimicrobial peptide / large ribosomal subunit / ribosome binding / transferase activity / 5S rRNA binding / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / defense response to Gram-negative bacterium ...assembly of large subunit precursor of preribosome / lipopolysaccharide binding / antimicrobial humoral immune response mediated by antimicrobial peptide / large ribosomal subunit / ribosome binding / transferase activity / 5S rRNA binding / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / defense response to Gram-negative bacterium / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / defense response to Gram-positive bacterium / rRNA binding / structural constituent of ribosome / ribosome / translation / ribonucleoprotein complex / innate immune response / mRNA binding / extracellular space / cytoplasm Similarity search - Function | |||||||||
| Biological species | Vibrio natriegens (bacteria)![]() | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.7 Å | |||||||||
Authors | Raulf, K.F. / Koller, T.O. / Beckert, B. / Morici, M. / Lepak, A. / Bange, G. / Wilson, D.N. | |||||||||
| Funding support | Germany, 2items
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Citation | Journal: Nucleic Acids Res / Year: 2025Title: The structure of the Vibrio natriegens 70S ribosome in complex with the proline-rich antimicrobial peptide Bac5(1-17). Authors: Karoline Raulf / Timm O Koller / Bertrand Beckert / Alexander Lepak / Martino Morici / Mario Mardirossian / Marco Scocchi / Gert Bange / Daniel N Wilson / ![]() Abstract: Proline-rich antimicrobial peptides (PrAMPs) are produced as part of the innate immune response of animals, insects, and plants. The well-characterized mammalian PrAMP bactenecin-5 (Bac5) has been ...Proline-rich antimicrobial peptides (PrAMPs) are produced as part of the innate immune response of animals, insects, and plants. The well-characterized mammalian PrAMP bactenecin-5 (Bac5) has been shown to help fight bacterial infection by binding to the bacterial ribosome and inhibiting protein synthesis. In the absence of Bac5-ribosome structures, the binding mode of Bac5 and exact mechanism of action has remained unclear. Here, we present a cryo-electron microscopy structure of Bac5 in complex with the 70S ribosome from the Gram-negative marine bacterium Vibrio natriegens. The structure shows that, despite sequence similarity to Bac7 and other type I PrAMPs, Bac5 displays a completely distinct mode of interaction with the ribosomal exit tunnel. Bac5 overlaps with the binding site of both A- and P-site transfer RNAs bound at the peptidyltransferase center, suggesting that this type I PrAMP can interfere with late stages of translation initiation as well as early stages of elongation. Collectively, our study presents a ribosome structure from V. natriegens, a fast-growing bacterium that has interesting biotechnological and synthetic biology applications, as well as providing additional insights into the diverse binding modes that type I PrAMPs can utilize to inhibit protein synthesis. | |||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 9h91.cif.gz | 2.1 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9h91.ent.gz | 1.6 MB | Display | PDB format |
| PDBx/mmJSON format | 9h91.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 9h91_validation.pdf.gz | 1.3 MB | Display | wwPDB validaton report |
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| Full document | 9h91_full_validation.pdf.gz | 1.4 MB | Display | |
| Data in XML | 9h91_validation.xml.gz | 132.4 KB | Display | |
| Data in CIF | 9h91_validation.cif.gz | 231.3 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/h9/9h91 ftp://data.pdbj.org/pub/pdb/validation_reports/h9/9h91 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 51947MC ![]() 9h90C M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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| 1 |
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Components
+50S ribosomal protein ... , 26 types, 26 molecules 01234CDEGJKLMNOPQRSTUVWXYZ
-RNA chain , 2 types, 2 molecules BA
| #7: RNA chain | Mass: 38990.160 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Vibrio natriegens (bacteria) |
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| #30: RNA chain | Mass: 881521.312 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Vibrio natriegens (bacteria) |
-Protein/peptide / Protein , 2 types, 2 molecules 9H
| #12: Protein | Mass: 15769.948 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Vibrio natriegens (bacteria) / References: UniProt: A0AAN0Y4G6 |
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| #6: Protein/peptide | Mass: 2167.625 Da / Num. of mol.: 1 / Source method: obtained synthetically / Details: Bactenecin-5 (1-17) / Source: (synth.) ![]() |
-Non-polymers , 2 types, 19 molecules 


| #31: Chemical | ChemComp-ZN / |
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| #32: Water | ChemComp-HOH / |
-Details
| Has ligand of interest | N |
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| Has protein modification | N |
-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: Structure of the Proline-rich Antimicrobial Peptide Bac5(1-17) in Complex with the Vibrio natriegens 50S ribosomal subunit Type: RIBOSOME / Entity ID: #1-#30 / Source: NATURAL | ||||||||||||||||||||||||||||||||||||||||
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| Molecular weight | Experimental value: NO | ||||||||||||||||||||||||||||||||||||||||
| Source (natural) | Organism: Vibrio natriegens (bacteria) | ||||||||||||||||||||||||||||||||||||||||
| Buffer solution | pH: 7.5 | ||||||||||||||||||||||||||||||||||||||||
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| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: 8 OD/ml ribosome concentration | ||||||||||||||||||||||||||||||||||||||||
| Vitrification | Cryogen name: ETHANE-PROPANE / Humidity: 100 % / Chamber temperature: 277 K |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: TFS KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 1200 nm / Nominal defocus min: 700 nm |
| Image recording | Electron dose: 1 e/Å2 / Detector mode: COUNTING / Film or detector model: FEI FALCON II (4k x 4k) |
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Processing
| EM software | Name: REFMAC / Version: 5.8.0425 / Category: model refinement | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 2.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 294068 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | Protocol: RIGID BODY FIT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refinement | Resolution: 2.7→224.93 Å / Cor.coef. Fo:Fc: 0.958 / SU B: 5.145 / SU ML: 0.103 / ESU R: 0.198 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT
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| Solvent computation | Solvent model: PARAMETERS FOR MASK CACLULATION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 93.352 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refinement step | Cycle: 1 / Total: 83761 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refine LS restraints |
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Vibrio natriegens (bacteria)

Germany, 2items
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FIELD EMISSION GUN