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Yorodumi- EMDB-11519: Cryo-EM structure of a late human pre-40S ribosomal subunit - State G -
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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-11519 | |||||||||
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| Title | Cryo-EM structure of a late human pre-40S ribosomal subunit - State G | |||||||||
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Keywords | Ribosome Biogenesis / Pre-40S / RIBOSOME | |||||||||
| Function / homology | Function and homology informationphenylalanyl-tRNA aminoacylation / phenylalanine-tRNA ligase activity / methyltransferase complex / methylosome / positive regulation of rRNA processing / negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / positive regulation of respiratory burst involved in inflammatory response ...phenylalanyl-tRNA aminoacylation / phenylalanine-tRNA ligase activity / methyltransferase complex / methylosome / positive regulation of rRNA processing / negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / positive regulation of respiratory burst involved in inflammatory response / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / IRE1-RACK1-PP2A complex / TNFR1-mediated ceramide production / positive regulation of Golgi to plasma membrane protein transport / nucleolus organization / positive regulation of ubiquitin-protein transferase activity / negative regulation of RNA splicing / positive regulation of DNA-templated transcription initiation / negative regulation of DNA repair / preribosome, small subunit precursor / erythrocyte homeostasis / supercoiled DNA binding / regulation of establishment of cell polarity / rRNA modification in the nucleus and cytosol / oxidized purine DNA binding / NF-kappaB complex / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / negative regulation of phagocytosis / ubiquitin-like protein conjugating enzyme binding / cytoplasmic translational initiation / cytoplasmic side of rough endoplasmic reticulum membrane / Formation of the ternary complex, and subsequently, the 43S complex / ion channel inhibitor activity / laminin receptor activity / Ribosomal scanning and start codon recognition / protein kinase A binding / Translation initiation complex formation / negative regulation of Wnt signaling pathway / BH3 domain binding / fibroblast growth factor binding / Protein hydroxylation / TOR signaling / negative regulation of translational frameshifting / mTORC1-mediated signalling / monocyte chemotaxis / PELO:HBS1L and ABCE1 dissociate a ribosome on a non-stop mRNA / SARS-CoV-1 modulates host translation machinery / regulation of cell division / positive regulation of GTPase activity / Peptide chain elongation / negative regulation of protein binding / Selenocysteine synthesis / Formation of a pool of free 40S subunits / negative regulation of respiratory burst involved in inflammatory response / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / protein serine/threonine kinase inhibitor activity / Eukaryotic Translation Termination / Dengue Virus Attachment and Entry / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / Viral mRNA Translation / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ubiquitin ligase inhibitor activity / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / positive regulation of signal transduction by p53 class mediator / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides / regulation of translational fidelity / Major pathway of rRNA processing in the nucleolus and cytosol / spindle assembly / positive regulation of microtubule polymerization / phagocytic cup / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of ubiquitin-dependent protein catabolic process / Protein methylation / RNA endonuclease activity / positive regulation of cell cycle / 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 / Nuclear events stimulated by ALK signaling in cancer / DNA-(apurinic or apyrimidinic site) endonuclease activity / ribosomal small subunit export from nucleus / negative regulation of protein ubiquitination / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / rough endoplasmic reticulum / translation initiation factor activity / laminin binding / SH2 domain binding / positive regulation of apoptotic signaling pathway / signaling adaptor activity / Maturation of protein E / MDM2/MDM4 family protein binding / Maturation of protein E / Mitotic Prometaphase / ER Quality Control Compartment (ERQC) / EML4 and NUDC in mitotic spindle formation Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||
Authors | Ameismeier M / Zemp I | |||||||||
| Funding support | Germany, 1 items
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Citation | Journal: Nature / Year: 2020Title: Structural basis for the final steps of human 40S ribosome maturation. Authors: Michael Ameismeier / Ivo Zemp / Jasmin van den Heuvel / Matthias Thoms / Otto Berninghausen / Ulrike Kutay / Roland Beckmann / ![]() Abstract: Eukaryotic ribosomes consist of a small 40S and a large 60S subunit that are assembled in a highly coordinated manner. More than 200 factors ensure correct modification, processing and folding of ...Eukaryotic ribosomes consist of a small 40S and a large 60S subunit that are assembled in a highly coordinated manner. More than 200 factors ensure correct modification, processing and folding of ribosomal RNA and the timely incorporation of ribosomal proteins. Small subunit maturation ends in the cytosol, when the final rRNA precursor, 18S-E, is cleaved at site 3 by the endonuclease NOB1. Previous structures of human 40S precursors have shown that NOB1 is kept in an inactive state by its partner PNO1. The final maturation events, including the activation of NOB1 for the decisive