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Open data
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Basic information
| Entry | Database: PDB / ID: 9tey | ||||||||||||||||||||||||||||||
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| Title | DalDro bound to the terminating Escherichia coli 70S ribosome | ||||||||||||||||||||||||||||||
Components |
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Keywords | ANTIBIOTIC / DalDro / Dal2 / Drosocin / PrAMP / Translation / Inhibitor / Termination / NCPET / Ribosome / Cryo-EM | ||||||||||||||||||||||||||||||
| Function / homology | Function and homology informationpositive regulation of biosynthetic process of antibacterial peptides active against Gram-negative bacteria / defense response to insect / translation release factor activity, codon specific / negative regulation of cytoplasmic translational initiation / transcription antitermination factor activity, RNA binding / ornithine decarboxylase inhibitor activity / misfolded RNA binding / Group I intron splicing / RNA folding / response to bacterium ...positive regulation of biosynthetic process of antibacterial peptides active against Gram-negative bacteria / defense response to insect / translation release factor activity, codon specific / negative regulation of cytoplasmic translational initiation / transcription antitermination factor activity, RNA binding / ornithine decarboxylase inhibitor activity / misfolded RNA binding / Group I intron splicing / RNA folding / response to bacterium / translational termination / transcriptional attenuation / endoribonuclease inhibitor activity / positive regulation of ribosome biogenesis / RNA-binding transcription regulator activity / four-way junction DNA binding / negative regulation of cytoplasmic translation / regulation of mRNA stability / DnaA-L2 complex / translation repressor activity / negative regulation of translational initiation / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / positive regulation of RNA splicing / regulation of DNA-templated transcription elongation / response to reactive oxygen species / transcription elongation factor complex / cytosolic ribosome assembly / ribosome assembly / assembly of large subunit precursor of preribosome / transcription antitermination / DNA endonuclease activity / regulation of cell growth / defense response / translational initiation / DNA-templated transcription termination / response to radiation / maintenance of translational fidelity / mRNA 5'-UTR binding / regulation of translation / large ribosomal subunit / transferase activity / ribosomal small subunit assembly / antibacterial humoral response / ribosome binding / ribosome biogenesis / ribosomal small subunit biogenesis / 5S rRNA binding / ribosomal large subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / defense response to Gram-negative bacterium / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / defense response to bacterium / defense response to Gram-positive bacterium / negative regulation of translation / rRNA binding / structural constituent of ribosome / ribosome / translation / innate immune response / response to antibiotic / negative regulation of DNA-templated transcription / hydrolase activity / mRNA binding / DNA binding / RNA binding / extracellular region / zinc ion binding / membrane / cytosol / cytoplasm Similarity search - Function | ||||||||||||||||||||||||||||||
| Biological species | ![]() | ||||||||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.11 Å | ||||||||||||||||||||||||||||||
Authors | Berger, M.J. / Safdari, H.A. / Wilson, D.N. | ||||||||||||||||||||||||||||||
| Funding support | Germany, 1items
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Citation | Journal: Nat Commun / Year: 2026Title: Flipping antimicrobial peptides in the exit tunnel of the bacterial ribosome. Authors: Weiping Huang / Max J Berger / Haaris A Safdari / Dorota Klepacki / Helge Paternoga / Chetana Baliga / Daniel N Wilson / Nora Vázquez-Laslop / Alexander S Mankin / ![]() Abstract: Proline-rich antimicrobial peptides (PrAMPs) kill bacteria by binding in the ribosomal nascent peptide exit tunnel. Type II PrAMPs bind in an orientation matching that of the nascent protein, trap ...Proline-rich antimicrobial peptides (PrAMPs) kill bacteria by binding in the ribosomal nascent peptide exit tunnel. Type II PrAMPs bind in an orientation matching that of the nascent protein, trap the release factors and arrest ribosomes at stop codons. Conversely, Type I PrAMPs bind in an opposite orientation: their N-terminus invades the peptidyl transferase center arresting translation at start codons. Here, by mining the genome databases, we identify a number of PrAMPs with high sequence similarity to the Type II PrAMP Drosocin. Notably, many of the new PrAMPs do not stall ribosomes at stop codons, but act as Type I PrAMPs arresting translation at start codons. Structural analysis shows that such peptides bind with a Type I orientation. Minimal alterations in the peptide structure can flip the orientation of the PrAMP in the exit tunnel, switching the mechanism of translation inhibition. Altering the mode of binding and action of a PrAMP by only few mutations could be exploited by the host to combat newly emerging bacterial pathogens. | ||||||||||||||||||||||||||||||
