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Yorodumi- EMDB-50445: High-resolution cryo-EM structure of Saccharolobus solfataricus 3... -
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Open data
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Basic information
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| Title | High-resolution cryo-EM structure of Saccharolobus solfataricus 30S ribosomal subunit bound to mRNA and initiator tRNA | |||||||||
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Keywords | 30S / ribosome / Translation / Saccharolobus solfataricus | |||||||||
| 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 | single particle reconstruction / cryo EM / Resolution: 2.5 Å | |||||||||
Authors | Bourgeois G / Coureux PD / Mechulam Y / Schmitt E | |||||||||
| Funding support | France, 1 items
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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
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Downloads & links
-EMDB archive
| Map data | emd_50445.map.gz | 295.1 MB | EMDB map data format | |
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| Header (meta data) | emd-50445-v30.xml emd-50445.xml | 50.5 KB 50.5 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_50445_fsc.xml | 15.5 KB | Display | FSC data file |
| Images | emd_50445.png | 52.2 KB | ||
| Masks | emd_50445_msk_1.map | 320.5 MB | Mask map | |
| Filedesc metadata | emd-50445.cif.gz | 11.2 KB | ||
| Others | emd_50445_additional_1.map.gz emd_50445_half_map_1.map.gz emd_50445_half_map_2.map.gz | 285.7 MB 257.3 MB 257.2 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-50445 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-50445 | HTTPS FTP |
-Validation report
| Summary document | emd_50445_validation.pdf.gz | 962.9 KB | Display | EMDB validaton report |
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| Full document | emd_50445_full_validation.pdf.gz | 962.5 KB | Display | |
| Data in XML | emd_50445_validation.xml.gz | 23.5 KB | Display | |
| Data in CIF | emd_50445_validation.cif.gz | 30.8 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-50445 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-50445 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9fhlMC ![]() 9fraC ![]() 9frkC ![]() 9frlC ![]() 9fs6C ![]() 9fs8C ![]() 9fsfC ![]() 9fy0C M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_50445.map.gz / Format: CCP4 / Size: 320.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.834 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Mask #1
| File | emd_50445_msk_1.map | ||||||||||||
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-Additional map: #1
| File | emd_50445_additional_1.map | ||||||||||||
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-Half map: #2
| File | emd_50445_half_map_1.map | ||||||||||||
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-Half map: #1
| File | emd_50445_half_map_2.map | ||||||||||||
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Sample components
+Entire : High-resolution cryo-EM structure of Saccharolobus solfataricus 3...
+Supramolecule #1: High-resolution cryo-EM structure of Saccharolobus solfataricus 3...
+Macromolecule #1: rRNA 16S Sso
+Macromolecule #33: mRNA_Map
+Macromolecule #34: mRNA_Map
+Macromolecule #35: Initiator tRNA Met
+Macromolecule #2: Small ribosomal subunit protein eS1
+Macromolecule #3: Small ribosomal subunit protein uS2
+Macromolecule #4: Small zinc finger protein HVO-2753-like zinc-binding pocket domai...
+Macromolecule #5: Small ribosomal subunit protein uS4
+Macromolecule #6: Small ribosomal subunit protein eS4
+Macromolecule #7: Small ribosomal subunit protein uS5
+Macromolecule #8: Small ribosomal subunit protein eS6
+Macromolecule #9: Small ribosomal subunit protein uS7
+Macromolecule #10: Small ribosomal subunit protein uS8
+Macromolecule #11: Small ribosomal subunit protein eS8
+Macromolecule #12: Small ribosomal subunit protein uS9
+Macromolecule #13: Small ribosomal subunit protein uS10
+Macromolecule #14: Small ribosomal subunit protein uS11
+Macromolecule #15: Small ribosomal subunit protein uS12
+Macromolecule #16: Small ribosomal subunit protein uS13
+Macromolecule #17: Small ribosomal subunit protein uS14
+Macromolecule #18: Small ribosomal subunit protein uS15
+Macromolecule #19: Small ribosomal subunit protein uS17
+Macromolecule #20: Small ribosomal subunit protein eS17
+Macromolecule #21: Small ribosomal subunit protein uS19
+Macromolecule #22: Small ribosomal subunit protein eS19
+Macromolecule #23: Small ribosomal subunit protein eS24
+Macromolecule #24: Small ribosomal subunit protein eS27
+Macromolecule #25: Small ribosomal subunit protein eS28
+Macromolecule #26: Small ribosomal subunit protein eS31
+Macromolecule #27: Small ribosomal subunit protein uS3
+Macromolecule #28: Large ribosomal subunit protein eL8
+Macromolecule #29: aS34
+Macromolecule #30: Small ribosomal subunit protein eS25
+Macromolecule #31: VapB-type antitoxin
+Macromolecule #32: LSU ribosomal protein S30E (Rps30E)
+Macromolecule #36: MAGNESIUM ION
+Macromolecule #37: SPERMINE
+Macromolecule #38: ZINC ION
+Macromolecule #39: water
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 6.7 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 40.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Saccharolobus solfataricus P2 (archaea)
Authors
France, 1 items
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Processing
FIELD EMISSION GUN


