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Yorodumi- EMDB-21644: Subunit joining exposes nascent pre-40S rRNA for processing and q... -
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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-21644 | ||||||||||||
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| Title | Subunit joining exposes nascent pre-40S rRNA for processing and quality control | ||||||||||||
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Sample |
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Keywords | 80S-like / Tsr1 / Structural heterogeneity / RIBOSOME | ||||||||||||
| Function / homology | Function and homology informationmaturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / regulation of amino acid metabolic process / negative regulation of glucose mediated signaling pathway / translational readthrough / positive regulation of translational fidelity / RMTs methylate histone arginines / Protein methylation / mTORC1-mediated signalling / Protein hydroxylation ...maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / regulation of amino acid metabolic process / negative regulation of glucose mediated signaling pathway / translational readthrough / positive regulation of translational fidelity / RMTs methylate histone arginines / Protein methylation / mTORC1-mediated signalling / Protein hydroxylation / GDP-dissociation inhibitor activity / ascospore wall assembly / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / nonfunctional rRNA decay / Ribosomal scanning and start codon recognition / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / preribosome, small subunit precursor / mRNA destabilization / Major pathway of rRNA processing in the nucleolus and cytosol / PELO:HBS1L and ABCE1 dissociate a ribosome on a non-stop mRNA / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / Formation of a pool of free 40S subunits / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / positive regulation of protein kinase activity / L13a-mediated translational silencing of Ceruloplasmin expression / negative regulation of translational frameshifting / G-protein alpha-subunit binding / ribonucleoprotein complex binding / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / 90S preribosome / ribosomal subunit export from nucleus / regulation of translational fidelity / ribosome-associated ubiquitin-dependent protein catabolic process / 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) / translation regulator activity / ribosomal small subunit export from nucleus / DNA-(apurinic or apyrimidinic site) endonuclease activity / cellular response to amino acid starvation / protein kinase C binding / rescue of stalled cytosolic ribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / translational initiation / maintenance of translational fidelity / modification-dependent protein catabolic process / cytoplasmic stress granule / protein tag activity / cytosolic ribosome / rRNA processing / ribosomal small subunit assembly / ribosome binding / ribosomal small subunit biogenesis / ribosome biogenesis / small ribosomal subunit / cytosolic small ribosomal subunit / small ribosomal subunit rRNA binding / cytoplasmic translation / negative regulation of translation / protein ubiquitination / rRNA binding / ribosome / translation / structural constituent of ribosome / G protein-coupled receptor signaling pathway / negative regulation of gene expression / mRNA binding / GTPase activity / nucleolus / mitochondrion / RNA binding / nucleoplasm / zinc ion binding / nucleus / cytosol / cytoplasm Similarity search - Function | ||||||||||||
| Biological species | ![]() ![]() | ||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.7 Å | ||||||||||||
Authors | Rai J / Parker MD | ||||||||||||
| Funding support | United States, 3 items
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Citation | Journal: RNA / Year: 2021Title: An open interface in the pre-80S ribosome coordinated by ribosome assembly factors Tsr1 and Dim1 enables temporal regulation of Fap7. Authors: Jay Rai / Melissa D Parker / Haina Huang / Stefan Choy / Homa Ghalei / Matthew C Johnson / Katrin Karbstein / M Elizabeth Stroupe / ![]() Abstract: During their maturation, nascent 40S subunits enter a translation-like quality control cycle, where they are joined by mature 60S subunits to form 80S-like ribosomes. While these assembly ...During their maturation, nascent 40S subunits enter a translation-like quality control cycle, where they are joined by mature 60S subunits to form 80S-like ribosomes. While these assembly intermediates are essential for maturation and quality control, how they form, and how their structure promotes quality control, remains unknown. To address these questions, we determined the structure of an 80S-like ribosome assembly intermediate to an overall resolution of 3.4 Å. The structure, validated by biochemical data, resolves a large body of previously paradoxical data and illustrates how assembly and translation factors cooperate to promote the formation of an interface that lacks many mature subunit contacts but is stabilized by the universally conserved methyltransferase Dim1. We also show how Tsr1 enables this interface by blocking the canonical binding of eIF5B to 40S subunits, while maintaining its binding to 60S. The structure also shows how this interface leads to unfolding of the platform, which allows for temporal regulation of the ATPase Fap7, thus linking 40S maturation to quality control during ribosome assembly. | ||||||||||||
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Structure visualization
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_21644.map.gz | 120.3 MB | EMDB map data format | |
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| Header (meta data) | emd-21644-v30.xml emd-21644.xml | 52.3 KB 52.3 KB | Display Display | EMDB header |
| Images | emd_21644.png | 172.7 KB | ||
| Filedesc metadata | emd-21644.cif.gz | 11.2 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-21644 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-21644 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 6wdrMC ![]() 6oigC C: citing same article ( M: atomic model generated by this map |
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| Similar structure data |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_21644.map.gz / Format: CCP4 / Size: 216 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: 1.24 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : 80S-like ribosome
+Supramolecule #1: 80S-like ribosome
+Macromolecule #1: 40S ribosomal protein S0-A
+Macromolecule #2: 40S ribosomal protein S2
+Macromolecule #3: 40S ribosomal protein S3
+Macromolecule #4: 40S ribosomal protein S4-A
+Macromolecule #5: 40S ribosomal protein S5
+Macromolecule #6: 40S ribosomal protein S6-A
+Macromolecule #7: 40S ribosomal protein S7-A
+Macromolecule #8: 40S ribosomal protein S8-A
+Macromolecule #9: 40S ribosomal protein S9-A
+Macromolecule #10: 40S ribosomal protein S10-A
+Macromolecule #11: 40S ribosomal protein S11-A
+Macromolecule #12: 40S ribosomal protein S12
+Macromolecule #13: 40S ribosomal protein S13
+Macromolecule #14: 40S ribosomal protein S15
+Macromolecule #15: 40S ribosomal protein S16-A
+Macromolecule #16: 40S ribosomal protein S17-A
+Macromolecule #17: 40S ribosomal protein S18-A
+Macromolecule #18: 40S ribosomal protein S19-A
+Macromolecule #19: 40S ribosomal protein S20
+Macromolecule #20: 40S ribosomal protein S21-A
+Macromolecule #21: 40S ribosomal protein S22-A
+Macromolecule #22: 40S ribosomal protein S23-A
+Macromolecule #23: 40S ribosomal protein S24-A
+Macromolecule #24: 40S ribosomal protein S25-A
+Macromolecule #25: 40S ribosomal protein S27-A
+Macromolecule #26: 40S ribosomal protein S28-A
+Macromolecule #27: 40S ribosomal protein S29-A
+Macromolecule #28: 40S ribosomal protein S30-A
+Macromolecule #29: Ubiquitin-40S ribosomal protein S31
+Macromolecule #30: Guanine nucleotide-binding protein subunit beta-like protein
+Macromolecule #31: Ribosome biogenesis protein TSR1
+Macromolecule #32: 20S ribosomal RNA
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 6.8 |
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| Grid | Details: unspecified |
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: DIRECT ELECTRON DE-64 (8k x 8k) / Average electron dose: 25.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing #1
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Image processing #2
-Atomic model buiding 1
| Refinement | Space: REAL |
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| Output model | ![]() PDB-6wdr: |
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About Yorodumi


Keywords
Authors
United States, 3 items
Citation
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