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Yorodumi- PDB-7r4x: Cryo-EM reconstruction of the human 40S ribosomal subunit - Full map -
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Open data
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Basic information
| Entry | Database: PDB / ID: 7r4x | |||||||||||||||
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| Title | Cryo-EM reconstruction of the human 40S ribosomal subunit - Full map | |||||||||||||||
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Keywords | RIBOSOME / rRNA modifications / post-translational modifications / cryo-EM | |||||||||||||||
| Function / homology | Function and homology informationoxidized pyrimidine DNA binding / response to TNF agonist / negative regulation of endoplasmic reticulum unfolded protein response / positive regulation of base-excision repair / positive regulation of respiratory burst involved in inflammatory response / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / positive regulation of endodeoxyribonuclease activity / nucleolus organization ...oxidized pyrimidine DNA binding / response to TNF agonist / negative regulation of endoplasmic reticulum unfolded protein response / positive regulation of base-excision repair / positive regulation of respiratory burst involved in inflammatory response / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / positive regulation of endodeoxyribonuclease activity / nucleolus organization / IRE1-RACK1-PP2A complex / positive regulation of Golgi to plasma membrane protein transport / TNFR1-mediated ceramide production / negative regulation of DNA repair / negative regulation of RNA splicing / supercoiled DNA binding / NF-kappaB complex / neural crest cell differentiation / oxidized purine DNA binding / cysteine-type endopeptidase activator activity involved in apoptotic process / positive regulation of ubiquitin-protein transferase activity / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / negative regulation of bicellular tight junction assembly / regulation of establishment of cell polarity / ubiquitin-like protein conjugating enzyme binding / rRNA modification in the nucleus and cytosol / negative regulation of phagocytosis / erythrocyte homeostasis / Formation of the ternary complex, and subsequently, the 43S complex / cytoplasmic side of rough endoplasmic reticulum membrane / negative regulation of ubiquitin protein ligase activity / protein kinase A binding / laminin receptor activity / ion channel inhibitor activity / Ribosomal scanning and start codon recognition / pigmentation / Translation initiation complex formation / positive regulation of mitochondrial depolarization / positive regulation of T cell receptor signaling pathway / fibroblast growth factor binding / negative regulation of Wnt signaling pathway / monocyte chemotaxis / TOR signaling / negative regulation of translational frameshifting / BH3 domain binding / positive regulation of activated T cell proliferation / Protein hydroxylation / SARS-CoV-1 modulates host translation machinery / iron-sulfur cluster binding / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / regulation of cell division / cellular response to ethanol / mTORC1-mediated signalling / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Eukaryotic Translation Termination / positive regulation of GTPase activity / negative regulation of ubiquitin-dependent protein catabolic process / protein serine/threonine kinase inhibitor activity / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / ubiquitin ligase inhibitor activity / Viral mRNA Translation / negative regulation of respiratory burst involved in inflammatory response / positive regulation of signal transduction by p53 class mediator / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / Major pathway of rRNA processing in the nucleolus and cytosol / regulation of translational fidelity / phagocytic cup / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of protein binding / Protein methylation / positive regulation of intrinsic apoptotic signaling pathway / spindle assembly / Nuclear events stimulated by ALK signaling in cancer / positive regulation of cell cycle / laminin binding / 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) / rough endoplasmic reticulum / translation regulator activity / ribosomal small subunit export from nucleus / translation initiation factor binding / gastrulation / Maturation of protein E / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / Maturation of protein E / DNA-(apurinic or apyrimidinic site) endonuclease activity / ER Quality Control Compartment (ERQC) / positive regulation of microtubule polymerization / signaling adaptor activity / MDM2/MDM4 family protein binding / Myoclonic epilepsy of Lafora / FLT3 signaling by CBL mutants / Constitutive Signaling by NOTCH1 HD Domain Mutants / IRAK2 mediated activation of TAK1 complex Similarity search - Function | |||||||||||||||
| Biological species | Homo sapiens (human) | |||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.15 Å | |||||||||||||||
Authors | Pellegrino, S. / Dent, K.C. / Spikes, T. / Warren, A.J. | |||||||||||||||
| Funding support | United Kingdom, 4items
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Citation | Journal: Nucleic Acids Res / Year: 2023Title: Cryo-EM reconstruction of the human 40S ribosomal subunit at 2.15 Å resolution. Authors: Simone Pellegrino / Kyle C Dent / Tobias Spikes / Alan J Warren / ![]() Abstract: The chemical modification of ribosomal RNA and proteins is critical for ribosome assembly, for protein synthesis and may drive ribosome specialisation in development and disease. However, the ...The chemical modification of ribosomal RNA and proteins is critical for ribosome assembly, for protein synthesis and may drive ribosome specialisation in development and disease. However, the inability to accurately visualise these modifications has limited mechanistic understanding of the role of these modifications in ribosome function. Here we report the 2.15 Å resolution cryo-EM reconstruction of the human 40S ribosomal subunit. We directly visualise post-transcriptional modifications within the 18S rRNA and four post-translational modifications of ribosomal proteins. Additionally, we interpret the solvation shells in the core regions of the 40S ribosomal subunit and reveal how potassium and magnesium ions establish both universally conserved and eukaryote-specific coordination to promote the stabilisation and folding of key ribosomal elements. This work provides unprecedented structural details for the human 40S ribosomal subunit that will serve as an important reference for unravelling the functional role of ribosomal RNA modifications. | |||||||||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7r4x.cif.gz | 1.8 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb7r4x.ent.gz | 1.4 MB | Display | PDB format |
| PDBx/mmJSON format | 7r4x.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/r4/7r4x ftp://data.pdbj.org/pub/pdb/validation_reports/r4/7r4x | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 14317MC C: citing same article ( M: map data used to model this data |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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Components
+40S ribosomal protein ... , 31 types, 31 molecules BDEFHIKLPQRSTUVXacdCGJMNOWYZbeA
-Protein , 2 types, 2 molecules fg
| #33: Protein | Mass: 18004.041 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62979 |
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| #34: Protein | Mass: 35115.652 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P63244 |
-Protein/peptide / RNA chain , 2 types, 2 molecules n2
| #1: Protein/peptide | Mass: 3473.451 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62945 |
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| #2: RNA chain | Mass: 603183.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
-Non-polymers , 4 types, 4290 molecules 






| #36: Chemical | ChemComp-K / #37: Chemical | ChemComp-MG / #38: Chemical | #39: Water | ChemComp-HOH / | |
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-Details
| Has ligand of interest | N |
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-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: Human 40S ribosomal subunit / Type: RIBOSOME / Entity ID: #1-#35 / Source: NATURAL |
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| Source (natural) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.5 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2 |
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2800 nm / Nominal defocus min: 1000 nm |
| Image recording | Electron dose: 40.56 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
| EM software |
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||
| Particle selection | Num. of particles selected: 546717 | ||||||||||||||||||
| 3D reconstruction | Resolution: 2.15 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 474276 / Symmetry type: POINT |
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About Yorodumi



Homo sapiens (human)
United Kingdom, 4items
Citation


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FIELD EMISSION GUN