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- PDB-6w2s: Structure of the Cricket Paralysis Virus 5-UTR IRES (CrPV 5-UTR-I... -
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Basic information
Entry | Database: PDB / ID: 6w2s | ||||||
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Title | Structure of the Cricket Paralysis Virus 5-UTR IRES (CrPV 5-UTR-IRES) bound to the small ribosomal subunit in the open state (Class 1) | ||||||
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![]() | Ribosome/TRANSLATION / CrPV 5'-UTR IRES / Internal ribosome entry site / RIBOSOME / Ribosome-TRANSLATION complex | ||||||
Function / homology | ![]() viral translational termination-reinitiation / eukaryotic translation initiation factor 3 complex, eIF3e / eukaryotic translation initiation factor 3 complex, eIF3m / translation reinitiation / IRES-dependent viral translational initiation / multi-eIF complex / formation of cytoplasmic translation initiation complex / eukaryotic translation initiation factor 3 complex / eukaryotic 43S preinitiation complex / eukaryotic 48S preinitiation complex ...viral translational termination-reinitiation / eukaryotic translation initiation factor 3 complex, eIF3e / eukaryotic translation initiation factor 3 complex, eIF3m / translation reinitiation / IRES-dependent viral translational initiation / multi-eIF complex / formation of cytoplasmic translation initiation complex / eukaryotic translation initiation factor 3 complex / eukaryotic 43S preinitiation complex / eukaryotic 48S preinitiation complex / metal-dependent deubiquitinase activity / regulation of translational initiation / laminin receptor activity / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / mammalian oogenesis stage / activation-induced cell death of T cells / positive regulation of signal transduction by p53 class mediator / phagocytic cup / ubiquitin ligase inhibitor activity / TOR signaling / T cell proliferation involved in immune response / erythrocyte development / translation regulator activity / ribosomal small subunit export from nucleus / cytosolic ribosome / laminin binding / rough endoplasmic reticulum / gastrulation / MDM2/MDM4 family protein binding / translation initiation factor binding / translation initiation factor activity / 90S preribosome / class I DNA-(apurinic or apyrimidinic site) endonuclease activity / DNA-(apurinic or apyrimidinic site) lyase / rescue of stalled ribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / positive regulation of apoptotic signaling pathway / cellular response to leukemia inhibitory factor / maturation of SSU-rRNA / small-subunit processome / positive regulation of translation / protein kinase C binding / positive regulation of protein-containing complex assembly / placenta development / PML body / fibrillar center / modification-dependent protein catabolic process / spindle / cytoplasmic ribonucleoprotein granule / G1/S transition of mitotic cell cycle / rRNA processing / protein tag activity / metallopeptidase activity / positive regulation of canonical Wnt signaling pathway / rhythmic process / ribosome binding / glucose homeostasis / regulation of translation / virus receptor activity / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cell body / T cell differentiation in thymus / perikaryon / cytosolic small ribosomal subunit / cysteine-type deubiquitinase activity / cytoplasmic translation / mitochondrial inner membrane / postsynaptic density / cell differentiation / rRNA binding / ribosome / protein ubiquitination / structural constituent of ribosome / ribonucleoprotein complex / translation / positive regulation of protein phosphorylation / positive regulation of apoptotic process / cell division / DNA repair / mRNA binding / centrosome / ubiquitin protein ligase binding / synapse / dendrite / positive regulation of cell population proliferation / apoptotic process / nucleolus / negative regulation of apoptotic process / protein kinase binding / perinuclear region of cytoplasm / Golgi apparatus / endoplasmic reticulum / DNA binding / RNA binding / zinc ion binding / nucleoplasm / identical protein binding Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.47 Å | ||||||
![]() | Neupane, R. / Pisareva, V. / Rodriguez, C.F. / Pisarev, A. / Fernandez, I.S. | ||||||
Funding support | ![]()
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![]() | ![]() Title: A complex IRES at the 5'-UTR of a viral mRNA assembles a functional 48S complex via an uAUG intermediate. Authors: Ritam Neupane / Vera P Pisareva / Carlos F Rodriguez / Andrey V Pisarev / Israel S Fernández / ![]() ![]() Abstract: Taking control of the cellular apparatus for protein production is a requirement for virus progression. To ensure this control, diverse strategies of cellular mimicry and/or ribosome hijacking have ...Taking control of the cellular apparatus for protein production is a requirement for virus progression. To ensure this control, diverse strategies of cellular mimicry and/or ribosome hijacking have evolved. The initiation stage of translation is especially targeted as it involves multiple steps and the engagement of numerous initiation factors. The use of structured RNA sequences, called nternal ibosomal ntry ites (IRES), in viral RNAs is a widespread strategy for the exploitation of eukaryotic initiation. Using a combination of electron cryo-microscopy (cryo-EM) and reconstituted translation initiation assays with native components, we characterized how a novel IRES at the 5'-UTR of a viral RNA assembles a functional initiation complex via an uAUG intermediate. The IRES features a novel extended, multi-domain architecture, that circles the 40S head. The structures and accompanying functional data illustrate the importance of 5'-UTR regions in translation regulation and underline the relevance of the untapped diversity of viral IRESs. | ||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 2.6 MB | Display | ![]() |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 21529MC ![]() 6w2tC 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 , 2 types, 2 molecules A0
#1: RNA chain | Mass: 547733.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#2: RNA chain | Mass: 121094.953 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
+Protein , 33 types, 33 molecules BCDFHIJKMOPWXYZbcfEGLNQRSTUVad...
-Eukaryotic translation initiation factor 3 subunit ... , 8 types, 8 molecules 12345678
#36: Protein | Mass: 164902.656 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#37: Protein | Mass: 105706.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#38: Protein | Mass: 54199.863 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#39: Protein | Mass: 37846.730 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#40: Protein | Mass: 41083.531 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#41: Protein | Mass: 25129.709 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#42: Protein | Mass: 71001.477 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#43: Protein | Mass: 42555.832 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Non-polymers , 2 types, 2 molecules ![](data/chem/img/MG.gif)
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#44: Chemical | ChemComp-MG / |
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#45: Chemical | ChemComp-ZN / |
-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: Structure of the Cricket Paralysis Virus 5-UTR IRES (CrPV 5-UTR-IRES) bound to the small ribosomal subunit in the open state (Class 1) Type: RIBOSOME / Entity ID: #1-#43 / Source: MULTIPLE SOURCES |
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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 |
Specimen support | Grid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil, UltrAuFoil, R1.2/1.3 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K Details: Grids were blotted for 2.5s and flash cooled in liquid 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 |
Image recording | Average exposure time: 8 sec. / Electron dose: 56.9 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 |
Image scans | Movie frames/image: 40 / Used frames/image: 1-40 |
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Processing
Software | Name: REFMAC / Version: 5.8.0253 / Classification: refinement | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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EM software |
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Image processing | Details: The microscope was equipped with an energy filter with slits aperture of 20eV, installed before the detector. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 915647 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.47 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 36100 / Num. of class averages: 1 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement | Resolution: 3.47→3.47 Å / Cor.coef. Fo:Fc: 0.843 / SU B: 20.39 / SU ML: 0.323 / ESU R: 0.367 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 120.284 Å2
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Refinement step | Cycle: 1 / Total: 106817 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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