+
Open data
-
Basic information
| Entry | Database: PDB / ID: 9g33 | ||||||
|---|---|---|---|---|---|---|---|
| Title | Stalled 90S - Utp23-Krr1-deltaC3 | ||||||
Components |
| ||||||
Keywords | RIBOSOME / 90S / pre-ribosome / snoRNA / snR30 / snoRNP / ribosome biogenesis / H/ACA / 18S rRNA | ||||||
| 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 / tRNA acetylation / RNA fragment catabolic process / rRNA small subunit pseudouridine methyltransferase Nep1 / rRNA 2'-O-methylation / Noc4p-Nop14p complex / t-UTP complex ...tRNA wobble cytosine modification / tRNA cytidine N4-acetyltransferase activity / rRNA acetylation involved in maturation of SSU-rRNA / 18S rRNA cytidine N-acetyltransferase activity / tRNA acetylation / RNA fragment catabolic process / rRNA small subunit pseudouridine methyltransferase Nep1 / rRNA 2'-O-methylation / Noc4p-Nop14p complex / t-UTP complex / Pwp2p-containing subcomplex of 90S preribosome / Mpp10 complex / nuclear microtubule / rRNA (pseudouridine) methyltransferase activity / snoRNA guided rRNA 2'-O-methylation / rRNA modification / histone H2AQ104 methyltransferase activity / septum digestion after cytokinesis / tRNA re-export from nucleus / snRNA binding / box C/D sno(s)RNA 3'-end processing / rRNA methyltransferase activity / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage in 5'-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / regulation of rRNA processing / 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) / RNA folding chaperone / box C/D methylation guide snoRNP complex / rDNA heterochromatin / U4/U6 snRNP / positive regulation of rRNA processing / tRNA export from nucleus / single-stranded telomeric DNA binding / rRNA primary transcript binding / O-methyltransferase activity / sno(s)RNA-containing ribonucleoprotein complex / small nuclear ribonucleoprotein complex / rRNA base methylation / protein localization to nucleolus / SUMOylation of RNA binding proteins / rRNA methylation / U4 snRNA binding / mTORC1-mediated signalling / Protein hydroxylation / U4 snRNP / mRNA modification / U3 snoRNA binding / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / Ribosomal scanning and start codon recognition / poly(A)+ mRNA export from nucleus / snoRNA binding / preribosome, small subunit precursor / precatalytic spliceosome / Major pathway of rRNA processing in the nucleolus and cytosol / establishment of cell polarity / SRP-dependent cotranslational protein targeting to membrane / positive regulation of transcription by RNA polymerase I / GTP hydrolysis and joining of the 60S ribosomal subunit / Formation of a pool of free 40S subunits / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / spliceosomal complex assembly / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / L13a-mediated translational silencing of Ceruloplasmin expression / 90S preribosome / RNA processing / ribosomal subunit export from nucleus / proteasome assembly / U4/U6 x U5 tri-snRNP complex / regulation of translational fidelity / vesicle-mediated transport / 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 / RNA endonuclease activity / Transferases; Acyltransferases; Transferring groups other than aminoacyl groups / nuclear periphery / Transferases; Transferring one-carbon groups; Methyltransferases / ribosome assembly / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / spliceosomal complex / maturation of SSU-rRNA / translational initiation / small-subunit processome / mRNA splicing, via spliceosome / maintenance of translational fidelity / enzyme activator activity / rRNA processing / : / peroxisome / protein transport / ribosomal small subunit assembly / ribosome biogenesis / ribosomal small subunit biogenesis / small ribosomal subunit / cytosolic small ribosomal subunit / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / cytoplasmic translation / tRNA binding Similarity search - Function | ||||||
| Biological species | ![]() | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.05 Å | ||||||
Authors | Thoms, M. / Berninghausen, O. / Beckmann, R. | ||||||
| Funding support | European Union, 1items
| ||||||
