EMDB-9704: Cryo-EM structure of the HCV IRES dependently initiated CMV-stall...

Basic information

• Entry: Database: EMDB / ID: EMD-9704
• Title: Cryo-EM structure of the HCV IRES dependently initiated CMV-stalled 80S ribosome, rotated (Structure v)

Sample

• Complex: Human 80S ribosome

Function / homology

Function:

translation termination factor activity / translation release factor complex / cytoplasmic translational termination / regulation of translational termination / translation release factor activity / translation release factor activity, codon specific / translation at presynapse / response to insecticide / protein methylation / sequence-specific mRNA binding / regulation of translation involved in cellular response to UV / eukaryotic 80S initiation complex / ribosomal protein import into nucleus / negative regulation of endoplasmic reticulum unfolded protein response / regulation of G1 to G0 transition / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / peptidyl-tRNA hydrolase activity / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / protein-DNA complex disassembly / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / positive regulation of respiratory burst involved in inflammatory response / positive regulation of gastrulation / protein tyrosine kinase inhibitor activity / IRE1-RACK1-PP2A complex / positive regulation of Golgi to plasma membrane protein transport / nucleolus organization / TNFR1-mediated ceramide production / negative regulation of formation of translation preinitiation complex / positive regulation of DNA damage response, signal transduction by p53 class mediator / positive regulation of ubiquitin-protein transferase activity / GAIT complex / positive regulation of DNA-templated transcription initiation / negative regulation of RNA splicing / negative regulation of DNA repair / TORC2 complex binding / G1 to G0 transition / PD-L1(CD274) glycosylation and translocation to plasma membrane / Enterobacterial factors antagonize host defense / erythrocyte homeostasis / supercoiled DNA binding / regulation of establishment of cell polarity / cysteine-type endopeptidase activator activity involved in apoptotic process / oxidized purine DNA binding / NF-kappaB complex / cytoplasmic translational initiation / rRNA modification in the nucleus and cytosol / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / negative regulation of phagocytosis / negative regulation of bicellular tight junction assembly / ubiquitin-like protein conjugating enzyme binding / cytoplasmic side of rough endoplasmic reticulum membrane / Formation of the ternary complex, and subsequently, the 43S complex / laminin receptor activity / negative regulation of myoblast fusion / ion channel inhibitor activity / protein kinase A binding / positive regulation of mitochondrial depolarization / male meiosis I / Ribosomal scanning and start codon recognition / PELO:HBS1L and ABCE1 dissociate a ribosome on a non-stop mRNA / Translation initiation complex formation / negative regulation of Wnt signaling pathway / Dengue Virus Genome Translation and Replication / Maturation of DENV proteins / fibroblast growth factor binding / ZNF598 and the Ribosome-associated Quality Trigger (RQT) complex dissociate a ribosome stalled on a no-go mRNA / Protein hydroxylation / TOR signaling / BH3 domain binding / negative regulation of translational frameshifting / iron-sulfur cluster binding / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / monocyte chemotaxis / mTORC1-mediated signalling / SARS-CoV-1 modulates host translation machinery / regulation of cell division / positive regulation of GTPase activity / Peptide chain elongation / cellular response to ethanol / protein targeting / Selenocysteine synthesis / Dengue Virus Attachment and Entry / Formation of a pool of free 40S subunits / negative regulation of protein binding / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / Eukaryotic Translation Termination / negative regulation of respiratory burst involved in inflammatory response / protein serine/threonine kinase inhibitor activity / protein localization to nucleus / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / AMPK-induced ERAD and lysosome mediated degradation of PD-L1(CD274) / negative regulation of ubiquitin-dependent protein catabolic process / ubiquitin ligase inhibitor activity / Viral mRNA Translation / 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)

Domain/homology:

