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Yorodumi- PDB-6lqs: Cryo-EM structure of 90S small subunit preribosomes in transition... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 6lqs | |||||||||
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| Title | Cryo-EM structure of 90S small subunit preribosomes in transition states (State D) | |||||||||
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Keywords | RIBOSOME / ribosome assembly / 90S to pre-40S transition / cryo-EM / Dhr1 | |||||||||
| Function / homology | Function and homology informationnuclear mRNA surveillance of spliceosomal pre-mRNA splicing / mRNA decay by 3' to 5' exoribonuclease / Butyrate Response Factor 1 (BRF1) binds and destabilizes mRNA / Tristetraprolin (TTP, ZFP36) binds and destabilizes mRNA / TRAMP complex / nuclear mRNA surveillance of mRNA 3'-end processing / regulatory ncRNA 3'-end processing / nuclear polyadenylation-dependent antisense transcript catabolic process / nuclear polyadenylation-dependent snoRNA catabolic process / nuclear polyadenylation-dependent snRNA catabolic process ...nuclear mRNA surveillance of spliceosomal pre-mRNA splicing / mRNA decay by 3' to 5' exoribonuclease / Butyrate Response Factor 1 (BRF1) binds and destabilizes mRNA / Tristetraprolin (TTP, ZFP36) binds and destabilizes mRNA / TRAMP complex / nuclear mRNA surveillance of mRNA 3'-end processing / regulatory ncRNA 3'-end processing / nuclear polyadenylation-dependent antisense transcript catabolic process / nuclear polyadenylation-dependent snoRNA catabolic process / nuclear polyadenylation-dependent snRNA catabolic process / nuclear polyadenylation-dependent mRNA catabolic process / CUT catabolic process / regulation of ribosomal protein gene transcription by RNA polymerase II / cytoplasmic exosome (RNase complex) / U1 snRNA 3'-end processing / box H/ACA snoRNA binding / nuclear polyadenylation-dependent CUT catabolic process / U5 snRNA 3'-end processing / TRAMP-dependent tRNA surveillance pathway / RNA fragment catabolic process / exosome (RNase complex) / rRNA small subunit pseudouridine methyltransferase Nep1 / CURI complex / UTP-C complex / nuclear-transcribed mRNA catabolic process, non-stop decay / rRNA 2'-O-methylation / Noc4p-Nop14p complex / endonucleolytic cleavage in ITS1 upstream of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / U4 snRNA 3'-end processing / nuclear polyadenylation-dependent rRNA catabolic process / poly(A)-dependent snoRNA 3'-end processing / t-UTP complex / nuclear-transcribed mRNA catabolic process, 3'-5' exonucleolytic nonsense-mediated decay / nuclear exosome (RNase complex) / Pwp2p-containing subcomplex of 90S preribosome / nuclear microtubule / Mpp10 complex / rRNA (pseudouridine) methyltransferase activity / exonucleolytic trimming to generate mature 3'-end of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / box C/D sno(s)RNA binding / snoRNA guided rRNA 2'-O-methylation / rRNA modification / histone H2AQ104 methyltransferase activity / septum digestion after cytokinesis / regulation of rRNA processing / 3'-5' RNA helicase activity / tRNA re-export from nucleus / snRNA binding / histone mRNA catabolic process / RNA folding chaperone / box C/D sno(s)RNA 3'-end processing / nuclear mRNA surveillance / rRNA catabolic process / 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) / post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery / 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 / poly(A) binding / single-stranded telomeric DNA binding / mRNA 3'-UTR AU-rich region binding / rRNA primary transcript binding / sno(s)RNA-containing ribonucleoprotein complex / Negative regulators of DDX58/IFIH1 signaling / rRNA base methylation / O-methyltransferase activity / U4 snRNA binding / SUMOylation of RNA binding proteins / protein localization to nucleolus / 90S preribosome assembly / Hydrolases; Acting on ester bonds; Endoribonucleases producing 5'-phosphomonoesters / RNA catabolic process / mTORC1-mediated signalling / rRNA methylation / Protein hydroxylation / regulation of telomere maintenance / U4 snRNP / poly(U) RNA binding / U3 snoRNA binding / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / maturation of 5.8S rRNA / nonfunctional rRNA 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 / rRNA metabolic process / Major pathway of rRNA processing in the nucleolus and cytosol / establishment of cell polarity / mRNA catabolic process / spliceosomal complex assembly Similarity search - Function | |||||||||