Citation | Journal: Nat Commun / Year: 2025Title: H/ACA snR30 snoRNP guides independent 18S rRNA subdomain formation. Authors: Paulina Fischer / Matthias Thoms / Benjamin Lau / Timo Denk / Maria Kuvshinova / Otto Berninghausen / Dirk Flemming / Ed Hurt / Roland Beckmann / ![]() Abstract: Ribosome biogenesis follows a cascade of pre-rRNA folding and processing steps, coordinated with ribosomal protein incorporation. Nucleolar 90S pre-ribosomes are well-described stable intermediates, ...Ribosome biogenesis follows a cascade of pre-rRNA folding and processing steps, coordinated with ribosomal protein incorporation. Nucleolar 90S pre-ribosomes are well-described stable intermediates, composed of pre-18S rRNA, ribosomal S-proteins, U3 snoRNA, and ~70 assembly factors. However, how numerous snoRNAs control pre-rRNA modification and folding during early maturation events remains unclear. We identify snR30 (human U17), the only essential H/ACA snoRNA in yeast, which binds with Cbf5-Gar1-Nop10-Nhp2 to a pre-18S rRNA subdomain containing platform helices and ES6 of the 40S central domain. Integration into the 90S is blocked by RNA hybridization with snR30. The snoRNP complex coordinates the recruitment of early assembly factors Krr1-Utp23-Kri1 and ribosomal proteins uS11-uS15, enabling isolated subdomain assembly. Krr1-dependent release of snR30 culminates in integration of the platform into the 90S. Our study reveals the essential role of snR30 in chaperoning central domain formation as a discrete assembly unit externalized from the pre-ribosomal core. #1: Journal: Acta Crystallogr., Sect. D: Biol. Crystallogr. / Year: 2018Title: Real-space refinement in PHENIX for cryo-EM and crystallography Authors: Adams, P.D. | ||||||
| History |
|
-
Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
|---|
-
Downloads & links
-
Download
| PDBx/mmCIF format | 9g33.cif.gz | 4.7 MB | Display | PDBx/mmCIF format |
|---|---|---|---|---|
| PDB format | pdb9g33.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 9g33.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/g3/9g33 ftp://data.pdbj.org/pub/pdb/validation_reports/g3/9g33 | HTTPS FTP |
|---|
-Related structure data
| Related structure data | ![]() 50991MC ![]() 9g25C ![]() 9g28C C: citing same article ( M: map data used to model this data |
|---|---|
| Similar structure data | Similarity search - Function & homology F&H Search |
-
Links
-
Assembly
| Deposited unit | ![]()
|
|---|---|
| 1 |
|
-
Components
+RNA chain , 3 types, 3 molecules D3D2D4
+U3 small nucleolar ribonucleoprotein protein ... , 3 types, 3 molecules CJCIJE
+U3 small nucleolar RNA-associated protein ... , 17 types, 17 molecules CKUEUHUKULUMUOUPUNUFUGURUUUDUIUJUT
+Ribosome biogenesis protein ... , 3 types, 3 molecules CLJCUZ
+40S ribosomal protein ... , 13 types, 13 molecules DYDFDIDJDSDEDXDWDGDLDcDQDH
+RRNA-processing protein ... , 2 types, 2 molecules UXJM
+Protein , 16 types, 20 molecules JGJFCACBUCCFCGJHJJJKJQCHJNJOCMJPUQUAJAJB
+Nucleolar complex protein ... , 2 types, 2 molecules UBUS
+Nucleolar protein ... , 2 types, 2 molecules CECD
+Non-polymers , 2 types, 2 molecules 


+Details
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
|---|---|
| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-
Sample preparation
| Component | Name: Utp23-FTpA, Krr1-deltaC3 / Type: RIBOSOME / Entity ID: #1-#61 / Source: NATURAL |
|---|---|
| Source (natural) | Organism: ![]() |
| Buffer solution | pH: 7.5 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Vitrification | Cryogen name: ETHANE |
-
Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
|---|---|
| Microscopy | Model: TFS KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 3500 nm / Nominal defocus min: 500 nm |
| Image recording | Electron dose: 46.4 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-
Processing
| EM software | Name: PHENIX / Version: 1.19.2_4158: / Category: model refinement | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.05 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 32278 / Symmetry type: POINT | ||||||||||||||||||||||||
| Refine LS restraints |
|
Movie
Controller
About Yorodumi






Citation



















PDBj






































FIELD EMISSION GUN