Peptide chain release factor eRF1/aRF1 / eRF1, domain 1 / eRF1 domain 1 / eRF1 domain 2 / eRF1 domain 2 / eRF1 domain 1/Pelota-like / eRF1 domain 3 / eRF1, domain 2 superfamily / eRF1 domain 3 / eRF1_1 / 40S ribosomal protein SA / Ribosomal protein L6, N-terminal / Ribosomal protein L6, N-terminal domain / 40S ribosomal protein SA, C-terminal domain / 40S ribosomal protein SA C-terminus / Ubiquitin-like protein FUBI / Ribosomal protein L30e / Ribosomal protein L28e / Ribosomal L15/L27a, N-terminal / : / Ribosomal L28e/Mak16 / Ribosomal L28e protein family / Ribosomal protein L23 / Ribosomal protein L2, archaeal-type / metallochaperone-like domain / TRASH domain / : / Ribosomal protein S26e signature. / Ribosomal protein L41 / Ribosomal protein L41 / Ribosomal protein L13e, conserved site / Ribosomal protein L13e signature. / Ribosomal protein S21e, conserved site / Ribosomal protein S21e signature. / : / Ribosomal protein S12e signature. / Ribosomal protein L29e / Ribosomal L29e protein family / Ribosomal protein S26e / Ribosomal protein S26e superfamily / Ribosomal protein S26e / Ribosomal protein S12e / Small (40S) ribosomal subunit Asc1/RACK1 / Ribosomal protein L27e, conserved site / Ribosomal protein L27e signature. / Ribosomal protein L22e / Ribosomal protein L22e superfamily / Ribosomal L22e protein family / Ribosomal protein L13e / Ribosomal protein L13e / : / Ribosomal protein L38e / Ribosomal protein L38e superfamily / Ribosomal L38e protein family / Ribosomal protein L6e signature. / Ribosomal protein S5, eukaryotic/archaeal / Ribosomal protein S21e / Ribosomal protein S21e superfamily / Ribosomal protein S21e / Ribosomal protein L19, eukaryotic / Ribosomal protein S19e, conserved site / Ribosomal protein S19e signature. / Ribosomal protein S2, eukaryotic / 60S ribosomal protein L18a/ L20, eukaryotes / Ribosomal protein L10e, conserved site / 40S Ribosomal protein S10 / Ribosomal protein L10e signature. / Ribosomal protein L18/L18-A/B/e, conserved site / Ribosomal protein L18e signature. / S27a-like superfamily / Ribosomal protein L44e signature. / Plectin/S10, N-terminal / Ribosomal protein L24e, conserved site / Ribosomal protein L19/L19e conserved site / Plectin/S10 domain / Ribosomal protein L19e signature. / Ribosomal protein L24e signature. / Ribosomal protein L5 eukaryotic, C-terminal / Ribosomal L18 C-terminal region / Ribosomal protein L23/L25, N-terminal / Ribosomal protein L23, N-terminal domain / Ribosomal protein L10e / Ribosomal protein L34e, conserved site / Ribosomal protein L34e signature. / Ribosomal protein S30 / Ribosomal protein S30 / Ribosomal L40e family / Ribosomal protein L36e signature. / Ribosomal protein S10, eukaryotic/archaeal / Ribosomal protein L30e signature 1. / Eukaryotic Ribosomal Protein L27, KOW domain / Ribosomal protein S25 / S25 ribosomal protein / Ribosomal protein L27e / Ribosomal protein L27e superfamily / Ribosomal L27e protein family / Ribosomal Protein L6, KOW domain / 50S ribosomal protein L18Ae/60S ribosomal protein L20 and L18a / : / Ribosomal protein L35Ae, conserved site

Component:

Small ribosomal subunit protein eS17 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS5 / Large ribosomal subunit protein eL33 / Large ribosomal subunit protein uL30 / Large ribosomal subunit protein uL22 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein eS12 / Large ribosomal subunit protein eL13 / Large ribosomal subunit protein uL6 / Large ribosomal subunit protein eL22 / Large ribosomal subunit protein uL4 / Small ribosomal subunit protein eS19 / Large ribosomal subunit protein uL3 / Large ribosomal subunit protein uL13 / Small ribosomal subunit protein eS27 / Large ribosomal subunit protein uL29 / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein uL18 / Large ribosomal subunit protein eL21 / Large ribosomal subunit protein eL28 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein eS10 / Large ribosomal subunit protein eL29 / Large ribosomal subunit protein eL34 / Large ribosomal subunit protein eL14 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein eS1 / Large ribosomal subunit protein uL24 / Large ribosomal subunit protein eL15 / Large ribosomal subunit protein eL27 / Large ribosomal subunit protein eL43 / Large ribosomal subunit protein eL37 / Small ribosomal subunit protein eS7 / Small ribosomal subunit protein eS8 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein uS17 / Large ribosomal subunit protein eL8 / Eukaryotic peptide chain release factor subunit 1 / Small ribosomal subunit protein eS4, X isoform / Large ribosomal subunit protein uL23 / Small ribosomal subunit protein eS6 / Large ribosomal subunit protein uL14 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein eS24 / Small ribosomal subunit protein eS25 / Small ribosomal subunit protein eS26 / Small ribosomal subunit protein eS28 / Ubiquitin-like FUBI-ribosomal protein eS30 fusion protein / Large ribosomal subunit protein eL30 / Large ribosomal subunit protein eL39 / Large ribosomal subunit protein eL31 / Large ribosomal subunit protein eL32 / Large ribosomal subunit protein uL5 / Large ribosomal subunit protein uL2 / Small ribosomal subunit protein eS32 / Ubiquitin-ribosomal protein eS31 fusion protein / Ubiquitin-ribosomal protein eL40 fusion protein / Large ribosomal subunit protein eL38 / Small ribosomal subunit protein eS21 / Small ribosomal subunit protein RACK1 / Large ribosomal subunit protein eL24 / Large ribosomal subunit protein eL42 / Large ribosomal subunit protein eL19 / Large ribosomal subunit protein eL20 / Large ribosomal subunit protein eL6 / Large ribosomal subunit protein eL18 / Ribosomal protein uL16-like / Large ribosomal subunit protein eL36

