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Yorodumi- EMDB-32790: Cryo-EM structure of a yeast pre-40S ribosomal subunit - State Dis-D -
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Basic information
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| Title | Cryo-EM structure of a yeast pre-40S ribosomal subunit - State Dis-D | |||||||||
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Keywords | ribosome biogenesis / 40S ribosome / RIBOSOME | |||||||||
| Function / homology | Function and homology information18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase activity / Mpp10 complex / rRNA modification / regulation of rRNA processing / rRNA (adenine-N6,N6-)-dimethyltransferase activity / endonucleolytic cleavage in 5'-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / rRNA primary transcript binding ...18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase activity / Mpp10 complex / rRNA modification / regulation of rRNA processing / rRNA (adenine-N6,N6-)-dimethyltransferase activity / endonucleolytic cleavage in 5'-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / rRNA primary transcript binding / sno(s)RNA-containing ribonucleoprotein complex / Negative regulators of DDX58/IFIH1 signaling / mTORC1-mediated signalling / rRNA methylation / Protein hydroxylation / U3 snoRNA binding / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / Ribosomal scanning and start codon recognition / preribosome, small subunit precursor / Major pathway of rRNA processing in the nucleolus and cytosol / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / Formation of a pool of free 40S subunits / L13a-mediated translational silencing of Ceruloplasmin expression / 90S preribosome / Ub-specific processing proteases / proteasome assembly / regulation of translational fidelity / ribosomal small subunit export from nucleus / 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) / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosome assembly / maturation of SSU-rRNA / small-subunit processome / maintenance of translational fidelity / rRNA processing / unfolded protein binding / ribosome biogenesis / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / cytoplasmic translation / rRNA binding / structural constituent of ribosome / ribosome / translation / GTPase activity / mRNA binding / GTP binding / nucleolus / ATP hydrolysis activity / mitochondrion / RNA binding / zinc ion binding / nucleoplasm / ATP binding / identical protein binding / nucleus / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species | ![]() | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.3 Å | |||||||||
Authors | Cheng J / La Venuta G / Lau B / Berninghausen O / Beckmann R / Hurt E | |||||||||
| Funding support | 1 items
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Citation | Journal: Nucleic Acids Res / Year: 2022Title: In vitro structural maturation of an early stage pre-40S particle coupled with U3 snoRNA release and central pseudoknot formation. Authors: Jingdong Cheng / Giuseppe La Venuta / Benjamin Lau / Otto Berninghausen / Roland Beckmann / Ed Hurt / ![]() Abstract: The transition of the 90S to the pre-40S pre-ribosome is a decisive step in eukaryotic small subunit biogenesis leading to a first pre-40S intermediate (state Dis-C or primordial pre-40S), where the ...The transition of the 90S to the pre-40S pre-ribosome is a decisive step in eukaryotic small subunit biogenesis leading to a first pre-40S intermediate (state Dis-C or primordial pre-40S), where the U3 snoRNA keeps the nascent 18S rRNA locally immature. We in vitro reconstitute the ATP-dependent U3 release from this particle, catalyzed by the helicase Dhr1, and follow this process by cryo-EM revealing two successive pre-40S intermediates, Dis-D and Dis-E. The latter has lost not only U3 but all residual 90S factors including the GTPase Bms1. In vitro remodeling likewise induced the formation of the central pseudoknot, a universally conserved tertiary RNA structure that comprises the core of the small subunit decoding center. Thus, we could structurally reveal a key tertiary RNA folding step that is essential to form the active 40S subunit. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_32790.map.gz | 105.2 MB | EMDB map data format | |
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| Header (meta data) | emd-32790-v30.xml emd-32790.xml | 33 KB 33 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_32790_fsc.xml | 12.8 KB | Display | FSC data file |
| Images | emd_32790.png | 96 KB | ||
| Filedesc metadata | emd-32790.cif.gz | 10 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-32790 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-32790 | HTTPS FTP |
-Validation report
| Summary document | emd_32790_validation.pdf.gz | 452.8 KB | Display | EMDB validaton report |
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| Full document | emd_32790_full_validation.pdf.gz | 452.3 KB | Display | |
| Data in XML | emd_32790_validation.xml.gz | 13 KB | Display | |
| Data in CIF | emd_32790_validation.cif.gz | 17.6 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-32790 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-32790 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 7wtlMC ![]() 7wtmC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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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_32790.map.gz / Format: CCP4 / Size: 178 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: 1.047 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Yeast pre-40S ribosomal subunit
+Supramolecule #1: Yeast pre-40S ribosomal subunit
+Macromolecule #1: 18S rRNA
+Macromolecule #2: 40S ribosomal protein S1-A
+Macromolecule #3: 40S ribosomal protein S4-A
+Macromolecule #4: 40S ribosomal protein S6-A
+Macromolecule #5: 40S ribosomal protein S7-A
+Macromolecule #6: 40S ribosomal protein S8-A
+Macromolecule #7: 40S ribosomal protein S9-A
+Macromolecule #8: 40S ribosomal protein S11-A
+Macromolecule #9: 40S ribosomal protein S13
+Macromolecule #10: 40S ribosomal protein S14-A
+Macromolecule #11: 40S ribosomal protein S22-A
+Macromolecule #12: 40S ribosomal protein S23-A
+Macromolecule #13: 40S ribosomal protein S24-A
+Macromolecule #14: 40S ribosomal protein S27-A
+Macromolecule #15: Pre-rRNA-processing protein PNO1
+Macromolecule #16: U3 small nucleolar RNA-associated protein MPP10
+Macromolecule #17: Ribosome biogenesis protein BMS1
+Macromolecule #18: Something about silencing protein 10
+Macromolecule #19: Dimethyladenosine transferase
+Macromolecule #20: ZINC ION
+Macromolecule #21: GUANOSINE-5'-TRIPHOSPHATE
+Macromolecule #22: MAGNESIUM ION
-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: 7.4 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 44.0 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: 2.5 µm / Nominal defocus min: 0.8 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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