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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 | 9tey.cif.gz | 3.6 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9tey.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 9tey.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/te/9tey ftp://data.pdbj.org/pub/pdb/validation_reports/te/9tey | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 55847MC ![]() 9tewC ![]() 9texC ![]() 9tezC 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
+Large ribosomal subunit protein ... , 27 types, 27 molecules 0123cdefghijlmnopqrstvwxyz4
-30S ribosomal protein ... , 5 types, 5 molecules BFGPT
| #6: Protein | Mass: 26781.670 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #10: Protein | Mass: 15727.512 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #11: Protein | Mass: 20055.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #20: Protein | Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #24: Protein | Mass: 9708.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Small ribosomal subunit protein ... , 15 types, 15 molecules CDEHIJKLMNOQRSU
| #7: Protein | Mass: 26031.316 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #8: Protein | Mass: 23514.199 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #9: Protein | Mass: 17629.398 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #12: Protein | Mass: 14146.557 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #13: Protein | Mass: 14886.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #14: Protein | Mass: 11755.597 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #15: Protein | Mass: 13871.959 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #16: Protein | Mass: 13814.249 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #17: Protein | Mass: 13128.467 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #18: Protein | Mass: 11606.560 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #19: Protein | Mass: 10290.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #21: Protein | Mass: 9724.491 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #22: Protein | Mass: 9005.472 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #23: Protein | Mass: 10455.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #25: Protein | Mass: 8524.039 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-RNA chain , 4 types, 5 molecules ZbYVA
| #27: RNA chain | Mass: 24485.539 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() | ||||
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| #28: RNA chain | Mass: 38790.090 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #54: RNA chain | | Mass: 941811.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() #55: RNA chain | | Mass: 499873.406 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-50S ribosomal protein ... , 2 types, 2 molecules ku
| #37: Protein | Mass: 15008.471 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #47: Protein | Mass: 10713.465 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Protein/peptide / Protein , 2 types, 2 molecules 8W
| #26: Protein | Mass: 40573.309 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #5: Protein/peptide | Mass: 2326.700 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Non-polymers , 3 types, 9 molecules 




| #56: Chemical | | #57: Chemical | ChemComp-SPM / | #58: Water | ChemComp-HOH / | |
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-Details
| Has ligand of interest | N |
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| Has protein modification | Y |
-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: DalDro bound to the terminating 70S E. coli ribosome / Type: RIBOSOME Entity ID: #53-#55, #4, #15-#16, #30, #38, #46-#52, #1-#3, #28, #6-#10, #12-#14, #17-#25, #29, #31-#37, #39-#45, #26, #11, #5, #27 Source: NATURAL |
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| Molecular weight | Experimental value: NO |
| Source (natural) | Organism: ![]() |
| Buffer solution | pH: 7.4 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Vitrification | Cryogen name: ETHANE-PROPANE |
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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: 900 nm / Nominal defocus min: 300 nm |
| Image recording | Electron dose: 1.14 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.11 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 70345 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refinement | Resolution: 3.11→3.11 Å / Cor.coef. Fo:Fc: 0.937 / WRfactor Rwork: 0.297 / SU B: 18.706 / SU ML: 0.299 / Average fsc free: 0 / Average fsc overall: 0.829 / Average fsc work: 0.829 / ESU R: 0.388 Details: Hydrogens have been added in their riding positions
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| Solvent computation | Solvent model: NONE | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 92.251 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refine LS restraints |
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