+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-9533 | |||||||||
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Title | Cryo-EM structure of the 70S ribosome from polysome | |||||||||
Map data | 70S ribosome from polysome | |||||||||
Sample |
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Function / homology | Function and homology information stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis ...stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis / negative regulation of cytoplasmic translation / translational termination / four-way junction DNA binding / DnaA-L2 complex / translation repressor activity / negative regulation of translational initiation / negative regulation of DNA-templated DNA replication initiation / regulation of mRNA stability / mRNA regulatory element binding translation repressor activity / ribosome assembly / assembly of large subunit precursor of preribosome / positive regulation of RNA splicing / transcription elongation factor complex / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / DNA endonuclease activity / response to reactive oxygen species / transcription antitermination / regulation of cell growth / DNA-templated transcription termination / maintenance of translational fidelity / response to radiation / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / large ribosomal subunit / ribosome biogenesis / ribosome binding / regulation of translation / ribosomal small subunit assembly / large ribosomal subunit rRNA binding / small ribosomal subunit / 5S rRNA binding / transferase activity / cytosolic small ribosomal subunit / ribosomal large subunit assembly / cytoplasmic translation / cytosolic large ribosomal subunit / tRNA binding / molecular adaptor activity / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Escherichia coli (E. coli) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 15.6 Å | |||||||||
Authors | Iwakura N / Yokoyama T / Quaglia F / Mitsuoka K / Mio K / Shigematsu H / Shirouzu M / Kaji A / Kaji H | |||||||||
Citation | Journal: PLoS One / Year: 2017 Title: Chemical and structural characterization of a model Post-Termination Complex (PoTC) for the ribosome recycling reaction: Evidence for the release of the mRNA by RRF and EF-G. Authors: Nobuhiro Iwakura / Takeshi Yokoyama / Fabio Quaglia / Kaoru Mitsuoka / Kazuhiro Mio / Hideki Shigematsu / Mikako Shirouzu / Akira Kaji / Hideko Kaji / Abstract: A model Post-Termination Complex (PoTC) used for the discovery of Ribosome Recycling Factor (RRF) was purified and characterized by cryo-electron microscopic analysis and biochemical methods. We ...A model Post-Termination Complex (PoTC) used for the discovery of Ribosome Recycling Factor (RRF) was purified and characterized by cryo-electron microscopic analysis and biochemical methods. We established that the model PoTC has mostly one tRNA, at the P/E or P/P position, together with one mRNA. The structural studies were supported by the biochemical measurement of bound tRNA and mRNA. Using this substrate, we establish that the release of tRNA, release of mRNA and splitting of ribosomal subunits occur during the recycling reaction. Order of these events is tRNA release first followed by mRNA release and splitting almost simultaneously. Moreover, we demonstrate that IF3 is not involved in any of the recycling reactions but simply prevents the re-association of split ribosomal subunits. Our finding demonstrates that the important function of RRF includes the release of mRNA, which is often missed by the use of a short ORF with the Shine-Dalgarno sequence near the termination site. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_9533.map.gz | 15.1 MB | EMDB map data format | |
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Header (meta data) | emd-9533-v30.xml emd-9533.xml | 8.5 KB 8.5 KB | Display Display | EMDB header |
Images | emd_9533.png | 163.5 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-9533 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-9533 | HTTPS FTP |
-Validation report
Summary document | emd_9533_validation.pdf.gz | 438.3 KB | Display | EMDB validaton report |
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Full document | emd_9533_full_validation.pdf.gz | 437.9 KB | Display | |
Data in XML | emd_9533_validation.xml.gz | 6.9 KB | Display | |
Data in CIF | emd_9533_validation.cif.gz | 8 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-9533 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-9533 | HTTPS FTP |
-Related structure data
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_9533.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | 70S ribosome from polysome | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.22 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : polysome
Entire | Name: polysome |
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Components |
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-Supramolecule #1: polysome
Supramolecule | Name: polysome / type: complex / ID: 1 / Parent: 0 |
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Source (natural) | Organism: Escherichia coli (E. coli) |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.6 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | JEOL 3100FFC |
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Image recording | Film or detector model: KODAK SO-163 FILM / Average electron dose: 30.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
-Image processing
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 15.6 Å / Resolution method: FSC 0.5 CUT-OFF / Number images used: 16719 |
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Initial angle assignment | Type: PROJECTION MATCHING / Software - Name: SPIDER |
Final angle assignment | Type: PROJECTION MATCHING / Software - Name: SPIDER |