+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-18340 | |||||||||
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Title | ApdP-SRC with P-tRNA only | |||||||||
Map data | Main map, post-processed | |||||||||
Sample |
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Keywords | Stalling / nascent chain / translation arrest / regulation / RIBOSOME | |||||||||
Biological species | Sinorhizobium medicae (bacteria) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.9 Å | |||||||||
Authors | Morici M / Wilson DN | |||||||||
Funding support | Germany, 1 items
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Citation | Journal: Nat Commun / Year: 2024 Title: RAPP-containing arrest peptides induce translational stalling by short circuiting the ribosomal peptidyltransferase activity. Authors: Martino Morici / Sara Gabrielli / Keigo Fujiwara / Helge Paternoga / Bertrand Beckert / Lars V Bock / Shinobu Chiba / Daniel N Wilson / Abstract: Arrest peptides containing RAPP (ArgAlaProPro) motifs have been discovered in both Gram-positive and Gram-negative bacteria, where they are thought to regulate expression of important protein ...Arrest peptides containing RAPP (ArgAlaProPro) motifs have been discovered in both Gram-positive and Gram-negative bacteria, where they are thought to regulate expression of important protein localization machinery components. Here we determine cryo-EM structures of ribosomes stalled on RAPP arrest motifs in both Bacillus subtilis and Escherichia coli. Together with molecular dynamics simulations, our structures reveal that the RAPP motifs allow full accommodation of the A-site tRNA, but prevent the subsequent peptide bond from forming. Our data support a model where the RAP in the P-site interacts and stabilizes a single hydrogen atom on the Pro-tRNA in the A-site, thereby preventing an optimal geometry for the nucleophilic attack required for peptide bond formation to occur. This mechanism to short circuit the ribosomal peptidyltransferase activity is likely to operate for the majority of other RAPP-like arrest peptides found across diverse bacterial phylogenies. | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_18340.map.gz | 47.4 MB | EMDB map data format | |
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Header (meta data) | emd-18340-v30.xml emd-18340.xml | 21.3 KB 21.3 KB | Display Display | EMDB header |
Images | emd_18340.png | 69.6 KB | ||
Filedesc metadata | emd-18340.cif.gz | 4.2 KB | ||
Others | emd_18340_additional_1.map.gz emd_18340_half_map_1.map.gz emd_18340_half_map_2.map.gz | 141 MB 141.4 MB 141.4 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-18340 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-18340 | HTTPS FTP |
-Related structure data
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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-Map
File | Download / File: emd_18340.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||
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Annotation | Main map, post-processed | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.82 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: Preprocessed nao
File | emd_18340_additional_1.map | ||||||||||||
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Annotation | Preprocessed nao | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Half-map 1
File | emd_18340_half_map_1.map | ||||||||||||
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Annotation | Half-map 1 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Half-map 2
File | emd_18340_half_map_2.map | ||||||||||||
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Annotation | Half-map 2 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Sample components
-Entire : E. coli ApdP-stalled ribosomal complex
Entire | Name: E. coli ApdP-stalled ribosomal complex |
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Components |
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-Supramolecule #1: E. coli ApdP-stalled ribosomal complex
Supramolecule | Name: E. coli ApdP-stalled ribosomal complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#51 |
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Source (natural) | Organism: Sinorhizobium medicae (bacteria) |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.4 |
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Vitrification | Cryogen name: ETHANE-PROPANE |
-Electron microscopy
Microscope | TFS KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.6 µm |
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 75.6 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: OTHER Details: Exprimental unpublished map from our lab from an analogous ample, previously low-pass filtered |
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Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 17657 |