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- PDB-4v8y: Cryo-EM reconstruction of the 80S-eIF5B-Met-itRNAMet Eukaryotic T... -
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Open data
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Basic information
Entry | Database: PDB / ID: 4v8y | |||||||||||||||||||||
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Title | Cryo-EM reconstruction of the 80S-eIF5B-Met-itRNAMet Eukaryotic Translation Initiation Complex | |||||||||||||||||||||
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![]() | RIBOSOME / RIBOSOME INITIATION COMPLEX / INITIATOR FACTOR EIF5B / SINGLE PARTICLE ANALYSIS | |||||||||||||||||||||
Function / homology | ![]() triplex DNA binding / ribosome hibernation / translation elongation factor binding / regulation of translational initiation in response to stress / Platelet degranulation / 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 ...triplex DNA binding / ribosome hibernation / translation elongation factor binding / regulation of translational initiation in response to stress / Platelet degranulation / 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 / regulation of translational initiation / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / pre-mRNA 5'-splice site binding / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / Ribosomal scanning and start codon recognition / translational elongation / cleavage in ITS2 between 5.8S rRNA and LSU-rRNA of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / preribosome, small subunit precursor / response to cycloheximide / telomeric DNA binding / 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) / negative regulation of mRNA splicing, via spliceosome / L13a-mediated translational silencing of Ceruloplasmin expression / preribosome, large subunit precursor / 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 / TOR signaling / positive regulation of protein kinase activity / protein-RNA complex assembly / regulation of translational fidelity / Ub-specific processing proteases / ribosomal small subunit export from nucleus / translation regulator activity / ribosomal subunit export from nucleus / translational termination / 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) / translation repressor activity / 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 / telomere maintenance / rescue of stalled ribosome / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / 90S preribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / cytosolic ribosome assembly / maturation of LSU-rRNA / ribosomal large subunit biogenesis / 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 / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / 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 / response to antibiotic / GTPase activity Similarity search - Function | |||||||||||||||||||||
Biological species | ![]() ![]() | |||||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.3 Å | |||||||||||||||||||||
![]() | Fernandez, I.S. / Bai, X.C. / Hussain, T. / Kelley, A.C. / Lorsch, J.R. / Ramakrishnan, V. / Scheres, S.H.W. | |||||||||||||||||||||
![]() | ![]() Title: Molecular architecture of a eukaryotic translational initiation complex. Authors: Israel S Fernández / Xiao-Chen Bai / Tanweer Hussain / Ann C Kelley / Jon R Lorsch / V Ramakrishnan / Sjors H W Scheres / ![]() ![]() Abstract: The last step in eukaryotic translational initiation involves the joining of the large and small subunits of the ribosome, with initiator transfer RNA (Met-tRNA(i)(Met)) positioned over the start ...The last step in eukaryotic translational initiation involves the joining of the large and small subunits of the ribosome, with initiator transfer RNA (Met-tRNA(i)(Met)) positioned over the start codon of messenger RNA in the P site. This step is catalyzed by initiation factor eIF5B. We used recent advances in cryo-electron microscopy (cryo-EM) to determine a structure of the eIF5B initiation complex to 6.6 angstrom resolution from <3% of the population, comprising just 5143 particles. The structure reveals conformational changes in eIF5B, initiator tRNA, and the ribosome that provide insights into the role of eIF5B in translational initiation. The relatively high resolution obtained from such a small fraction of a heterogeneous sample suggests a general approach for characterizing the structure of other dynamic or transient biological complexes. | |||||||||||||||||||||
History |
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Remark 700 | SHEET DETERMINATION METHOD: DSSP THE SHEETS PRESENTED AS "LA" IN EACH CHAIN ON SHEET RECORDS BELOW ... SHEET DETERMINATION METHOD: DSSP THE SHEETS PRESENTED AS "LA" IN EACH CHAIN ON SHEET RECORDS BELOW IS ACTUALLY AN 5-STRANDED BARREL THIS IS REPRESENTED BY A 6-STRANDED SHEET IN WHICH THE FIRST AND LAST STRANDS ARE IDENTICAL. THE SHEETS PRESENTED AS "XA" IN EACH CHAIN ON SHEET RECORDS BELOW IS ACTUALLY AN 5-STRANDED BARREL THIS IS REPRESENTED BY A 6-STRANDED SHEET IN WHICH THE FIRST AND LAST STRANDS ARE IDENTICAL. |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 5.5 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 2.1 MB | Display | ![]() |
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Full document | ![]() | 2.9 MB | Display | |
Data in XML | ![]() | 431.3 KB | Display | |
Data in CIF | ![]() | 712.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 2421MC ![]() 2422C ![]() 4v8zC 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
+40S RIBOSOMAL PROTEIN ... , 31 types, 31 molecules A0A1A2A3A4AAABACADAEAFAGAHAIAJAKALAMANAOAPAQARASATAUAVAWAXAYAZ
-Protein , 6 types, 7 molecules A5A6A7BmByCLCP
#6: Protein | Mass: 16559.258 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() | ||
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#7: Protein | Mass: 34841.219 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() | ||
#8: Protein | Mass: 29052.369 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() | ||
#73: Protein | Mass: 14583.077 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() | ||
#79: Protein | Mass: 24867.699 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #85: Protein | | Mass: 37861.547 Da / Num. of mol.: 1 / Fragment: DOMAIN 1 AND 2, RESIDUES 401-739 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
+60S RIBOSOMAL PROTEIN ... , 40 types, 40 molecules BABBBCBDBEBFBGBHBIBJBKBLBMBNBOBPBQBRBSBTBUBVBWBXBYBZBaBbBcBd...
