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Open data
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Basic information
| Entry | Database: PDB / ID: 9i5t | ||||||
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| Title | 50S subunit of P. gingivalis ribosome with Lefamulin | ||||||
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Keywords | RIBOSOME / antibiotics / macrolide-resistance | ||||||
| Function / homology | Function and homology informationlarge ribosomal subunit / transferase activity / 5S rRNA binding / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding ...large ribosomal subunit / transferase activity / 5S rRNA binding / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / structural constituent of ribosome / ribosome / translation / ribonucleoprotein complex / mRNA binding / cytoplasm Similarity search - Function | ||||||
| Biological species | Porphyromonas gingivalis (bacteria) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.6 Å | ||||||
Authors | Hiregange, D.G. / Bashan, A. / Yonath, A. | ||||||
| Funding support | 1items
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Citation | Journal: Nucleic Acids Res / Year: 2025Title: Structural studies of ribosome from an anaerobic Bacteroidetes human pathogen Porphyromonas gingivalis. Authors: Disha-Gajanan Hiregange / Sarit Samiya / Danuta Mizgalska / Efrat Ben-Zeev / Miriam Waghalter / Andre Rivalta / K Shanmugha Rajan / Yehuda Halfon / Elinor Breiner-Goldstein / Igor ...Authors: Disha-Gajanan Hiregange / Sarit Samiya / Danuta Mizgalska / Efrat Ben-Zeev / Miriam Waghalter / Andre Rivalta / K Shanmugha Rajan / Yehuda Halfon / Elinor Breiner-Goldstein / Igor Kaczmarczyk / Aneta Sroka / Masato Taoka / Yuko Nobe / Toshiaki Isobe / Susanne Paukner / Ella Zimmerman / Anat Bashan / Jan Potempa / Ada Yonath / ![]() Abstract: Porphyromonas gingivalis, an anaerobic pathogen in chronic periodontitis, belongs to the Bacteroidota phylum and is associated with various virulence factors. Its antibiotic-resistant strains and its ...Porphyromonas gingivalis, an anaerobic pathogen in chronic periodontitis, belongs to the Bacteroidota phylum and is associated with various virulence factors. Its antibiotic-resistant strains and its propensity to form biofilms pose a challenge to effective treatment. To explore therapeutic avenues, we studied the high-resolution cryogenic electron microscope structures of ribosomes from the wild-type P. gingivalis W83 and the macrolide-resistant mutant strain ermΔporN. The structural analysis revealed unique features primarily at the ribosome periphery. Together with the distinctive distribution of ribosomal RNA modifications, these findings offer insights into the therapeutical potential, such as creation of novel therapeutic compounds inhibiting the specific cellular functions of the P. gingivalis ribosomes. Moreover, the high-resolution structure of the ermΔporN ribosome in its complex with the approved antibiotic lefamulin suggests its repurposing against P. gingivalis. Furthermore, we provide a foundation for additional effective strategies to treat periodontitis and associated systemic diseases. | ||||||
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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 | 9i5t.cif.gz | 2.1 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9i5t.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 9i5t.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/i5/9i5t ftp://data.pdbj.org/pub/pdb/validation_reports/i5/9i5t | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 52635MC ![]() 9i5vC ![]() 9i5xC 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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Components
+Large ribosomal subunit protein ... , 29 types, 29 molecules 01111224678DEFMOPQRSTUVWXYZh13N5
-RNA chain , 2 types, 2 molecules AB
| #10: RNA chain | Mass: 934217.688 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Porphyromonas gingivalis (bacteria) |
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| #11: RNA chain | Mass: 35186.926 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Porphyromonas gingivalis (bacteria) |
-Protein/peptide , 1 types, 1 molecules 15
| #29: Protein/peptide | Mass: 5559.542 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Porphyromonas gingivalis (bacteria) / References: UniProt: A0AAE9XCN0 |
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-Non-polymers , 6 types, 1554 molecules 










| #33: Chemical | ChemComp-MG / #34: Chemical | ChemComp-ZN / | #35: Chemical | ChemComp-62B / | #36: Chemical | ChemComp-K / #37: Chemical | ChemComp-NA / #38: Water | ChemComp-HOH / | |
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-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: 50S subunit of P. gingivalis ribosome with Lefamulin / Type: RIBOSOME / Entity ID: #1-#10, #12-#32 / Source: NATURAL |
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| Molecular weight | Experimental value: NO |
| Source (natural) | Organism: Porphyromonas gingivalis (bacteria) |
| Buffer solution | pH: 7.5 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2 |
| Vitrification | Cryogen name: ETHANE |
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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: 1500 nm / Nominal defocus min: 500 nm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Electron dose: 1 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
| EM software | Name: PHENIX / Version: 1.20.1_4487: / Category: model refinement | ||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 2.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 223396 / Symmetry type: POINT | ||||||||||||||||||||||||
| Refine LS restraints |
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Porphyromonas gingivalis (bacteria)
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