| Biological species | ![]() ![]() | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å | |||||||||
Authors | Du, Y. / Ye, K. | |||||||||
| Funding support | China, 2items
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Citation | Journal: Science / Year: 2020Title: Cryo-EM structure of 90 small ribosomal subunit precursors in transition states. Authors: Yifei Du / Weidong An / Xing Zhu / Qi Sun / Jia Qi / Keqiong Ye / ![]() Abstract: The 90 preribosome is a large, early assembly intermediate of small ribosomal subunits that undergoes structural changes to give a pre-40 ribosome. Here, we gained insight into this transition by ...The 90 preribosome is a large, early assembly intermediate of small ribosomal subunits that undergoes structural changes to give a pre-40 ribosome. Here, we gained insight into this transition by determining cryo-electron microscopy structures of intermediates in the path from the 90 to the pre-40 The full transition is blocked by deletion of RNA helicase Dhr1. A series of structural snapshots revealed that the excised 5' external transcribed spacer (5' ETS) is degraded within 90, driving stepwise disassembly of assembly factors and ribosome maturation. The nuclear exosome, an RNA degradation machine, docks on the 90 through helicase Mtr4 and is primed to digest the 3' end of the 5' ETS. The structures resolved between 3.2- and 8.6-angstrom resolution reveal key intermediates and the critical role of 5' ETS degradation in 90 progression. | |||||||||
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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 | 6lqs.cif.gz | 5.4 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb6lqs.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 6lqs.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 6lqs_validation.pdf.gz | 1.9 MB | Display | wwPDB validaton report |
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| Full document | 6lqs_full_validation.pdf.gz | 2.3 MB | Display | |
| Data in XML | 6lqs_validation.xml.gz | 653.8 KB | Display | |
| Data in CIF | 6lqs_validation.cif.gz | 1.1 MB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/lq/6lqs ftp://data.pdbj.org/pub/pdb/validation_reports/lq/6lqs | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 0952MC ![]() 0949C ![]() 0950C ![]() 0951C ![]() 0953C ![]() 0954C ![]() 0955C ![]() 6lqpC ![]() 6lqqC ![]() 6lqrC ![]() 6lqtC ![]() 6lquC ![]() 6lqvC 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
+RNA chain , 3 types, 3 molecules 3A5ASA
+40S ribosomal protein ... , 16 types, 16 molecules SCSFSGSHSISJSKSMSOSPSRSXSYSZScSd
+Protein , 17 types, 20 molecules 3B3C3G3HAGB15B5H5IRDRGRHRJRKRSRTRWR7M4M6
+Nucleolar protein ... , 2 types, 2 molecules 3D3E
+Ribosomal RNA-processing protein ... , 2 types, 2 molecules 3FRF
+U3 small nucleolar RNA-associated protein ... , 17 types, 17 molecules A4A5A8A9AEAFB2B3B8BEB65C5D5ERERPRQ
+U3 small nucleolar ribonucleoprotein protein ... , 2 types, 2 molecules 5F5G
+RRNA-processing protein ... , 2 types, 2 molecules 5J5K
+Nucleolar complex protein ... , 2 types, 2 molecules RNRO
+Unassigned helices ... , 2 types, 2 molecules X1X2
+Exosome complex component ... , 9 types, 9 molecules R5R1R3R6R2M3R0r4C4
+Exosome complex exonuclease ... , 2 types, 2 molecules R4r6
+Non-polymers , 3 types, 4 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 (Dhr1-depleted, state D) / Type: COMPLEX / Entity ID: #1-#76 / Source: NATURAL | |||||||||||||||
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| Molecular weight | Value: 5 MDa / Experimental value: NO | |||||||||||||||
| Source (natural) | Organism: ![]() | |||||||||||||||
| Buffer solution | pH: 7.4 | |||||||||||||||
| Buffer component |
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| Specimen | Conc.: 2 mg/ml / 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 R1.2/1.3 | |||||||||||||||
| 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: 2500 nm / Nominal defocus min: 1500 nm / Cs: 2.7 mm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Electron dose: 50 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 10 / Num. of real images: 18028 |
| Image scans | Movie frames/image: 32 / Used frames/image: 1-32 |
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 382298 | ||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 75404 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
| Atomic model building | PDB-ID: 6LQP Accession code: 6LQP / Source name: PDB / Type: experimental model |
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China, 2items
Citation
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