-60S ACIDIC RIBOSOMAL PROTEIN ... , 3 types, 3 molecules BqBrBs
#76: Protein | Mass: 33749.121 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#77: Protein/peptide | Mass: 4017.944 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#78: Protein/peptide | Mass: 3932.839 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-RNA chain , 4 types, 4 molecules B2B5B7B8
#80: RNA chain | Mass: 577937.500 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#81: RNA chain | Mass: 1097493.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#82: RNA chain | Mass: 38951.105 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#83: RNA chain | Mass: 50682.922 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-EUKARYOTIC RIBOSOMAL ... , 2 types, 2 molecules CNCW
#84: RNA chain | Mass: 28286.842 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#86: RNA chain | Mass: 24485.539 Da / Num. of mol.: 1 / Source method: obtained synthetically Source: (natural) ![]() ![]() ![]() ![]() |
-Non-polymers , 4 types, 395 molecules ![](data/chem/img/ZN.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/OHX.gif)
![](data/chem/img/GCP.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/OHX.gif)
![](data/chem/img/GCP.gif)
#87: Chemical | ChemComp-ZN / #88: Chemical | ChemComp-MG / #89: Chemical | ChemComp-OHX / #90: Chemical | ChemComp-GCP / | |
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-Details
Sequence details | THESE ARE PARTS OF THE PROTEIN SEQUENCES MODELED AS UNK RESIDUES. |
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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: 80S-EIF5B-MET-ITRNAMET EUKARYOTIC TRANSLATION INITIATION COMPLEX WITH TRNA IN THE PE-SITE AND ONLY DENSITY FOR THE G DOMAIN AND DOMAIN II Type: RIBOSOME |
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Buffer solution | Name: 3MM HEPES-KOH, 6.6 MM TRIS-ACETATE PH 7.2, 3 MM NH4CL, 6.6 MM NH4- ACETATE, 48 MM K-ACETATE, 4 MM MG-ACETATE, 2.4 MM DTT pH: 7.2 Details: 3MM HEPES-KOH, 6.6 MM TRIS-ACETATE PH 7.2, 3 MM NH4CL, 6.6 MM NH4- ACETATE, 48 MM K-ACETATE, 4 MM MG-ACETATE, 2.4 MM DTT |
Specimen | Conc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: FORMVAR PLUS CARBON |
Vitrification | Instrument: FEI VITROBOT MARK II / Cryogen name: ETHANE Details: VITRIFICATION 1 -- CRYOGEN- ETHANE, HUMIDITY- 100, TEMPERATURE- 90, INSTRUMENT- FEI VITROBOT MARK II, METHOD- BLOT 2.5 SECONDS BEFORE PLUNGING, |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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Microscopy | Model: FEI POLARA 300 / Date: Jan 15, 2013 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 59000 X / Calibrated magnification: 79096 X / Nominal defocus max: 3900 nm / Nominal defocus min: 1900 nm / Cs: 2 mm |
Specimen holder | Temperature: 85 K |
Image recording | Electron dose: 16 e/Å2 / Film or detector model: FEI FALCON I (4k x 4k) |
Image scans | Num. digital images: 1012 |
Radiation wavelength | Relative weight: 1 |
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Processing
EM software |
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CTF correction | Details: EACH PARTICLE | ||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||
3D reconstruction | Resolution: 4.3 Å / Num. of particles: 40729 / Actual pixel size: 1.77 Å Magnification calibration: CROSS-CORRELATION BETWEEN CRYO-EM MAP AND CRYSTAL STRUCTURE Details: USE A NEWLY DEVELOPED STATISTICAL MOVIE PROCESSING APPROACH TO COMPENSATE FOR BEAM-INDUCED MOVEMENT. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2421. (DEPOSITION ID: 11807). Symmetry type: POINT | ||||||||||||
Atomic model building | Protocol: RIGID BODY FIT / Details: METHOD--RIGID-BODY FITTING | ||||||||||||
Refinement | Highest resolution: 4.3 Å | ||||||||||||
Refinement step | Cycle: LAST / Highest resolution: 4.3 Å
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