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- PDB-8cas: Cryo-EM structure of native Otu2-bound ubiquitinated 48S initiati... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8cas | ||||||||||||||||||
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Title | Cryo-EM structure of native Otu2-bound ubiquitinated 48S initiation complex (partial) | ||||||||||||||||||
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![]() | RIBOSOME / Translation / Ubiquitin / Deubiquitinating enzyme / Initiation / Complex | ||||||||||||||||||
Function / homology | ![]() eukaryotic translation initiation factor 3 complex, eIF3e / eukaryotic translation initiation factor 3 complex, eIF3m / translation reinitiation / incipient cellular bud site / multi-eIF complex / eukaryotic translation initiation factor 3 complex / eukaryotic 43S preinitiation complex / protein-synthesizing GTPase / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / formation of cytoplasmic translation initiation complex ...eukaryotic translation initiation factor 3 complex, eIF3e / eukaryotic translation initiation factor 3 complex, eIF3m / translation reinitiation / incipient cellular bud site / multi-eIF complex / eukaryotic translation initiation factor 3 complex / eukaryotic 43S preinitiation complex / protein-synthesizing GTPase / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / formation of cytoplasmic translation initiation complex / eukaryotic 48S preinitiation complex / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / Negative regulators of DDX58/IFIH1 signaling / positive regulation of translational fidelity / Protein methylation / RMTs methylate histone arginines / mTORC1-mediated signalling / Protein hydroxylation / ribosome-associated ubiquitin-dependent protein catabolic process / GDP-dissociation inhibitor activity / 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 / preribosome, small subunit precursor / mRNA destabilization / Major pathway of rRNA processing in the nucleolus and cytosol / SRP-dependent cotranslational protein targeting to membrane / 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) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / L13a-mediated translational silencing of Ceruloplasmin expression / ribosomal large subunit export from nucleus / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / G-protein alpha-subunit binding / positive regulation of protein kinase activity / regulation of translational fidelity / Ub-specific processing proteases / ribosomal small subunit export from nucleus / translation regulator activity / ribosomal subunit export from nucleus / 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) / DNA-(apurinic or apyrimidinic site) endonuclease activity / translation initiation factor binding / translational initiation / translation initiation factor activity / cellular response to amino acid starvation / ribosome assembly / rescue of stalled ribosome / 90S preribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / positive regulation of apoptotic signaling pathway / protein kinase C binding / maintenance of translational fidelity / ribosomal large subunit assembly / cytoplasmic stress granule / modification-dependent protein catabolic process / rRNA processing / protein tag activity / ribosome biogenesis / ribosome binding / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cysteine-type deubiquitinase activity / cytosolic large ribosomal subunit / tRNA binding / cytoplasmic translation / rRNA binding / negative regulation of translation / ribosome / protein ubiquitination / structural constituent of ribosome / translation / positive regulation of protein phosphorylation / G protein-coupled receptor signaling pathway / negative regulation of gene expression / GTPase activity / mRNA binding / ubiquitin protein ligase binding / nucleolus / GTP binding / ATP hydrolysis activity / mitochondrion / RNA binding / zinc ion binding / nucleoplasm / ATP binding / nucleus / metal ion binding / cytoplasm / cytosol Similarity search - Function | ||||||||||||||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||||||||||||||
![]() | Ikeuchi, K. / Buschauer, R. / Cheng, J. / Berninghausen, O. / Becker, T. / Beckmann, R. | ||||||||||||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Molecular basis for recognition and deubiquitination of 40S ribosomes by Otu2. Authors: Ken Ikeuchi / Nives Ivic / Robert Buschauer / Jingdong Cheng / Thomas Fröhlich / Yoshitaka Matsuo / Otto Berninghausen / Toshifumi Inada / Thomas Becker / Roland Beckmann / ![]() ![]() ![]() ![]() Abstract: In actively translating 80S ribosomes the ribosomal protein eS7 of the 40S subunit is monoubiquitinated by the E3 ligase Not4 and deubiquitinated by Otu2 upon ribosomal subunit recycling. Despite its ...In actively translating 80S ribosomes the ribosomal protein eS7 of the 40S subunit is monoubiquitinated by the E3 ligase Not4 and deubiquitinated by Otu2 upon ribosomal subunit recycling. Despite its importance for translation