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- PDB-8jol: cryo-EM structure of the CED-4/CED-3 holoenzyme -

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Basic information

Entry
Database: PDB / ID: 8jol
Titlecryo-EM structure of the CED-4/CED-3 holoenzyme
Components
  • Cell death protein 3
  • Cell death protein 4
KeywordsAPOPTOSIS / CED-4 / CED-3 / holoenzyme
Function / homology
Function and homology information


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 / Signaling by Hippo / Caspase-mediated cleavage of cytoskeletal proteins / Caspase activation via Dependence Receptors in the absence of ligand / Regulation of TNFR1 signaling / Apoptotic cleavage of cell adhesion proteins / positive regulation of egg-laying behavior ...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 / Signaling by Hippo / Caspase-mediated cleavage of cytoskeletal proteins / Caspase activation via Dependence Receptors in the absence of ligand / Regulation of TNFR1 signaling / Apoptotic cleavage of cell adhesion proteins / positive regulation of egg-laying behavior / BH1 domain binding / regulation of vulval development / positive regulation of apoptotic process involved in development / regulation of development, heterochronic / positive regulation of synapse pruning / caspase complex / peptidase activator activity involved in apoptotic process / caspase-7 / regulation of cell fate specification / positive regulation of protein processing / caspase binding / embryonic morphogenesis / programmed cell death / apoptotic process involved in development / negative regulation of execution phase of apoptosis / actin filament depolymerization / activation of cysteine-type endopeptidase activity / cysteine-type endopeptidase activity involved in execution phase of apoptosis / embryo development ending in birth or egg hatching / execution phase of apoptosis / regulation of locomotion / regulation of cell size / muscle cell cellular homeostasis / regulation of synapse organization / BH3 domain binding / cysteine-type endopeptidase activator activity involved in apoptotic process / protein autoprocessing / endopeptidase activator activity / regulation of cell adhesion / ADP binding / protein catabolic process / regulation of protein stability / activation of cysteine-type endopeptidase activity involved in apoptotic process / positive regulation of neuron apoptotic process / presynapse / perikaryon / nuclear membrane / endopeptidase activity / defense response to Gram-negative bacterium / 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 / membrane / identical protein binding / nucleus / cytosol / cytoplasm
Similarity search - Function
Apoptosis regulator, Ced-4 / NB-ARC / NB-ARC domain / Caspase recruitment domain / CARD domain / CARD caspase recruitment domain profile. / Caspase recruitment domain / Peptidase family C14A, His active site / Caspase family histidine active site. / Peptidase C14, caspase non-catalytic subunit p10 ...Apoptosis regulator, Ced-4 / NB-ARC / NB-ARC domain / Caspase recruitment domain / CARD domain / CARD caspase recruitment domain profile. / Caspase recruitment domain / Peptidase family C14A, His active site / Caspase family histidine active site. / Peptidase C14, caspase non-catalytic subunit p10 / Peptidase family C14A, cysteine active site / Caspase family cysteine active site. / Caspase family p10 domain profile. / Peptidase C14A, caspase catalytic domain / Caspase, interleukin-1 beta converting enzyme (ICE) homologues / Peptidase C14, p20 domain / Caspase family p20 domain profile. / : / Caspase domain / Caspase-like domain superfamily / Death-like domain superfamily / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ADENOSINE-5'-TRIPHOSPHATE / Cell death protein 4 / Cell death protein 3
Similarity search - Component
Biological speciesCaenorhabditis elegans (invertebrata)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å
AuthorsLi, Y. / Tian, L. / Zhang, Y. / Shi, Y.
Funding support China, 1items
OrganizationGrant numberCountry
Other private China
Citation
Journal: Life Sci Alliance / Year: 2023
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.
#1: Journal: Life Sci Alliance / Year: 2023
Title: Structural insights into CED-3 activation
Authors: Li, Y. / Tian, L. / Zhang, Y. / Shi, Y.
History
DepositionJun 7, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jun 28, 2023Provider: repository / Type: Initial release
Revision 1.1Jul 5, 2023Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.title / _citation.year
Revision 1.2Aug 2, 2023Group: Database references / Category: citation / citation_author
Revision 1.3Nov 15, 2023Group: Data collection / Source and taxonomy / Category: chem_comp_atom / chem_comp_bond / entity_src_gen
Item: _entity_src_gen.pdbx_gene_src_ncbi_taxonomy_id / _entity_src_gen.pdbx_gene_src_scientific_name ..._entity_src_gen.pdbx_gene_src_ncbi_taxonomy_id / _entity_src_gen.pdbx_gene_src_scientific_name / _entity_src_gen.pdbx_host_org_ncbi_taxonomy_id / _entity_src_gen.pdbx_host_org_scientific_name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Cell death protein 4
B: Cell death protein 4
C: Cell death protein 3
hetero molecules


Theoretical massNumber of molelcules
Total (without water)183,6637
Polymers182,6003
Non-polymers1,0634
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Cell death protein 4 /


Mass: 62953.266 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Caenorhabditis elegans (invertebrata) / Gene: ced-4, C35D10.9 / Production host: Escherichia coli (E. coli) / References: UniProt: P30429
#2: Protein Cell death protein 3 / / Caspase ced-3


Mass: 56693.902 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Caenorhabditis elegans (invertebrata) / Gene: ced-3, C48D1.2 / Production host: Escherichia coli (E. coli) / References: UniProt: P42573, caspase-7
#3: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE / Adenosine triphosphate


Mass: 507.181 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Feature type: SUBJECT OF INVESTIGATION / Comment: ATP, energy-carrying molecule*YM
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: ternary complex of CED-4 with CED-3 CARD and CED-3 catalytic domain
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Caenorhabditis elegans (invertebrata)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2000 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 115378 / Symmetry type: POINT

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