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Yorodumi- EMDB-20248: Structure of a mammalian small ribosomal subunit in complex with ... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-20248 | |||||||||
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Title | Structure of a mammalian small ribosomal subunit in complex with the Israeli Acute Paralysis Virus IRES (Class 1) | |||||||||
Map data | ||||||||||
Sample |
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Function / homology | Function and homology information ribosomal subunit / laminin receptor activity / mammalian oogenesis stage / activation-induced cell death of T cells / positive regulation of signal transduction by p53 class mediator / ubiquitin ligase inhibitor activity / phagocytic cup / 90S preribosome / TOR signaling / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) ...ribosomal subunit / laminin receptor activity / mammalian oogenesis stage / activation-induced cell death of T cells / positive regulation of signal transduction by p53 class mediator / ubiquitin ligase inhibitor activity / phagocytic cup / 90S preribosome / TOR signaling / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / T cell proliferation involved in immune response / erythrocyte development / ribosomal small subunit export from nucleus / translation regulator activity / laminin binding / rough endoplasmic reticulum / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / gastrulation / MDM2/MDM4 family protein binding / cytosolic ribosome / class I DNA-(apurinic or apyrimidinic site) endonuclease activity / DNA-(apurinic or apyrimidinic site) lyase / rescue of stalled ribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / cellular response to leukemia inhibitory factor / small-subunit processome / protein kinase C binding / positive regulation of apoptotic signaling pathway / positive regulation of protein-containing complex assembly / placenta development / spindle / cytoplasmic ribonucleoprotein granule / modification-dependent protein catabolic process / G1/S transition of mitotic cell cycle / protein tag activity / rRNA processing / ribosomal small subunit biogenesis / rhythmic process / positive regulation of canonical Wnt signaling pathway / small ribosomal subunit rRNA binding / ribosome binding / glucose homeostasis / regulation of translation / ribosomal small subunit assembly / virus receptor activity / small ribosomal subunit / T cell differentiation in thymus / cytosolic small ribosomal subunit / cell body / cytoplasmic translation / perikaryon / mitochondrial inner membrane / postsynaptic density / cell differentiation / rRNA binding / ribosome / protein ubiquitination / structural constituent of ribosome / positive regulation of apoptotic process / positive regulation of protein phosphorylation / ribonucleoprotein complex / translation / cell division / DNA repair / mRNA binding / centrosome / dendrite / ubiquitin protein ligase binding / positive regulation of cell population proliferation / synapse / negative regulation of apoptotic process / nucleolus / apoptotic process / protein kinase binding / perinuclear region of cytoplasm / Golgi apparatus / endoplasmic reticulum / DNA binding / RNA binding / zinc ion binding / membrane / nucleus / metal ion binding / plasma membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Israeli acute paralysis virus / Oryctolagus cuniculus (rabbit) / Rabbit (rabbit) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
Authors | Acosta-Reyes FJ / Neupane R / Frank J / Fernandez IS | |||||||||
Funding support | United States, 1 items
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Citation | Journal: EMBO J / Year: 2019 Title: The Israeli acute paralysis virus IRES captures host ribosomes by mimicking a ribosomal state with hybrid tRNAs. Authors: Francisco Acosta-Reyes / Ritam Neupane / Joachim Frank / Israel S Fernández / Abstract: Colony collapse disorder (CCD) is a multi-faceted syndrome decimating bee populations worldwide, and a group of viruses of the widely distributed Dicistroviridae family have been identified as a ...Colony collapse disorder (CCD) is a multi-faceted syndrome decimating bee populations worldwide, and a group of viruses of the widely distributed Dicistroviridae family have been identified as a causing agent of CCD. This family of viruses employs non-coding RNA sequences, called internal ribosomal entry sites (IRESs), to precisely exploit the host machinery for viral protein production. Using single-particle cryo-electron microscopy (cryo-EM), we have characterized how the IRES of Israeli acute paralysis virus (IAPV) intergenic region captures and redirects translating ribosomes toward viral RNA messages. We reconstituted two in vitro reactions targeting a pre-translocation and a post-translocation state of the IAPV-IRES in the ribosome, allowing us to identify six structures using image processing classification methods. From these, we reconstructed the trajectory of IAPV-IRES from the early small subunit recruitment to the final post-translocated state in the ribosome. An early commitment of IRES/ribosome complexes for global pre-translocation mimicry explains the high efficiency observed for this IRES. Efforts directed toward fighting CCD by targeting the IAPV-IRES using RNA-interference technology are underway, and the structural framework presented here may assist in further refining these approaches. | |||||||||
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_20248.map.gz | 13 MB | EMDB map data format | |
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Header (meta data) | emd-20248-v30.xml emd-20248.xml | 54.9 KB 54.9 KB | Display Display | EMDB header |
Images | emd_20248.png | 192.5 KB | ||
Masks | emd_20248_msk_1.map | 115.9 MB | Mask map | |
Others | emd_20248_additional.map.gz emd_20248_half_map_1.map.gz emd_20248_half_map_2.map.gz | 90.8 MB 91.1 MB 91.1 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-20248 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-20248 | HTTPS FTP |
-Validation report
Summary document | emd_20248_validation.pdf.gz | 756.1 KB | Display | EMDB validaton report |
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Full document | emd_20248_full_validation.pdf.gz | 755.6 KB | Display | |
Data in XML | emd_20248_validation.xml.gz | 13.6 KB | Display | |
Data in CIF | emd_20248_validation.cif.gz | 16.1 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-20248 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-20248 | HTTPS FTP |
-Related structure data
Related structure data | 6p4gMC 6p4hC 6p5iC 6p5jC 6p5kC 6p5nC M: atomic model generated by this map C: citing same article (ref.) |
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Similar 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_20248.map.gz / Format: CCP4 / Size: 115.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.233 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
File | emd_20248_msk_1.map | ||||||||||||
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Density Histograms |
-Additional map: #1
File | emd_20248_additional.map | ||||||||||||
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Density Histograms |
-Half map: #2
File | emd_20248_half_map_1.map | ||||||||||||
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Density Histograms |
-Half map: #1
File | emd_20248_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
+Entire : Structure of a mammalian small ribosomal subunit in complex with ...
