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Yorodumi- PDB-7wtt: Cryo-EM structure of a human pre-40S ribosomal subunit - State RR... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 7wtt | ||||||
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| Title | Cryo-EM structure of a human pre-40S ribosomal subunit - State RRP12-A1 (with CK1) | ||||||
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Keywords | RIBOSOME / ribosome biogenesis / 40S ribosome | ||||||
| Function / homology | Function and homology informationtRNA (m2G10) methyltransferase complex / tRNA methyltransferase activator activity / peptidyl-glutamine methylation / regulation of protein localization to nucleolus / rRNA (guanine-N7)-methylation / rRNA (guanine) methyltransferase activity / intermediate filament cytoskeleton organization / Activation of SMO / tRNA modification in the nucleus and cytosol / trophectodermal cell differentiation ...tRNA (m2G10) methyltransferase complex / tRNA methyltransferase activator activity / peptidyl-glutamine methylation / regulation of protein localization to nucleolus / rRNA (guanine-N7)-methylation / rRNA (guanine) methyltransferase activity / intermediate filament cytoskeleton organization / Activation of SMO / tRNA modification in the nucleus and cytosol / trophectodermal cell differentiation / Methylation / negative regulation of NLRP3 inflammasome complex assembly / protein methyltransferase activity / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / tRNA methylation / cellular response to nutrient / positive regulation of rRNA processing / beta-catenin destruction complex / APC truncation mutants have impaired AXIN binding / AXIN missense mutants destabilize the destruction complex / Truncations of AMER1 destabilize the destruction complex / Beta-catenin phosphorylation cascade / Signaling by GSK3beta mutants / CTNNB1 S33 mutants aren't phosphorylated / CTNNB1 S37 mutants aren't phosphorylated / CTNNB1 S45 mutants aren't phosphorylated / CTNNB1 T41 mutants aren't phosphorylated / rRNA methylation / Disassembly of the destruction complex and recruitment of AXIN to the membrane / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / Maturation of nucleoprotein / negative regulation of RNA splicing / U3 snoRNA binding / neural crest cell differentiation / snoRNA binding / preribosome, small subunit precursor / rRNA modification in the nucleus and cytosol / negative regulation of bicellular tight junction assembly / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / Formation of the ternary complex, and subsequently, the 43S complex / Golgi organization / positive regulation of Rho protein signal transduction / Ribosomal scanning and start codon recognition / Translation initiation complex formation / fibroblast growth factor binding / Protein hydroxylation / monocyte chemotaxis / TOR signaling / mTORC1-mediated signalling / SARS-CoV-1 modulates host translation machinery / cellular response to ethanol / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / Eukaryotic Translation Termination / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / negative regulation of respiratory burst involved in inflammatory response / ubiquitin ligase inhibitor activity / 90S preribosome / Viral mRNA Translation / negative regulation of ubiquitin-dependent protein catabolic process / 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 / Major pathway of rRNA processing in the nucleolus and cytosol / regulation of translational fidelity / maturation of LSU-rRNA / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / Nuclear events stimulated by ALK signaling in cancer / rough endoplasmic reticulum / positive regulation of cell cycle / ribosomal small subunit export from nucleus / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / positive regulation of TORC1 signaling / Maturation of protein E / translation initiation factor binding / Maturation of protein E / MDM2/MDM4 family protein binding / ER Quality Control Compartment (ERQC) / Myoclonic epilepsy of Lafora / Mitotic Prometaphase / FLT3 signaling by CBL mutants / liver regeneration / IRAK2 mediated activation of TAK1 complex / Alpha-protein kinase 1 signaling pathway / EML4 and NUDC in mitotic spindle formation / Glycogen synthesis / IRAK1 recruits IKK complex / IRAK1 recruits IKK complex upon TLR7/8 or 9 stimulation / Prevention of phagosomal-lysosomal fusion / Endosomal Sorting Complex Required For Transport (ESCRT) / Membrane binding and targetting of GAG proteins / Regulation of TBK1, IKKε (IKBKE)-mediated activation of IRF3, IRF7 / Negative regulation of FLT3 / PTK6 Regulates RTKs and Their Effectors AKT1 and DOK1 Similarity search - Function | ||||||
| Biological species | Homo sapiens (human) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.1 Å | ||||||
Authors | Cheng, J. / Lau, B. / Thoms, M. / Ameismeier, M. / Berninghausen, O. / Hurt, E. / Beckmann, R. | ||||||