rRNA-cleavage step and the mechanisms driving the dissociation of the last biogenesis factors have, however, remained unresolved. Here we report five cryo-electron microscopy structures of human 40S subunit precursors, which describe the compositional and conformational progression during the final steps of 40S assembly. Our structures explain the central role of RIOK1 in the displacement and dissociation of PNO1, which in turn allows conformational changes and activation of the endonuclease NOB1. In addition, we observe two factors, eukaryotic translation initiation factor 1A domain-containing protein (EIF1AD) and leucine-rich repeat-containing protein 47 (LRRC47), which bind to late pre-40S particles near RIOK1 and the central rRNA helix 44. Finally, functional data shows that EIF1AD is required for efficient assembly factor recycling and 18S-E processing. Our results thus enable a detailed understanding of the last steps in 40S formation in human cells and, in addition, provide evidence for principal differences in small ribosomal subunit formation between humans and the model organism Saccharomyces cerevisiae. | |||||||||
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Structure visualization
| Movie |
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
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Downloads & links
-EMDB archive
| Map data | emd_11519.map.gz | 104.8 MB | EMDB map data format | |
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| Header (meta data) | emd-11519-v30.xml emd-11519.xml | 55.2 KB 55.2 KB | Display Display | EMDB header |
| Images | emd_11519.png | 156.7 KB | ||
| Masks | emd_11519_msk_1.map | 178 MB | Mask map | |
| Filedesc metadata | emd-11519.cif.gz | 11.9 KB | ||
| Others | emd_11519_additional_1.map.gz emd_11519_half_map_1.map.gz emd_11519_half_map_2.map.gz | 166.3 MB 140.8 MB 140.8 MB | ||
| Archive directory | https://data.pdbj.org/pub/emdb/structures/EMD-11519 ftp://data.pdbj.org/pub/emdb/structures/EMD-11519 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 6zxfMC ![]() 6zxdC ![]() 6zxeC ![]() 6zxgC ![]() 6zxhC M: atomic model generated by this map C: citing same article ( |
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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_11519.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: 1.084 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_11519_msk_1.map | ||||||||||||
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-Additional map: #1
| File | emd_11519_additional_1.map | ||||||||||||
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-Half map: #2
| File | emd_11519_half_map_1.map | ||||||||||||
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-Half map: #1
| File | emd_11519_half_map_2.map | ||||||||||||
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Sample components
+Entire : Cryo-EM structure of a late human pre-40S ribosomal subunit - State G
+Supramolecule #1: Cryo-EM structure of a late human pre-40S ribosomal subunit - State G
+Macromolecule #1: pre-18S ribosomal RNA
+Macromolecule #2: 40S ribosomal protein SA
+Macromolecule #3: 40S ribosomal protein S3a
+Macromolecule #4: 40S ribosomal protein S2
+Macromolecule #5: 40S ribosomal protein S4, X isoform
+Macromolecule #6: 40S ribosomal protein S3
+Macromolecule #7: 40S ribosomal protein S6
+Macromolecule #8: 40S ribosomal protein S7
+Macromolecule #9: 40S ribosomal protein S8
+Macromolecule #10: 40S ribosomal protein S9
+Macromolecule #11: 40S ribosomal protein S5
+Macromolecule #12: 40S ribosomal protein S11
+Macromolecule #13: 40S ribosomal protein S10
+Macromolecule #14: 40S ribosomal protein S13
+Macromolecule #15: 40S ribosomal protein S14
+Macromolecule #16: 40S ribosomal protein S12
+Macromolecule #17: 40S ribosomal protein S15
+Macromolecule #18: 40S ribosomal protein S17
+Macromolecule #19: 40S ribosomal protein S16
+Macromolecule #20: 40S ribosomal protein S18
+Macromolecule #21: 40S ribosomal protein S19
+Macromolecule #22: 40S ribosomal protein S21
+Macromolecule #23: 40S ribosomal protein S15a
+Macromolecule #24: 40S ribosomal protein S23
+Macromolecule #25: 40S ribosomal protein S24
+Macromolecule #26: 40S ribosomal protein S20
+Macromolecule #27: 40S ribosomal protein S25
+Macromolecule #28: 40S ribosomal protein S27
+Macromolecule #29: 40S ribosomal protein S28
+Macromolecule #30: 40S ribosomal protein S29
+Macromolecule #31: 40S ribosomal protein S30
+Macromolecule #32: Ubiquitin-40S ribosomal protein S27a
+Macromolecule #33: Receptor of activated protein C kinase 1
+Macromolecule #34: Probable RNA-binding protein EIF1AD
+Macromolecule #35: Serine/threonine-protein kinase RIO1
+Macromolecule #36: RNA-binding protein NOB1
+Macromolecule #37: Leucine-rich repeat-containing protein 47
+Macromolecule #38: ZINC ION
+Macromolecule #39: MAGNESIUM ION
+Macromolecule #40: ADENOSINE-5'-TRIPHOSPHATE
-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: 7.6 |
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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: FEI FALCON II (4k x 4k) / 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
| Startup model | #0 - Type of model: PDB ENTRY #0 - PDB model - PDB ID: #1 - Type of model: PDB ENTRY #1 - PDB model - PDB ID: |
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| Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 140612 |
| Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
| Final angle assignment | Type: MAXIMUM LIKELIHOOD |
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About Yorodumi


Keywords
Homo sapiens (human)
Authors
Germany, 1 items
Citation
UCSF Chimera




















































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Y (Row.)
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