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- EMDB-50725: Cryo-EM structure of Saccharolobus solfataricus 30S ribosomal sub... -
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Basic information
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Title | Cryo-EM structure of Saccharolobus solfataricus 30S ribosomal subunit with helix 44 in position down bound to mRNA and initiator tRNA | |||||||||
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![]() | 30S / ribosome / Translation / Saccharolobus solfataricus | |||||||||
Function / homology | ![]() 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 / cytosolic small ribosomal subunit / small ribosomal subunit rRNA binding ...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 / cytosolic small ribosomal subunit / small ribosomal subunit rRNA binding / cytoplasmic translation / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / mRNA binding / RNA binding / zinc ion binding / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||
![]() | Bourgeois G / Coureux PD / Mechulam Y / Schmitt E | |||||||||
Funding support | ![]()
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![]() | ![]() Title: 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
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 122.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 57.5 KB 57.5 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 13.3 KB | Display | ![]() |
Images | ![]() | 66.7 KB | ||
Masks | ![]() | 244.1 MB | ![]() | |
Filedesc metadata | ![]() | 11.4 KB | ||
Others | ![]() ![]() ![]() | 230 MB 226.4 MB 226.4 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9fs8MC ![]() 9fhlC ![]() 9fraC ![]() 9frkC ![]() 9frlC ![]() 9fs6C ![]() 9fsfC ![]() 9fy0C M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.88 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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-Additional map: #1
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-Half map: #2
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-Half map: #1
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Sample components
+Entire : Cryo-EM structure of Saccharolobus solfataricus 30S with helix44 ...
+Supramolecule #1: Cryo-EM structure of Saccharolobus solfataricus 30S with helix44 ...
+Supramolecule #2: Saccharolobus solfataricus 30S
+Supramolecule #3: tRNA met initiator
+Supramolecule #4: mRNA
+Macromolecule #1: rRNA 16S
+Macromolecule #3: tRNA met initiator
+Macromolecule #34: mRNA Ss-aEF1A-like
+Macromolecule #2: Large ribosomal subunit protein eL8
+Macromolecule #4: Small ribosomal subunit protein eS1
+Macromolecule #5: Small ribosomal subunit protein uS2
+Macromolecule #6: Small zinc finger protein HVO-2753-like zinc-binding pocket domai...
+Macromolecule #7: Small ribosomal subunit protein uS4
+Macromolecule #8: Small ribosomal subunit protein eS4
+Macromolecule #9: Small ribosomal subunit protein uS5
+Macromolecule #10: Small ribosomal subunit protein eS6
+Macromolecule #11: Small ribosomal subunit protein uS7
+Macromolecule #12: Small ribosomal subunit protein uS8
+Macromolecule #13: Small ribosomal subunit protein eS8
+Macromolecule #14: Small ribosomal subunit protein uS9
+Macromolecule #15: Small ribosomal subunit protein uS10
+Macromolecule #16: Small ribosomal subunit protein uS11
+Macromolecule #17: Small ribosomal subunit protein uS12
+Macromolecule #18: Small ribosomal subunit protein uS13
+Macromolecule #19: Small ribosomal subunit protein uS14
+Macromolecule #20: Small ribosomal subunit protein uS15
+Macromolecule #21: Small ribosomal subunit protein uS17
+Macromolecule #22: Small ribosomal subunit protein eS17
+Macromolecule #23: Small ribosomal subunit protein uS19
+Macromolecule #24: Small ribosomal subunit protein eS19
+Macromolecule #25: Small ribosomal subunit protein eS24
+Macromolecule #26: Small ribosomal subunit protein eS27
+Macromolecule #27: Small ribosomal subunit protein eS28
+Macromolecule #28: Small ribosomal subunit protein eS31
+Macromolecule #29: Small ribosomal subunit protein uS3
+Macromolecule #30: aS34
+Macromolecule #31: Small ribosomal subunit protein eS25
+Macromolecule #32: aS33
+Macromolecule #33: LSU ribosomal protein S30E (Rps30E)
+Macromolecule #35: LSU ribosomal protein S26E (Rps26E)
+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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![]() | 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 GLACIOS |
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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: 200 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 µm |