[English] 日本語
Yorodumi- EMDB-0651: Electron cryo-microscopy of the eukaryotic translation initiation... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-0651 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Electron cryo-microscopy of the eukaryotic translation initiation factor 2B bound to eukaryotic translation initiation factor 2 from Homo sapiens | |||||||||
Map data | ||||||||||
Sample |
| |||||||||
Keywords | eukaryotic translation initiation factor 2B / eukaryotic translation initiation factor 2 / TRANSLATION | |||||||||
Function / homology | Function and homology information regulation of translation in response to endoplasmic reticulum stress / translation initiation ternary complex / glial limiting end-foot / response to kainic acid / response to manganese-induced endoplasmic reticulum stress / positive regulation of type B pancreatic cell apoptotic process / methionyl-initiator methionine tRNA binding / eukaryotic translation initiation factor 2B complex / Response of EIF2AK1 (HRI) to heme deficiency / negative regulation of translational initiation in response to stress ...regulation of translation in response to endoplasmic reticulum stress / translation initiation ternary complex / glial limiting end-foot / response to kainic acid / response to manganese-induced endoplasmic reticulum stress / positive regulation of type B pancreatic cell apoptotic process / methionyl-initiator methionine tRNA binding / eukaryotic translation initiation factor 2B complex / Response of EIF2AK1 (HRI) to heme deficiency / negative regulation of translational initiation in response to stress / Recycling of eIF2:GDP / PERK-mediated unfolded protein response / eukaryotic translation initiation factor 2 complex / PERK regulates gene expression / regulation of translational initiation in response to stress / cytoplasmic translational initiation / translation factor activity, RNA binding / protein-synthesizing GTPase / oligodendrocyte development / guanyl-nucleotide exchange factor complex / formation of translation preinitiation complex / astrocyte development / eukaryotic 48S preinitiation complex / : / astrocyte differentiation / Formation of the ternary complex, and subsequently, the 43S complex / regulation of translational initiation / Ribosomal scanning and start codon recognition / Translation initiation complex formation / positive regulation of translational initiation / Response of EIF2AK4 (GCN2) to amino acid deficiency / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / response to glucose / stress granule assembly / translation initiation factor binding / ovarian follicle development / translational initiation / cellular response to amino acid starvation / myelination / translation initiation factor activity / response to endoplasmic reticulum stress / guanyl-nucleotide exchange factor activity / central nervous system development / hippocampus development / PKR-mediated signaling / ABC-family proteins mediated transport / response to peptide hormone / cytoplasmic stress granule / cellular response to UV / ribosome binding / regulation of translation / cellular response to heat / cellular response to oxidative stress / response to heat / T cell receptor signaling pathway / cadherin binding / positive regulation of apoptotic process / GTPase activity / synapse / GTP binding / RNA binding / extracellular exosome / ATP binding / membrane / identical protein binding / nucleus / plasma membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.03 Å | |||||||||
Authors | Nguyen HC / Kenner LR | |||||||||
Funding support | United States, 1 items
| |||||||||
Citation | Journal: Science / Year: 2019 Title: eIF2B-catalyzed nucleotide exchange and phosphoregulation by the integrated stress response. Authors: Lillian R Kenner / Aditya A Anand / Henry C Nguyen / Alexander G Myasnikov / Carolin J Klose / Lea A McGeever / Jordan C Tsai / Lakshmi E Miller-Vedam / Peter Walter / Adam Frost / Abstract: The integrated stress response (ISR) tunes the rate of protein synthesis. Control is exerted by phosphorylation of the general translation initiation factor eIF2. eIF2 is a guanosine triphosphatase ...The integrated stress response (ISR) tunes the rate of protein synthesis. Control is exerted by phosphorylation of the general translation initiation factor eIF2. eIF2 is a guanosine triphosphatase that becomes activated by eIF2B, a two-fold symmetric and heterodecameric complex that functions as eIF2's dedicated nucleotide exchange factor. Phosphorylation converts eIF2 from a substrate into an inhibitor of eIF2B. We report cryo-electron microscopy structures of eIF2 bound to eIF2B in the dephosphorylated state. The structures reveal that the eIF2B decamer is a static platform upon which one or two flexible eIF2 trimers bind and align with eIF2B's bipartite catalytic centers to catalyze nucleotide exchange. Phosphorylation refolds eIF2α, allowing it to contact eIF2B at a different interface and, we surmise, thereby sequestering it into a nonproductive complex. | |||||||||
History |
|
-Structure visualization
Movie |
Movie viewer |
---|---|
Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_0651.map.gz | 398.4 MB | EMDB map data format | |
---|---|---|---|---|
Header (meta data) | emd-0651-v30.xml emd-0651.xml | 20.3 KB 20.3 KB | Display Display | EMDB header |
Images | emd_0651.png | 423.1 KB | ||
Filedesc metadata | emd-0651.cif.gz | 8 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-0651 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-0651 | HTTPS FTP |
-Related structure data
Related structure data | 6o85MC 0649C 0664C 6o81C 6o9zC M: atomic model generated by this map C: citing same article (ref.) |
---|---|
Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
---|---|
Related items in Molecule of the Month |
-Map
File | Download / File: emd_0651.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Voxel size | X=Y=Z: 0.822 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
|
-Supplemental data
-Sample components
+Entire : eIF2 bound to eIF2B
+Supramolecule #1: eIF2 bound to eIF2B
+Macromolecule #1: Translation initiation factor eIF-2B subunit epsilon
+Macromolecule #2: Translation initiation factor eIF-2B subunit beta
+Macromolecule #3: Translation initiation factor eIF-2B subunit delta
+Macromolecule #4: Translation initiation factor eIF-2B subunit alpha
+Macromolecule #5: Translation initiation factor eIF-2B subunit gamma
+Macromolecule #6: Eukaryotic translation initiation factor 2 subunit 1
+Macromolecule #7: Eukaryotic translation initiation factor 2 subunit 3
+Macromolecule #8: Eukaryotic translation initiation factor 2 subunit beta
+Macromolecule #9: 2-(4-chloranylphenoxy)-~{N}-[4-[2-(4-chloranylphenoxy)ethanoylami...
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
---|---|
Grid | Details: unspecified |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 80.0 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: EMDB MAP |
---|---|
Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: PROJECTION MATCHING |
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.03 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 44157 |