+
Open data
-
Basic information
Entry | Database: PDB / ID: 6k71 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | eIF2 - eIF2B complex | |||||||||
![]() |
| |||||||||
![]() | ![]() ![]() | |||||||||
Function / homology | ![]() male germ cell proliferation / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ![]() ![]() ![]() | |||||||||
![]() | Kashiwagi, K. / Yokoyama, T. / Ito, T. | |||||||||
Funding support | ![]()
| |||||||||
![]() | ![]() Title: Structural basis for eIF2B inhibition in integrated stress response. Authors: Kazuhiro Kashiwagi / Takeshi Yokoyama / Madoka Nishimoto / Mari Takahashi / Ayako Sakamoto / Mayumi Yonemochi / Mikako Shirouzu / Takuhiro Ito / ![]() Abstract: A core event in the integrated stress response, an adaptive pathway common to all eukaryotic cells in response to various stress stimuli, is the phosphorylation of eukaryotic translation initiation ...A core event in the integrated stress response, an adaptive pathway common to all eukaryotic cells in response to various stress stimuli, is the phosphorylation of eukaryotic translation initiation factor 2 (eIF2). Normally, unphosphorylated eIF2 transfers the methionylated initiator tRNA to the ribosome in a guanosine 5'-triphosphate-dependent manner. By contrast, phosphorylated eIF2 inhibits its specific guanine nucleotide exchange factor, eIF2B. To elucidate how the eIF2 phosphorylation status regulates the eIF2B activity, we determined cryo-electron microscopic and crystallographic structures of eIF2B in complex with unphosphorylated or phosphorylated eIF2. The unphosphorylated and phosphorylated forms of eIF2 bind to eIF2B in completely different manners: the nucleotide exchange-active and -inactive modes, respectively. These structures explain how phosphorylated eIF2 dominantly inhibits the nucleotide exchange activity of eIF2B. | |||||||||
History |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | Molecule: ![]() ![]() |
-
Downloads & links
-
Download
PDBx/mmCIF format | ![]() | 737.1 KB | Display | ![]() |
---|---|---|---|---|
PDB format | ![]() | 592.5 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
---|
-Related structure data
Related structure data | ![]() 9840MC ![]() 9841C ![]() 9842C ![]() 6jlyC ![]() 6jlzC ![]() 6k72C M: map data used to model this data C: citing same article ( |
---|---|
Similar structure data |
-
Links
-
Assembly
Deposited unit | ![]()
|
---|---|
1 |
|
-
Components
-Translation initiation factor eIF-2B subunit ... , 5 types, 10 molecules ABCDEFGHIJ
#1: Protein | Mass: 33754.148 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() #2: Protein | Mass: 39039.547 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() #3: Protein | Mass: 50304.230 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() #4: Protein | Mass: 57640.168 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() #5: Protein | Mass: 80466.609 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
---|
-Eukaryotic translation initiation factor 2 subunit ... , 3 types, 3 molecules KMP
#6: Protein | Mass: 36161.180 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
---|---|
#7: Protein | Mass: 38454.484 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#8: Protein | Mass: 51178.406 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
-Experimental details
-Experiment
Experiment | Method: ![]() |
---|---|
EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
-
Sample preparation
Component | Name: eIF2 - eIF2B complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
---|---|
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() |
Vitrification![]() | Cryogen name: ETHANE |
-
Electron microscopy imaging
Experimental equipment | ![]() Model: Talos Arctica / Image courtesy: FEI Company |
---|---|
Microscopy | Model: FEI TECNAI ARCTICA |
Electron gun | Electron source![]() ![]() |
Electron lens | Mode: BRIGHT FIELD![]() |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-
Processing
CTF correction![]() | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
---|---|
Symmetry | Point symmetry![]() |
3D reconstruction![]() | Resolution: 4.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 82123 / Symmetry type: POINT |