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Open data
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Basic information
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Title | Cryo-EM captures early ribosome assembly in action | |||||||||
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Function / homology | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Lauer S / Nikolay R / Qin B | |||||||||
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![]() | ![]() Title: Cryo-EM captures early ribosome assembly in action. Authors: Bo Qin / Simon M Lauer / Annika Balke / Carlos H Vieira-Vieira / Jörg Bürger / Thorsten Mielke / Matthias Selbach / Patrick Scheerer / Christian M T Spahn / Rainer Nikolay / ![]() Abstract: Ribosome biogenesis is a fundamental multi-step cellular process in all domains of life that involves the production, processing, folding, and modification of ribosomal RNAs (rRNAs) and ribosomal ...Ribosome biogenesis is a fundamental multi-step cellular process in all domains of life that involves the production, processing, folding, and modification of ribosomal RNAs (rRNAs) and ribosomal proteins. To obtain insights into the still unexplored early assembly phase of the bacterial 50S subunit, we exploited a minimal in vitro reconstitution system using purified ribosomal components and scalable reaction conditions. Time-limited assembly assays combined with cryo-EM analysis visualizes the structurally complex assembly pathway starting with a particle consisting of ordered density for only ~500 nucleotides of 23S rRNA domain I and three ribosomal proteins. In addition, our structural analysis reveals that early 50S assembly occurs in a domain-wise fashion, while late 50S assembly proceeds incrementally. Furthermore, we find that both ribosomal proteins and folded rRNA helices, occupying surface exposed regions on pre-50S particles, induce, or stabilize rRNA folds within adjacent regions, thereby creating cooperativity. | |||||||||
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 97.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 34.8 KB 34.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 9.5 KB | Display | ![]() |
Images | ![]() | 87.9 KB | ||
Masks | ![]() | 103 MB | ![]() | |
Others | ![]() ![]() | 95.5 MB 95.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8c91MC ![]() 8c8xC ![]() 8c8yC ![]() 8c8zC ![]() 8c90C ![]() 8c92C ![]() 8c93C ![]() 8c94C ![]() 8c95C ![]() 8c96C ![]() 8c97C ![]() 8c98C ![]() 8c99C ![]() 8c9aC ![]() 8c9bC ![]() 8c9cC 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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Voxel size | X=Y=Z: 1.25 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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-Half map: #2
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Density Histograms |
-Half map: #1
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Density Histograms |
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Sample components
+Entire : large ribosomal subunit precursor C_L2
+Supramolecule #1: large ribosomal subunit precursor C_L2
+Macromolecule #1: 50S ribosomal protein L2
+Macromolecule #2: 50S ribosomal protein L3
+Macromolecule #3: 50S ribosomal protein L4
+Macromolecule #4: 50S ribosomal protein L13
+Macromolecule #5: 50S ribosomal protein L14
+Macromolecule #6: 50S ribosomal protein L15
+Macromolecule #7: 50S ribosomal protein L17
+Macromolecule #8: 50S ribosomal protein L19
+Macromolecule #9: 50S ribosomal protein L20
+Macromolecule #10: 50S ribosomal protein L21
+Macromolecule #11: 50S ribosomal protein L22
+Macromolecule #12: 50S ribosomal protein L23
+Macromolecule #13: 50S ribosomal protein L24
+Macromolecule #14: 50S ribosomal protein L29
+Macromolecule #15: 50S ribosomal protein L32
+Macromolecule #16: 50S ribosomal protein L34
+Macromolecule #17: 50S ribosomal protein L30
+Macromolecule #18: 23S rRNA
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.6 |
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Grid | Model: Quantifoil / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI POLARA 300 |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: OTHER / Imaging mode: OTHER / Cs: 2.0 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.5 µm / Nominal magnification: 31000 |
Sample stage | Cooling holder cryogen: NITROGEN |
Temperature | Min: 82.0 K / Max: 83.0 K |
Software | Name: Leginon |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average exposure time: 10.0 sec. / Average electron dose: 62.0 e/Å2 |
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Software | Name: ![]() |
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Refinement | Space: REAL |
Output model | ![]() PDB-8c91: |