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Open data
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Basic information
| Entry | Database: PDB / ID: 8jol | ||||||
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| Title | cryo-EM structure of the CED-4/CED-3 holoenzyme | ||||||
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Keywords | APOPTOSIS / CED-4 / CED-3 / holoenzyme | ||||||
| Function / homology | Function and homology informationnegative regulation of cellular response to manganese ion / positive regulation of cellular response to gamma radiation / Apoptotic cleavage of cellular proteins / Apoptosis induced DNA fragmentation / AKT phosphorylates targets in the cytosol / Signaling by Hippo / Caspase-mediated cleavage of cytoskeletal proteins / Caspase activation via Dependence Receptors in the absence of ligand / Apoptotic cleavage of cell adhesion proteins / Regulation of TNFR1 signaling ...negative regulation of cellular response to manganese ion / positive regulation of cellular response to gamma radiation / Apoptotic cleavage of cellular proteins / Apoptosis induced DNA fragmentation / AKT phosphorylates targets in the cytosol / Signaling by Hippo / Caspase-mediated cleavage of cytoskeletal proteins / Caspase activation via Dependence Receptors in the absence of ligand / Apoptotic cleavage of cell adhesion proteins / Regulation of TNFR1 signaling / BH1 domain binding / regulation of vulval development / regulation of development, heterochronic / caspase complex / positive regulation of apoptotic process involved in development / positive regulation of synapse pruning / peptidase activator activity involved in apoptotic process / caspase-7 / caspase binding / positive regulation of protein processing / embryonic morphogenesis / cysteine-type endopeptidase activator activity / regulation of cell fate specification / apoptotic process involved in development / programmed cell death / actin filament depolymerization / embryo development ending in birth or egg hatching / negative regulation of execution phase of apoptosis / cysteine-type endopeptidase activator activity involved in apoptotic process / execution phase of apoptosis / regulation of locomotion / muscle cell cellular homeostasis / regulation of cell size / regulation of synapse organization / BH3 domain binding / protein autoprocessing / endopeptidase activator activity / regulation of cell adhesion / enzyme activator activity / protein catabolic process / ADP binding / regulation of protein stability / positive regulation of neuron apoptotic process / presynapse / nuclear membrane / perikaryon / defense response to Gram-negative bacterium / endopeptidase activity / positive regulation of apoptotic process / cysteine-type endopeptidase activity / neuronal cell body / apoptotic process / negative regulation of apoptotic process / perinuclear region of cytoplasm / magnesium ion binding / protein-containing complex / mitochondrion / proteolysis / ATP binding / identical protein binding / nucleus / membrane / cytosol / cytoplasm Similarity search - Function | ||||||
| Biological species | ![]() | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å | ||||||
Authors | Li, Y. / Tian, L. / Zhang, Y. / Shi, Y. | ||||||
| Funding support | China, 1items
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Citation | Journal: Life Sci Alliance / Year: 2023Title: 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. #1: Journal: Life Sci Alliance / Year: 2023Title: Structural insights into CED-3 activation Authors: Li, Y. / Tian, L. / Zhang, Y. / Shi, Y. | ||||||
| History |
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 8jol.cif.gz | 230.5 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb8jol.ent.gz | 178 KB | Display | PDB format |
| PDBx/mmJSON format | 8jol.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 8jol_validation.pdf.gz | 1.3 MB | Display | wwPDB validaton report |
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| Full document | 8jol_full_validation.pdf.gz | 1.4 MB | Display | |
| Data in XML | 8jol_validation.xml.gz | 51.2 KB | Display | |
| Data in CIF | 8jol_validation.cif.gz | 74.8 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/jo/8jol ftp://data.pdbj.org/pub/pdb/validation_reports/jo/8jol | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 36459MC ![]() 8jnsC ![]() 8jo0C M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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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.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #2: Protein | | Mass: 56693.902 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Chemical | #4: Chemical | 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: ternary complex of CED-4 with CED-3 CARD and CED-3 catalytic domain Type: COMPLEX / Entity ID: #1-#2 / 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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| 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: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 115378 / Symmetry type: POINT |
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FIELD EMISSION GUN