Peptide chain release factor eRF1/aRF1 / eRF1, domain 1 / eRF1 domain 2 / eRF1 domain 2 / eRF1 domain 1 / eRF1 domain 1/Pelota-like / eRF1 domain 3 / eRF1, domain 2 superfamily / eRF1 domain 3 / eRF1_1 ...Peptide chain release factor eRF1/aRF1 / eRF1, domain 1 / eRF1 domain 2 / eRF1 domain 2 / eRF1 domain 1 / eRF1 domain 1/Pelota-like / eRF1 domain 3 / eRF1, domain 2 superfamily / eRF1 domain 3 / eRF1_1 / 60S acidic ribosomal protein P0 / 40S ribosomal protein SA C-terminus / Ribosomal protein L6, N-terminal domain / Ribosomal L28e protein family / 60S ribosomal protein L10P, insertion domain / Insertion domain in 60S ribosomal protein L10P / : / Ribosomal protein S26e signature. / S25 ribosomal protein / Ribosomal protein S26e / Ribosomal protein S26e superfamily / Ribosomal protein S26e / Ribosomal protein S21e, conserved site / Ribosomal protein S21e signature. / Ribosomal L29e protein family / Ribosomal protein S30 / Ribosomal protein S12e signature. / Ribosomal protein S27a / Ribosomal S17 / Ribosomal protein S19e signature. / Ribosomal protein L38e / Ribosomal protein L38e superfamily / Ribosomal protein S21e / Ribosomal protein S21e superfamily / Ribosomal protein S21e / Ribosomal protein S19e / Ribosomal L38e protein family / Ribosomal L22e protein family / 40S Ribosomal protein S10 / 40S ribosomal protein S4 C-terminus / Ribosomal_S17 N-terminal / Plectin/S10, N-terminal / Ribosomal protein L44 / Ribosomal protein S7e / Ribosomal protein L23, N-terminal domain / Plectin/S10 domain / Ribosomal L27e protein family / RS4NT (NUC023) domain / Ribosomal protein L34e / Ribosomal protein L1 signature. / Ribosomal protein S27 / Ribosomal protein L19, eukaryotic / Ribosomal S3Ae family / Ribosomal protein S17e signature. / Ribosomal protein S28e / Ribosomal protein L44e signature. / Ribosomal family S4e / Ribosomal S13/S15 N-terminal domain / Ribosomal protein L27e signature. / Ribosomal protein L10e signature. / Ribosomal protein S7e signature. / Ribosomal protein L6e / Ribosomal L30 N-terminal domain / Ribosomal protein L19/L19e conserved site / Ribosomal protein S6e / Ribosomal L37ae protein family / Ribosomal protein S3Ae signature. / Ribosomal protein S27e signature. / Ribosomal protein L35Ae / Ribosomal protein S4e signature. / Ribosomal protein L39e, conserved site / Ribosomal protein S8e signature. / 60S ribosomal protein L4 C-terminal domain / Ribosomal protein L19e signature. / Ribosomal proteins 50S-L18Ae/60S-L20/60S-L18A / Ribosomal protein L24e signature. / Ribosomal protein L5 eukaryotic, C-terminal / Ribosomal L18 C-terminal region / Ribosomal protein L34e signature. / Ribosomal protein L6e signature. / Ribosomal protein L30e signature 1. / Ribosomal protein 60S L18 and 50S L18e / Ribosomal S24e conserved site / Ribosomal protein S24e signature. / Ribosomal protein L30e signature 2. / 60S ribosomal protein L19 / Ribosomal protein L36e signature. / Ribosomal protein L14 / Ribosomal protein L39e signature. / Ribosomal protein L21e / Ribosomal protein L31e / Ribosomal protein S24e / Ribosomal protein S24e / Ribosomal protein S6e signature. / Ribosomal protein L35Ae signature. / Ribosomal protein L18/L18-A/B/e, conserved site / Ribosomal protein L18e signature. / Ribosomal protein L39e / Ribosomal protein L39e domain superfamily / Ribosomal_L19e Similarity search - Domain/homology
: / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / : / Large ribosomal subunit protein uL16 / Small ribosomal subunit protein uS4 / Large ribosomal subunit protein eL24 / Large ribosomal subunit protein uL23 ...: / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / : / Large ribosomal subunit protein uL16 / Small ribosomal subunit protein uS4 / Large ribosomal subunit protein eL24 / Large ribosomal subunit protein uL23 / Large ribosomal subunit protein eL33 / Small ribosomal subunit protein eS12 / Large ribosomal subunit protein eL29 / Small ribosomal subunit protein uS9 / Large ribosomal subunit protein eL31 / Large ribosomal subunit protein eL21 / Large ribosomal subunit protein uL29 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein RACK1 / Ubiquitin-ribosomal protein eS31 fusion protein / Large ribosomal subunit protein eL6 / Large ribosomal subunit protein uL1 / Large ribosomal subunit protein uL11 / Large ribosomal subunit protein uL15 / Small ribosomal subunit protein uS15 / Large ribosomal subunit protein uL24 / Small ribosomal subunit protein eS1 / Large ribosomal subunit protein eL8 / Large ribosomal subunit protein uL30 / Small ribosomal subunit protein eS7 / Large ribosomal subunit protein uL4 / Large ribosomal subunit protein uL6 / Small ribosomal subunit protein uS5 / Large ribosomal subunit protein eL43 / Large ribosomal subunit protein uL18 / Small ribosomal subunit protein uS12 / Large ribosomal subunit protein eL15 / 40S ribosomal protein S24 / Large ribosomal subunit protein uL14 / Ubiquitin-like FUBI-ribosomal protein eS30 fusion protein / Small ribosomal subunit protein eS25 / Large ribosomal subunit protein eL30 / 40S ribosomal protein S26 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein eS28 / Ribosomal protein L19 / Small ribosomal subunit protein eS8 / Small ribosomal subunit protein eS4 / Large ribosomal subunit protein uL3 / Small ribosomal subunit protein eS6 / Small ribosomal subunit protein eS21 / Small ribosomal subunit protein eS19 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS13 / Plectin/eS10 N-terminal