+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-14864 | |||||||||
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Title | 70S E. coli ribosome with truncated uL23 and uL24 loops | |||||||||
Map data | Main map | |||||||||
Sample |
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Keywords | ribosome / exit tunnel / structural modification / ribosomal protein | |||||||||
Function / homology | Function and homology information transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / ribosome assembly / assembly of large subunit precursor of preribosome ...transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / ribosome assembly / assembly of large subunit precursor of preribosome / cytosolic ribosome assembly / response to reactive oxygen species / DNA-templated transcription termination / response to radiation / mRNA 5'-UTR binding / large ribosomal subunit / large ribosomal subunit rRNA binding / 5S rRNA binding / transferase activity / ribosomal large subunit assembly / cytoplasmic translation / cytosolic large ribosomal subunit / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria) / Escherichia coli (E. coli) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.7 Å | |||||||||
Authors | Mitropoulou A / Wlodarski T / Ahn M / Becker TA / Beckmann R / Cabrita LD / Christodoulou J | |||||||||
Funding support | United Kingdom, 1 items
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Citation | Journal: Nat Commun / Year: 2022 Title: Modulating co-translational protein folding by rational design and ribosome engineering. Authors: Minkoo Ahn / Tomasz Włodarski / Alkistis Mitropoulou / Sammy H S Chan / Haneesh Sidhu / Elena Plessa / Thomas A Becker / Nediljko Budisa / Christopher A Waudby / Roland Beckmann / Anaïs M ...Authors: Minkoo Ahn / Tomasz Włodarski / Alkistis Mitropoulou / Sammy H S Chan / Haneesh Sidhu / Elena Plessa / Thomas A Becker / Nediljko Budisa / Christopher A Waudby / Roland Beckmann / Anaïs M E Cassaignau / Lisa D Cabrita / John Christodoulou / Abstract: Co-translational folding is a fundamental process for the efficient biosynthesis of nascent polypeptides that emerge through the ribosome exit tunnel. To understand how this process is modulated by ...Co-translational folding is a fundamental process for the efficient biosynthesis of nascent polypeptides that emerge through the ribosome exit tunnel. To understand how this process is modulated by the shape and surface of the narrow tunnel, we have rationally engineered three exit tunnel protein loops (uL22, uL23 and uL24) of the 70S ribosome by CRISPR/Cas9 gene editing, and studied the co-translational folding of an immunoglobulin-like filamin domain (FLN5). Our thermodynamics measurements employing F/N/methyl-TROSY NMR spectroscopy together with cryo-EM and molecular dynamics simulations reveal how the variations in the lengths of the loops present across species exert their distinct effects on the free energy of FLN5 folding. A concerted interplay of the uL23 and uL24 loops is sufficient to alter co-translational folding energetics, which we highlight by the opposite folding outcomes resulting from their extensions. These subtle modulations occur through a combination of the steric effects relating to the shape of the tunnel, the dynamic interactions between the ribosome surface and the unfolded nascent chain, and its altered exit pathway within the vestibule. These results illustrate the role of the exit tunnel structure in co-translational folding, and provide principles for how to remodel it to elicit a desired folding outcome. | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_14864.map.gz | 109.2 MB | EMDB map data format | |
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Header (meta data) | emd-14864-v30.xml emd-14864.xml | 46 KB 46 KB | Display Display | EMDB header |
Images | emd_14864.png | 117 KB | ||
Masks | emd_14864_msk_1.map | 190.1 MB | Mask map | |
Filedesc metadata | emd-14864.cif.gz | 9.6 KB | ||
Others | emd_14864_additional_1.map.gz emd_14864_half_map_1.map.gz emd_14864_half_map_2.map.gz | 147 MB 147.1 MB 147.1 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-14864 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-14864 | HTTPS FTP |
-Validation report
Summary document | emd_14864_validation.pdf.gz | 876.5 KB | Display | EMDB validaton report |
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Full document | emd_14864_full_validation.pdf.gz | 876.1 KB | Display | |
Data in XML | emd_14864_validation.xml.gz | 15 KB | Display | |
Data in CIF | emd_14864_validation.cif.gz | 17.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-14864 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-14864 | HTTPS FTP |
-Related structure data
Related structure data | 7zq5MC 7z20C 7zodC 7zp8C 7zq6C M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_14864.map.gz / Format: CCP4 / Size: 190.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Annotation | Main map | ||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.085 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
File | emd_14864_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Additional map: Unsharpened map
File | emd_14864_additional_1.map | ||||||||||||
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Annotation | Unsharpened map | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Half map 1
File | emd_14864_half_map_1.map | ||||||||||||
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Annotation | Half map 1 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_14864_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
+Entire : E coli ribosome with uL23 and uL24 loop truncation
+Supramolecule #1: E coli ribosome with uL23 and uL24 loop truncation
+Macromolecule #1: 50S ribosomal protein L28
+Macromolecule #2: 50S ribosomal protein L29
+Macromolecule #3: 50S ribosomal protein L30
+Macromolecule #4: 50S ribosomal protein L32
+Macromolecule #5: 50S ribosomal protein L33
+Macromolecule #6: 50S ribosomal protein L34
+Macromolecule #7: 50S ribosomal protein L35
+Macromolecule #8: 50S ribosomal protein L36
+Macromolecule #11: 50S ribosomal protein L2
+Macromolecule #12: 50S ribosomal protein L3
+Macromolecule #13: 50S ribosomal protein L4
+Macromolecule #14: 50S ribosomal protein L5
+Macromolecule #15: 50S ribosomal protein L6
+Macromolecule #16: 50S ribosomal protein L9
+Macromolecule #17: 50S ribosomal protein L13
+Macromolecule #18: 50S ribosomal protein L14
+Macromolecule #19: 50S ribosomal protein L15
+Macromolecule #20: 50S ribosomal protein L16
+Macromolecule #21: 50S ribosomal protein L17
+Macromolecule #22: 50S ribosomal protein L18
+Macromolecule #23: 50S ribosomal protein L19
+Macromolecule #24: 50S ribosomal protein L20
+Macromolecule #25: 50S ribosomal protein L21
+Macromolecule #26: 50S ribosomal protein L22
+Macromolecule #27: 50S ribosomal protein L23
+Macromolecule #28: 50S ribosomal protein L24
+Macromolecule #29: 50S ribosomal protein L25
+Macromolecule #30: 50S ribosomal protein L27
+Macromolecule #9: 5S rRNA
+Macromolecule #10: 23S rRNA
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % |
-Electron microscopy
Microscope | TFS KRIOS |
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Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Average electron dose: 42.9 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: 2.2 µm / Nominal defocus min: 0.7000000000000001 µm |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: INSILICO MODEL |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 2.7 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 131042 |
Initial angle assignment | Type: ANGULAR RECONSTITUTION |
Final angle assignment | Type: ANGULAR RECONSTITUTION |