| Funding support | 1items
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Citation | Journal: Nucleic Acids Res / Year: 2022Title: The nucleoplasmic phase of pre-40S formation prior to nuclear export. Authors: Jingdong Cheng / Benjamin Lau / Matthias Thoms / Michael Ameismeier / Otto Berninghausen / Ed Hurt / Roland Beckmann / ![]() Abstract: Biogenesis of the small ribosomal subunit in eukaryotes starts in the nucleolus with the formation of a 90S precursor and ends in the cytoplasm. Here, we elucidate the enigmatic structural ...Biogenesis of the small ribosomal subunit in eukaryotes starts in the nucleolus with the formation of a 90S precursor and ends in the cytoplasm. Here, we elucidate the enigmatic structural transitions of assembly intermediates from human and yeast cells during the nucleoplasmic maturation phase. After dissociation of all 90S factors, the 40S body adopts a close-to-mature conformation, whereas the 3' major domain, later forming the 40S head, remains entirely immature. A first coordination is facilitated by the assembly factors TSR1 and BUD23-TRMT112, followed by re-positioning of RRP12 that is already recruited early to the 90S for further head rearrangements. Eventually, the uS2 cluster, CK1 (Hrr25 in yeast) and the export factor SLX9 associate with the pre-40S to provide export competence. These exemplary findings reveal the evolutionary conserved mechanism of how yeast and humans assemble the 40S ribosomal subunit, but reveal also a few minor differences. | ||||||
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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 | 7wtt.cif.gz | 1.9 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb7wtt.ent.gz | 1.4 MB | Display | PDB format |
| PDBx/mmJSON format | 7wtt.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/wt/7wtt ftp://data.pdbj.org/pub/pdb/validation_reports/wt/7wtt | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 32800MC ![]() 7wtnC ![]() 7wtoC ![]() 7wtpC ![]() 7wtqC ![]() 7wtrC ![]() 7wtsC ![]() 7wtuC ![]() 7wtvC ![]() 7wtwC ![]() 7wtxC ![]() 7wtzC ![]() 7wu0C M: map data used to model this data C: citing same article ( |
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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
-RNA chain , 1 types, 1 molecules 2
| #1: RNA chain | Mass: 604117.750 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
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+40S ribosomal protein ... , 23 types, 23 molecules RbBcEeFHGZYXWTSQPONLJIM
-Protein , 10 types, 10 molecules xwutrqKfaz
| #13: Protein | Mass: 27970.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9NRX1 |
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| #15: Protein | Mass: 49673.258 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q13895 |
| #17: Protein | Mass: 91951.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q2NL82 |
| #18: Protein | Mass: 54935.891 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q96GA3 |
| #28: Protein | Mass: 14215.359 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9UI30 |
| #29: Protein | Mass: 31925.428 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)References: UniProt: O43709, Transferases; Transferring one-carbon groups; Methyltransferases |
| #30: Protein | Mass: 143916.516 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q5JTH9 |
| #32: Protein | Mass: 18004.041 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62979 |
| #33: Protein | Mass: 38944.750 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)References: UniProt: P48729, non-specific serine/threonine protein kinase |
| #34: Protein | Mass: 25503.346 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9NSI2 |
-Non-polymers , 2 types, 2 molecules 


| #35: Chemical | ChemComp-SAH / |
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| #36: Chemical | ChemComp-ZN / |
-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: Yeast pre-40S ribosomal subunit / Type: RIBOSOME / Entity ID: #1-#34 / Source: NATURAL |
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| Source (natural) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.4 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Vitrification | Cryogen name: ETHANE |
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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: 2500 nm / Nominal defocus min: 800 nm |
| Image recording | Electron dose: 44 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
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| CTF correction | Details: Relion / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 103616 / Symmetry type: POINT | ||||||||||||||||||||||||
| Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
| Displacement parameters | Biso mean: 14.85 Å2 | ||||||||||||||||||||||||
| Refine LS restraints |
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