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Yorodumi- PDB-9fs6: Cryo-EM structure of Saccharolobus solfataricus 30S initiation co... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 9fs6 | ||||||
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| Title | Cryo-EM structure of Saccharolobus solfataricus 30S initiation complex bound to Ss-aIF2beta leaderless mRNA with h44 in up position | ||||||
Components |
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Keywords | TRANSLATION / 30S / ribosome / initiation / Saccharolobus solfataricus / leaderless mRNA | ||||||
| Function / homology | Function and homology informationribonuclease P activity / tRNA 5'-leader removal / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / ribosome biogenesis / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit ...ribonuclease P activity / tRNA 5'-leader removal / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / ribosome biogenesis / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytoplasmic translation / tRNA binding / rRNA binding / structural constituent of ribosome / ribosome / translation / ribonucleoprotein complex / mRNA binding / RNA binding / zinc ion binding / cytoplasm / cytosol Similarity search - Function | ||||||
| Biological species | ![]() ![]() Saccharolobus solfataricus P2 (archaea) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å | ||||||
Authors | Bourgeois, G. / Coureux, P.D. / Mechulam, Y. / Schmitt, E. | ||||||
| Funding support | France, 1items
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Citation | Journal: Nat Commun / Year: 2025Title: Structures of Saccharolobus solfataricus initiation complexes with leaderless mRNAs highlight archaeal features and eukaryotic proximity. Authors: Gabrielle Bourgeois / Pierre-Damien Coureux / Christine Lazennec-Schurdevin / Clément Madru / Thomas Gaillard / Magalie Duchateau / Julia Chamot-Rooke / Sophie Bourcier / Yves Mechulam / Emmanuelle Schmitt / ![]() Abstract: The archaeal ribosome is of the eukaryotic type. TACK and Asgard superphyla, the closest relatives of eukaryotes, have ribosomes containing eukaryotic ribosomal proteins not found in other archaea, ...The archaeal ribosome is of the eukaryotic type. TACK and Asgard superphyla, the closest relatives of eukaryotes, have ribosomes containing eukaryotic ribosomal proteins not found in other archaea, eS25, eS26 and eS30. Here, we investigate the case of Saccharolobus solfataricus, a TACK crenarchaeon, using mainly leaderless mRNAs. We characterize the small ribosomal subunit of S. solfataricus bound to SD-leadered or leaderless mRNAs. Cryo-EM structures show eS25, eS26 and eS30 bound to the small subunit. We identify two ribosomal proteins, aS33 and aS34, and an additional domain of eS6. Leaderless mRNAs are bound to the small subunit with contribution of their 5'-triphosphate group. Archaeal eS26 binds to the mRNA exit channel wrapped around the 3' end of rRNA, as in eukaryotes. Its position is not compatible with an SD:antiSD duplex. Our results suggest a positive role of eS26 in leaderless mRNAs translation and possible evolutionary routes from archaeal to eukaryotic translation. | ||||||
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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 | 9fs6.cif.gz | 1.6 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9fs6.ent.gz | 1.3 MB | Display | PDB format |
| PDBx/mmJSON format | 9fs6.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 9fs6_validation.pdf.gz | 1.7 MB | Display | wwPDB validaton report |
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| Full document | 9fs6_full_validation.pdf.gz | 1.8 MB | Display | |
| Data in XML | 9fs6_validation.xml.gz | 141.2 KB | Display | |
| Data in CIF | 9fs6_validation.cif.gz | 233.8 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/fs/9fs6 ftp://data.pdbj.org/pub/pdb/validation_reports/fs/9fs6 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 50724MC ![]() 9fhlC ![]() 9fraC ![]() 9frkC ![]() 9frlC ![]() 9fs8C ![]() 9fsfC ![]() 9fy0C C: citing same article ( M: map data used to model this data |
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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
-RNA chain , 3 types, 3 molecules 245
| #1: RNA chain | Mass: 486417.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() Saccharolobus solfataricus P2 (archaea) / References: GenBank: AE006641.1 |
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| #30: RNA chain | Mass: 24833.904 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
| #34: RNA chain | Mass: 4518.780 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() Saccharolobus solfataricus P2 (archaea) |
+Small ribosomal subunit protein ... , 26 types, 26 molecules ABDEFGHIJKLNOQRSTUVWXYZcPM
-Protein , 4 types, 4 molecules C3da
| #4: Protein | Mass: 7352.656 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() Saccharolobus solfataricus P2 (archaea) / References: UniProt: Q980V0 |
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| #26: Protein | Mass: 13757.939 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() Saccharolobus solfataricus P2 (archaea) / References: UniProt: P55858 |
| #28: Protein | Mass: 8392.802 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() Saccharolobus solfataricus P2 (archaea) / References: UniProt: D0KTI0 |
| #31: Protein | Mass: 8210.800 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() Saccharolobus solfataricus P2 (archaea) / References: UniProt: Q97ZK4 |
-LSU ribosomal protein ... , 2 types, 2 molecules eb
| #29: Protein | Mass: 6064.125 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() Saccharolobus solfataricus P2 (archaea) / References: UniProt: Q97ZH4 |
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| #33: Protein | Mass: 10695.640 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() Saccharolobus solfataricus P2 (archaea) / References: UniProt: Q97ZR1 |
-Non-polymers , 5 types, 305 molecules 








| #36: Chemical | ChemComp-SPM / #37: Chemical | ChemComp-MG / #38: Chemical | ChemComp-ZN / #39: Chemical | ChemComp-GTP / | #40: 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
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| Buffer solution | pH: 6.7 | ||||||||||||||||||||||||||||||
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||
| 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: 2500 nm / Nominal defocus min: 800 nm |
| Image recording | Electron dose: 40 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: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 49401 / Symmetry type: POINT | ||||||||||||||||||||||||
| Refine LS restraints |
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Saccharolobus solfataricus P2 (archaea)
France, 1items
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FIELD EMISSION GUN