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Yorodumi- PDB-6zqb: Cryo-EM structure of the 90S pre-ribosome from Saccharomyces cere... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 6zqb | ||||||
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| Title | Cryo-EM structure of the 90S pre-ribosome from Saccharomyces cerevisiae, state B2 | ||||||
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Keywords | RIBOSOME / 90S pre-ribosome / 40S pre-ribosome / A1 cleavage / Dhr1 | ||||||
| Function / homology | Function and homology informationtRNA wobble cytosine modification / tRNA cytidine N4-acetyltransferase activity / rRNA acetylation involved in maturation of SSU-rRNA / 18S rRNA cytidine N-acetyltransferase activity / regulation of ribosomal protein gene transcription by RNA polymerase II / tRNA acetylation / RNA fragment catabolic process / rRNA small subunit pseudouridine methyltransferase Nep1 / CURI complex / UTP-C complex ...tRNA wobble cytosine modification / tRNA cytidine N4-acetyltransferase activity / rRNA acetylation involved in maturation of SSU-rRNA / 18S rRNA cytidine N-acetyltransferase activity / regulation of ribosomal protein gene transcription by RNA polymerase II / tRNA acetylation / RNA fragment catabolic process / rRNA small subunit pseudouridine methyltransferase Nep1 / CURI complex / UTP-C complex / rRNA 2'-O-methylation / Noc4p-Nop14p complex / t-UTP complex / Pwp2p-containing subcomplex of 90S preribosome / nuclear microtubule / Mpp10 complex / rRNA (pseudouridine) methyltransferase activity / snoRNA guided rRNA 2'-O-methylation / rRNA modification / histone H2AQ104 methyltransferase activity / septum digestion after cytokinesis / regulation of rRNA processing / tRNA re-export from nucleus / snRNA binding / RNA folding chaperone / box C/D sno(s)RNA 3'-end processing / rRNA methyltransferase activity / rDNA heterochromatin / 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) / regulation of transcription by RNA polymerase I / endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / box C/D methylation guide snoRNP complex / U4/U6 snRNP / positive regulation of rRNA processing / tRNA export from nucleus / single-stranded telomeric DNA binding / rRNA primary transcript binding / small nuclear ribonucleoprotein complex / sno(s)RNA-containing ribonucleoprotein complex / Negative regulators of DDX58/IFIH1 signaling / rRNA base methylation / U4 snRNA binding / O-methyltransferase activity / SUMOylation of RNA binding proteins / protein localization to nucleolus / mTORC1-mediated signalling / mRNA modification / rRNA methylation / Protein hydroxylation / U4 snRNP / U3 snoRNA binding / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / Formation of the ternary complex, and subsequently, the 43S complex / poly(A)+ mRNA export from nucleus / Translation initiation complex formation / Ribosomal scanning and start codon recognition / snoRNA binding / precatalytic spliceosome / preribosome, small subunit precursor / Major pathway of rRNA processing in the nucleolus and cytosol / establishment of cell polarity / spliceosomal complex assembly / positive regulation of transcription by RNA polymerase I / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / nucleolar large rRNA transcription by RNA polymerase I / 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 / RNA processing / regulation of translational fidelity / ribosomal subunit export from nucleus / U4/U6 x U5 tri-snRNP complex / 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) / ribosomal small subunit export from nucleus / vesicle-mediated transport / Transferases; Acyltransferases; Transferring groups other than aminoacyl groups / RNA endonuclease activity / nuclear periphery / Transferases; Transferring one-carbon groups; Methyltransferases / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosome assembly / maturation of SSU-rRNA / spliceosomal complex / small-subunit processome / translational initiation / enzyme activator activity / mRNA splicing, via spliceosome / maintenance of translational fidelity / rRNA processing / unfolded protein binding / peroxisome / protein transport / ribosome biogenesis / ribosomal small subunit biogenesis Similarity search - Function | ||||||
| Biological species | ![]() ![]() | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å | ||||||
Authors | Cheng, J. / Lau, B. / Venuta, G.L. / Berninghausen, O. / Hurt, E. / Beckmann, R. | ||||||
Citation | Journal: Science / Year: 2020Title: 90 pre-ribosome transformation into the primordial 40 subunit. Authors: Jingdong Cheng / Benjamin Lau / Giuseppe La Venuta / Michael Ameismeier / Otto Berninghausen / Ed Hurt / Roland Beckmann / ![]() Abstract: Production of small ribosomal subunits initially requires the formation of a 90 precursor followed by an enigmatic process of restructuring into the primordial pre-40 subunit. We elucidate this ...Production of small ribosomal subunits initially requires the formation of a 90 precursor followed by an enigmatic process of restructuring into the primordial pre-40 subunit. We elucidate this process by biochemical and cryo-electron microscopy analysis of intermediates along this pathway in yeast. First, the remodeling RNA helicase Dhr1 engages the 90 pre-ribosome, followed by Utp24 endonuclease-driven RNA cleavage at site A, thereby separating the 5'-external transcribed spacer (ETS) from 18 ribosomal RNA. Next, the 5'-ETS and 90 assembly factors become dislodged, but this occurs sequentially, not en bloc. Eventually, the primordial pre-40 emerges, still retaining some 90 factors including Dhr1, now ready to unwind the final small nucleolar U3-18 RNA hybrid. Our data shed light on the elusive 90 to pre-40 transition and clarify the principles of assembly and remodeling of large ribonucleoproteins. | ||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 6zqb.cif.gz | 5.2 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb6zqb.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 6zqb.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 6zqb_validation.pdf.gz | 1.7 MB | Display | wwPDB validaton report |
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| Full document | 6zqb_full_validation.pdf.gz | 2.5 MB | Display | |
| Data in XML | 6zqb_validation.xml.gz | 643.6 KB | Display | |
| Data in CIF | 6zqb_validation.cif.gz | 1 MB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/zq/6zqb ftp://data.pdbj.org/pub/pdb/validation_reports/zq/6zqb | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 11358MC ![]() 6zqaC ![]() 6zqcC ![]() 6zqdC ![]() 6zqeC ![]() 6zqfC ![]() 6zqgC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Links
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Assembly
| Deposited unit | ![]()
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Components
+Protein , 17 types, 21 molecules UAUCUPUQCACBCFCGCMJAJBJFJGJHJJJKJNJOJPJQDF
+Nucleolar complex protein ... , 2 types, 2 molecules UBUS
+U3 small nucleolar RNA-associated protein ... , 17 types, 17 molecules UDUEUFUGUHUIUJUKULUMUNUOURUTUUUVCK
+RRNA-processing protein ... , 2 types, 2 molecules UXJM
+Ribosome biogenesis protein ... , 3 types, 3 molecules UZCLJC
+Nucleolar protein ... , 2 types, 2 molecules CDCE
+Ribosomal RNA-processing protein ... , 2 types, 2 molecules CHCN
+U3 small nucleolar ribonucleoprotein protein ... , 3 types, 3 molecules CICJJE
+40S ribosomal protein ... , 16 types, 16 molecules DADEDGDHDIDJDLDNDODQDSDWDXDYDbDc
+RNA chain , 3 types, 3 molecules D2D3D4
+Non-polymers , 2 types, 3 molecules 


+Details
-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: 90S pre-ribosome state B2 / Type: RIBOSOME / Entity ID: #1-#67 / Source: NATURAL |
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| Source (natural) | Organism: ![]() |
| 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 |
| Image recording | Electron dose: 44 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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| 3D reconstruction | Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 32213 / Symmetry type: POINT |
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