efficiency the exact role and structural basis for this translational reset is poorly understood. Here, structural analysis by cryo-electron microscopy of native and reconstituted Otu2-bound ribosomal complexes reveals that Otu2 engages 40S subunits mainly between ribosome recycling and initiation stages. Otu2 binds to several sites on the intersubunit surface of the 40S that are not occupied by any other 40S-binding factors. This binding mode explains the discrimination against 80S ribosomes via the largely helical N-terminal domain of Otu2 as well as the specificity for mono-ubiquitinated eS7 on 40S. Collectively, this study reveals mechanistic insights into the Otu2-driven deubiquitination steps for translational reset during ribosome recycling/(re)initiation. | ||||||||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2.2 MB | Display | ![]() |
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PDB format | ![]() | 1.6 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 2 MB | Display | ![]() |
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Full document | ![]() | 2 MB | Display | |
Data in XML | ![]() | 211.6 KB | Display | |
Data in CIF | ![]() | 382.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 16533MC ![]() 8c83C ![]() 8cahC ![]() 8cbjC C: citing same article ( M: map data used to model this data |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
+40S ribosomal protein ... , 30 types, 30 molecules PQRSTVWXYZabcdefgBDFHIJKLMOiCU
-Protein , 10 types, 10 molecules ENhmAkjGsx
#18: Protein | Mass: 16031.907 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#28: Protein | Mass: 6675.723 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#30: Protein | Mass: 34841.219 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#35: Protein | Mass: 45321.977 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#40: Protein | Mass: 17462.168 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#41: Protein | Mass: 68433.242 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#46: Protein | Mass: 34763.652 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#47: Protein | Mass: 57942.699 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() References: UniProt: A0A6A5Q017, protein-synthesizing GTPase |
#48: Protein | Mass: 31631.309 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#49: Protein | Mass: 36157.016 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
-Eukaryotic translation initiation factor 3 subunit ... , 5 types, 5 molecules lropq
#32: Protein | Mass: 38803.375 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#33: Protein | Mass: 30547.525 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#36: Protein | Mass: 110517.641 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#37: Protein | Mass: 88241.766 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#38: Protein | Mass: 93310.172 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-RNA chain , 3 types, 3 molecules 132
#34: RNA chain | Mass: 24712.961 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#39: RNA chain | Mass: 2534.585 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#42: RNA chain | Mass: 579761.938 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-60S ribosomal protein ... , 2 types, 2 molecules yn
#44: Protein | Mass: 8576.831 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#45: Protein/peptide | Mass: 3354.243 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Non-polymers , 7 types, 15 molecules ![](data/chem/img/ZN.gif)
![](data/chem/img/ADP.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/ATP.gif)
![](data/chem/img/SF4.gif)
![](data/chem/img/MET.gif)
![](data/chem/img/GCP.gif)
![](data/chem/img/ADP.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/ATP.gif)
![](data/chem/img/SF4.gif)
![](data/chem/img/MET.gif)
![](data/chem/img/GCP.gif)
#51: Chemical | ChemComp-ZN / #52: Chemical | ChemComp-ADP / | #53: Chemical | ChemComp-MG / #54: Chemical | ChemComp-ATP / | #55: Chemical | #56: Chemical | ChemComp-MET / | #57: Chemical | ChemComp-GCP / | |
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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 |
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Sample preparation
Component | Name: Yeast native 48S initiation complex (partial) with deubiquitinating enzyme Otu2 bound to ubiquitinated eS7 Type: RIBOSOME / Entity ID: #1-#50 / Source: NATURAL |
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Molecular weight | Experimental value: NO |
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 |
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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: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 500 nm |
Image recording | Electron dose: 46.4 e/Å2 / Detector mode: COUNTING / 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: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 12059 / Symmetry type: POINT | ||||||||||||||||||||||||
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