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Open data
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Basic information
Entry | Database: PDB / ID: 8jns | ||||||
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Title | cryo-EM structure of a CED-4 hexamer | ||||||
![]() | Cell death protein 4 | ||||||
![]() | APOPTOSIS / CED-4 apoptosome / Hexamer | ||||||
Function / homology | ![]() BH1 domain binding / positive regulation of apoptotic process involved in development / regulation of development, heterochronic / caspase complex / positive regulation of synapse pruning / peptidase activator activity involved in apoptotic process / positive regulation of protein processing / caspase binding / embryonic morphogenesis / apoptotic process involved in development ...BH1 domain binding / positive regulation of apoptotic process involved in development / regulation of development, heterochronic / caspase complex / positive regulation of synapse pruning / peptidase activator activity involved in apoptotic process / positive regulation of protein processing / caspase binding / embryonic morphogenesis / apoptotic process involved in development / negative regulation of execution phase of apoptosis / actin filament depolymerization / activation of cysteine-type endopeptidase activity / embryo development ending in birth or egg hatching / regulation of cell size / muscle cell cellular homeostasis / BH3 domain binding / cysteine-type endopeptidase activator activity involved in apoptotic process / endopeptidase activator activity / regulation of cell adhesion / regulation of protein stability / activation of cysteine-type endopeptidase activity involved in apoptotic process / ADP binding / defense response to Gram-negative bacterium / positive regulation of apoptotic process / negative regulation of apoptotic process / apoptotic process / perinuclear region of cytoplasm / magnesium ion binding / protein-containing complex / mitochondrion / ATP binding / identical protein binding / membrane / nucleus / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.2 Å | ||||||
![]() | Li, Y. / Shi, Y. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural insights into CED-3 activation. Authors: Yini Li / Lu Tian / Ying Zhang / Yigong Shi / ![]() Abstract: In , onset of programmed cell death is marked with the activation of CED-3, a process that requires assembly of the CED-4 apoptosome. Activated CED-3 forms a holoenzyme with the CED-4 apoptosome to ...In , onset of programmed cell death is marked with the activation of CED-3, a process that requires assembly of the CED-4 apoptosome. Activated CED-3 forms a holoenzyme with the CED-4 apoptosome to cleave a wide range of substrates, leading to irreversible cell death. Despite decades of investigations, the underlying mechanism of CED-4-facilitated CED-3 activation remains elusive. Here, we report cryo-EM structures of the CED-4 apoptosome and three distinct CED-4/CED-3 complexes that mimic different activation stages for CED-3. In addition to the previously reported octamer in crystal structures, CED-4, alone or in complex with CED-3, exists in multiple oligomeric states. Supported by biochemical analyses, we show that the conserved CARD-CARD interaction promotes CED-3 activation, and initiation of programmed cell death is regulated by the dynamic organization of the CED-4 apoptosome. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 607.8 KB | Display | ![]() |
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PDB format | ![]() | 492.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 36450MC ![]() 8jo0C ![]() 8jolC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 62953.266 Da / Num. of mol.: 9 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #2: Chemical | ChemComp-MG / #3: Chemical | ChemComp-ATP / Has ligand of interest | Y | |
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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: CED-4 hexamer / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
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 |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1500 nm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 125140 / Symmetry type: POINT |