• Biological species: Homo sapiens (human)
• Method: single particle reconstruction / cryo EM / Resolution: 4.6 Å
• Authors: Yokoyama T / Shigematsu H / Shirouzu M / Imataka H / Ito T
• Citation: Journal: Mol Cell / Year: 2019; Title: HCV IRES Captures an Actively Translating 80S Ribosome.; Authors: Takeshi Yokoyama / Kodai Machida / Wakana Iwasaki / Tomoaki Shigeta / Madoka Nishimoto / Mari Takahashi / Ayako Sakamoto / Mayumi Yonemochi / Yoshie Harada / Hideki Shigematsu / Mikako Shirouzu / Hisashi Tadakuma / Hiroaki Imataka / Takuhiro Ito / ; Abstract: Translation initiation of hepatitis C virus (HCV) genomic RNA is induced by an internal ribosome entry site (IRES). Our cryoelectron microscopy (cryo-EM) analysis revealed that the HCV IRES binds to the solvent side of the 40S platform of the cap-dependently translating 80S ribosome. Furthermore, we obtained the cryo-EM structures of the HCV IRES capturing the 40S subunit of the IRES-dependently translating 80S ribosome. In the elucidated structures, the HCV IRES "body," consisting of domain III except for subdomain IIIb, binds to the 40S subunit, while the "long arm," consisting of domain II, remains flexible and does not impede the ongoing translation. Biochemical experiments revealed that the cap-dependently translating ribosome becomes a better substrate for the HCV IRES than the free ribosome. Therefore, the HCV IRES is likely to efficiently induce the translation initiation of its downstream mRNA with the captured translating ribosome as soon as the ongoing translation terminates.

History

Deposition	Nov 2, 2018	-
Header (metadata) release	May 29, 2019	-
Map release	May 29, 2019	-
Update	Jul 3, 2019	-
Current status	Jul 3, 2019	Processing site: PDBj / Status: Released

Map

• File: Download / File: emd_9704.map.gz / Format: CCP4 / Size: 282.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
• Voxel size: X=Y=Z: 1.49 Å

Density

Contour Level	By AUTHOR: 0.033 / Movie #1: 0.04
Minimum - Maximum	-0.11263685 - 0.22990444
Average (Standard dev.)	0.00020026369 (±0.010811215)

• Symmetry: Space group: 1

Details

EMDB XML:

Map geometry	Axis order X Y Z Origin 0 0 0 Dimensions 420 420 420 Spacing 420 420 420
Cell	A=B=C: 625.8 Å α=β=γ: 90.0 °

CCP4 map header:

mode	Image stored as Reals
Å/pix. X/Y/Z	1.49	1.49	1.49
M x/y/z	420	420	420
origin x/y/z	0.000	0.000	0.000
length x/y/z	625.800	625.800	625.800
α/β/γ	90.000	90.000	90.000
start NX/NY/NZ	-100	-100	-99
NX/NY/NZ	200	200	200
MAP C/R/S	1	2	3
start NC/NR/NS	0	0	0
NC/NR/NS	420	420	420
D min/max/mean	-0.113	0.230	0.000

Supplemental data

Sample components

Entire : Human 80S ribosome

• Entire: Name: Human 80S ribosome

Components

• Complex: Human 80S ribosome

Supramolecule #1: Human 80S ribosome

• Supramolecule: Name: Human 80S ribosome / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#84
• Source (natural): Organism: Homo sapiens (human)

Experimental details

Structure determination

• Method: cryo EM
• Processing: single particle reconstruction
• Aggregation state: particle

Sample preparation

• Buffer: pH: 7.5
• Grid: Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: CONTINUOUS
• Vitrification: Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

Electron microscopy

• Microscope: FEI TECNAI ARCTICA
• Image recording: Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 50.0 e/Ų
• Electron beam: Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
• Electron optics: C2 aperture diameter: 50.0 µm / Calibrated magnification: 33557 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal magnification: 23500
• Sample stage: Cooling holder cryogen: NITROGEN
• Experimental equipment: Model: Talos Arctica / Image courtesy: FEI Company

Image processing

• Final reconstruction: Applied symmetry - Point group: C₁ (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 2) / Number images used: 23546
• Initial angle assignment: Type: MAXIMUM LIKELIHOOD
• Final angle assignment: Type: MAXIMUM LIKELIHOOD