+Supramolecule #1: Structure of a mammalian small ribosomal subunit in complex with ...
+Macromolecule #1: 18S rRNA
+Macromolecule #36: IAPV-IRES
+Macromolecule #2: uS2
+Macromolecule #3: eS1
+Macromolecule #4: uS5
+Macromolecule #5: uS3
+Macromolecule #6: eS4
+Macromolecule #7: uS7
+Macromolecule #8: eS6
+Macromolecule #9: eS7
+Macromolecule #10: eS8
+Macromolecule #11: uS4
+Macromolecule #12: eS10
+Macromolecule #13: uS17
+Macromolecule #14: eS12
+Macromolecule #15: uS15
+Macromolecule #16: uS11
+Macromolecule #17: uS19
+Macromolecule #18: uS9
+Macromolecule #19: eS17
+Macromolecule #20: uS13
+Macromolecule #21: eS19
+Macromolecule #22: uS10
+Macromolecule #23: eS21
+Macromolecule #24: uS8
+Macromolecule #25: uS12
+Macromolecule #26: eS24
+Macromolecule #27: eS25
+Macromolecule #28: eS26
+Macromolecule #29: eS27
+Macromolecule #30: eS28
+Macromolecule #31: eS29
+Macromolecule #32: eS30
+Macromolecule #33: eS31
+Macromolecule #34: RACK1
+Macromolecule #35: eL41
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation #1
Preparation ID | 1 | ||||||||||
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Buffer | pH: 7.5 Component:
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Grid | Model: Quantifoil R2/2 / Material: COPPER / Support film - Film type ID: 1 / Support film - Material: CARBON / Support film - topology: HOLEY / Support film - Film thickness: 5.0 nm / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Atmosphere: OTHER / Pretreatment - Pressure: 9.33257 kPa Details: Plasma cleaning for both holey carbon and holey gold grids was done on a Gatan Solarus with Hydrogen (6.4 sccm gas flow) and Oxygen (27.5 sccm gas flow) and 10 W cleaning power. | ||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV Details: Blot force = 3s Wait time = 15s Drain time = 0s Blot time = 2.5 to 3 s. | ||||||||||
Details | Ribosomal complexes for the pre-translocated state were assembled at 240-390 nM concentration and applied to plasma treated holey carbon grids. |
-Sample preparation #2
Preparation ID | 2 | ||||||||||
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Buffer | pH: 7.5 Component:
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Grid | Model: Quantifoil R2/2 / Material: COPPER / Support film - Film type ID: 1 / Support film - Material: CARBON / Support film - topology: HOLEY / Support film - Film thickness: 5.0 nm / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Atmosphere: OTHER / Pretreatment - Pressure: 9.33257 kPa Details: Plasma cleaning for both holey carbon and holey gold grids was done on a Gatan Solarus with Hydrogen (6.4 sccm gas flow) and Oxygen (27.5 sccm gas flow) and 10 W cleaning power. | ||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV Details: Blot force = 3s Wait time = 15s Drain time = 0s Blot time = 2.5 to 3 s. | ||||||||||
Details | Same sample and buffer conditions used for the holey carbon grids was used for the holey gold grids. |
-Electron microscopy
Microscope | FEI TECNAI F30 |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Dimensions - Width: 3710 pixel / Digitization - Dimensions - Height: 3838 pixel / Digitization - Frames/image: 1-40 / Number real images: 11234 / Average exposure time: 8.0 sec. / Average electron dose: 42.1 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.26 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 31000 |
Sample stage | Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Tecnai F30 / Image courtesy: FEI Company |