domain-containing protein / Small ribosomal subunit protein uS17 / Large ribosomal subunit protein eL22 / Large ribosomal subunit protein uL2 / Large ribosomal subunit protein eL39 / Large ribosomal subunit protein eL36 / Large ribosomal subunit protein eL20 / Small ribosomal subunit protein eS17 / Large ribosomal subunit protein uL5 / Large ribosomal subunit protein uL22 / Small ribosomal subunit protein uS2 / Large ribosomal subunit protein uL6 / Large ribosomal subunit protein uL15/eL18 domain-containing protein / Large ribosomal subunit protein eL27 / Small ribosomal subunit protein eS27 / Large ribosomal subunit protein eL38 / Small ribosomal subunit protein uS19 / Large ribosomal subunit protein eL42 / 60S ribosomal protein L38 / Large ribosomal subunit protein eL32 / Small ribosomal subunit protein uS11 / 60S acidic ribosomal protein P0 / Large ribosomal subunit protein eL28 / Small ribosomal subunit protein uS14 / Large ribosomal subunit protein eL34 / Eukaryotic peptide chain release factor subunit 1 / Large ribosomal subunit protein eL14 / Large ribosomal subunit protein eL37 Similarity search - Component
Biological species
Homo sapiens (human) Oryctolagus cuniculus (rabbit) Escherichia coli (E. coli) Cricket paralysis virus
Method
ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
GM097014
United States
Citation
Journal: Elife / Year: 2018 Title: Dual tRNA mimicry in the Cricket Paralysis Virus IRES uncovers an unexpected similarity with the Hepatitis C Virus IRES. Authors: Vera P Pisareva / Andrey V Pisarev / Israel S Fernández / Abstract: Co-opting the cellular machinery for protein production is a compulsory requirement for viruses. The Cricket Paralysis Virus employs an Internal Ribosomal Entry Site (CrPV-IRES) to express its ...Co-opting the cellular machinery for protein production is a compulsory requirement for viruses. The Cricket Paralysis Virus employs an Internal Ribosomal Entry Site (CrPV-IRES) to express its structural genes in the late stage of infection. Ribosome hijacking is achieved by a sophisticated use of molecular mimicry to tRNA and mRNA, employed to manipulate intrinsically dynamic components of the ribosome. Binding and translocation through the ribosome is required for this IRES to initiate translation. We report two structures, solved by single particle electron cryo-microscopy (cryoEM), of a double translocated CrPV-IRES with aminoacyl-tRNA in the peptidyl site (P site) of the ribosome. CrPV-IRES adopts a previously unseen conformation, mimicking the acceptor stem of a canonical E site tRNA. The structures suggest a mechanism for the positioning of the first aminoacyl-tRNA shared with the distantly related Hepatitis C Virus IRES.
Mass: 49120.797 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: ETF1, ERF1, RF1, SUP45L1 / Production host: Escherichia coli (E. coli) / References: UniProt: P62495
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Protein/peptide , 1 types, 1 molecules n
#39: Protein/peptide
eL41
Mass: 3473.451 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
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RNA chain , 6 types, 6 molecules 578234
#45: RNA chain
28SrRNA / 28S ribosomal RNA
Mass: 1164731.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
#46: RNA chain
5SrRNA / 5S ribosomal RNA
Mass: 38385.750 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: REF: 1304938343
#47: RNA chain
5.8SrRNA / 5.8S ribosomal RNA
Mass: 48545.672 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
#49: RNA chain
18SrRNA / 18S ribosomal RNA
Mass: 547733.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
#50: RNA chain
P-tRNA
Mass: 28094.645 Da / Num. of mol.: 1 / Source method: obtained synthetically Details: RNA was prepared by in vitro transcription with T7 RNA polymerase Source: (synth.) Escherichia coli (E. coli) / References: GenBank: 1370526504
#85: RNA chain
CrPV-IRES
Mass: 62075.523 Da / Num. of mol.: 1 / Source method: obtained synthetically Details: RNA was prepared by in vitro transcription with T7 RNA polymerase Source: (synth.) Cricket paralysis virus
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Experimental details
-
Experiment
Experiment
Method: ELECTRON MICROSCOPY
EM experiment
Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction
-
Sample preparation
Component
Name: Mammalian 80S ribosome in complex with a double translocated CrPV IRES, P-site tRNA and eRF1 Type: RIBOSOME Details: Mammalian 80S ribosome in complex with a double translocated CrPV IRES, P-site tRNA and eRF1 Entity ID: all / Source: NATURAL
Molecular weight
Value: 5 MDa / Experimental value: NO
Source (natural)
Organism: Oryctolagus cuniculus (rabbit)
Source (recombinant)
Organism: Escherichia coli (E. coli)
Buffer solution
pH: 7.4
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
Microscopy
Model: FEI TITAN KRIOS
Electron gun
Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN
Electron lens
Mode: BRIGHT FIELDBright-field microscopy
Image recording
Electron dose: 64 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)
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Processing
EM software
ID
Name
Version
Category
12
RELION
2
3Dreconstruction
13
REFMAC
5
modelrefinement
CTF correction
Type: NONE
Symmetry
Point symmetry: C1 (asymmetric)
3D reconstruction
Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 75654 / Symmetry type: POINT
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