+Open data
-Basic information
Entry | Database: PDB / ID: 7mpi | ||||||
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Title | Stm1 bound vacant 80S structure isolated from cbf5-D95A | ||||||
Components |
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Keywords | RIBOSOME / yeast / 80S complex / chemical modification | ||||||
Function / homology | Function and homology information triplex DNA binding / ribosome hibernation / translation elongation factor binding / regulation of translational initiation in response to stress / Platelet degranulation / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / Protein methylation / RMTs methylate histone arginines ...triplex DNA binding / ribosome hibernation / translation elongation factor binding / regulation of translational initiation in response to stress / Platelet degranulation / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / Protein methylation / RMTs methylate histone arginines / positive regulation of translational fidelity / mTORC1-mediated signalling / ribosome-associated ubiquitin-dependent protein catabolic process / Protein hydroxylation / GDP-dissociation inhibitor activity / : / pre-mRNA 5'-splice site 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 / cleavage in ITS2 between 5.8S rRNA and LSU-rRNA of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Ribosomal scanning and start codon recognition / preribosome, small subunit precursor / translational elongation / response to cycloheximide / telomeric DNA binding / mRNA destabilization / TOR signaling / Major pathway of rRNA processing in the nucleolus and cytosol / SRP-dependent cotranslational protein targeting to membrane / 90S preribosome / GTP hydrolysis and joining of the 60S ribosomal subunit / Formation of a pool of free 40S subunits / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of mRNA splicing, via spliceosome / protein-RNA complex assembly / ribosomal small subunit export from nucleus / preribosome, large subunit precursor / L13a-mediated translational silencing of Ceruloplasmin expression / translation regulator activity / ribosomal large subunit export from nucleus / G-protein alpha-subunit 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) / regulation of translational fidelity / positive regulation of protein kinase activity / rescue of stalled ribosome / translational termination / maturation of SSU-rRNA / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / translation repressor activity / maturation of LSU-rRNA / ribosomal large subunit biogenesis / DNA-(apurinic or apyrimidinic site) endonuclease activity / cellular response to amino acid starvation / ribosome assembly / telomere maintenance / small-subunit processome / protein kinase C binding / maintenance of translational fidelity / macroautophagy / modification-dependent protein catabolic process / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / protein tag activity / ribosomal large subunit assembly / ribosomal small subunit assembly / rRNA processing / cytoplasmic stress granule / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / ribosome binding / ribosome biogenesis / cytoplasmic translation / small ribosomal subunit / 5S rRNA binding / cytosolic large ribosomal subunit / negative regulation of translation / rRNA binding / protein ubiquitination / ribosome / structural constituent of ribosome / positive regulation of protein phosphorylation / translation / G protein-coupled receptor signaling pathway / negative regulation of gene expression / response to antibiotic / mRNA binding / ubiquitin protein ligase binding / nucleolus / negative regulation of apoptotic process / perinuclear region of cytoplasm / mitochondrion / DNA binding / RNA binding / zinc ion binding / nucleoplasm / metal ion binding Similarity search - Function | ||||||
Biological species | Saccharomyces cerevisiae (brewer's yeast) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.05 Å | ||||||
Authors | Rai, J. / Zhao, Y. / Li, H. | ||||||
Funding support | United States, 1items
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Citation | Journal: Structure / Year: 2022 Title: CryoEM structures of pseudouridine-free ribosome suggest impacts of chemical modifications on ribosome conformations. Authors: Yu Zhao / Jay Rai / Hongguo Yu / Hong Li / Abstract: Pseudouridine, the most abundant form of RNA modification, is known to play important roles in ribosome function. Mutations in human DKC1, the pseudouridine synthase responsible for catalyzing the ...Pseudouridine, the most abundant form of RNA modification, is known to play important roles in ribosome function. Mutations in human DKC1, the pseudouridine synthase responsible for catalyzing the ribosome RNA modification, cause translation deficiencies and are associated with a complex cancer predisposition. The structural basis for how pseudouridine impacts ribosome function remains uncharacterized. Here, we characterized structures and conformations of a fully modified and a pseudouridine-free ribosome from Saccharomyces cerevisiae in the absence of ligands or when bound with translocation inhibitor cycloheximide by electron cryomicroscopy. In the modified ribosome, the rearranged N1 atom of pseudouridine is observed to stabilize key functional motifs by establishing predominately water-mediated close contacts with the phosphate backbone. The pseudouridine-free ribosome, however, is devoid of such interactions and displays conformations reflective of abnormal inter-subunit movements. The erroneous motions of the pseudouridine-free ribosome may explain its observed deficiencies in translation. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 7mpi.cif.gz | 4.3 MB | Display | PDBx/mmCIF format |
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PDB format | pdb7mpi.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 7mpi.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/mp/7mpi ftp://data.pdbj.org/pub/pdb/validation_reports/mp/7mpi | HTTPS FTP |
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-Related structure data
Related structure data | 23934MC 7mpjC 7n8bC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
+40S ribosomal protein ... , 32 types, 32 molecules BABBBCBDBEBFBGBHBIBJBKBLBMBNBOBPBQBRBSBTBUBVBWBXBYBZBaBbBcBdBeBf
-Protein , 2 types, 2 molecules BgBh
#33: Protein | Mass: 34151.484 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P38011 |
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#34: Protein | Mass: 9664.376 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P39015 |
-RNA chain , 4 types, 4 molecules B5A1A3A4
#35: RNA chain | Mass: 574269.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) |
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#36: RNA chain | Mass: 1014553.312 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) |
#37: RNA chain | Mass: 38951.105 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) |
#38: RNA chain | Mass: 50682.922 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) |
+60S ribosomal protein ... , 41 types, 41 molecules AAABACADAEAFAGAHAIAJALAMANAOAPAQARASATAUAVAWAXAYAZAaAbAcAdAe...
-Non-polymers , 2 types, 368 molecules
#80: Chemical | ChemComp-MG / #81: Chemical | |
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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 |
-Sample preparation
Component |
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Source (natural) |
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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 |
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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 FIELDBright-field microscopy |
Image recording | Electron dose: 61 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
-Processing
Software | Name: PHENIX / Version: 1.18.2_3874: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.05 Å / Resolution method: OTHER / Num. of particles: 404065 / Symmetry type: POINT | ||||||||||||||||||||||||
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