8YNM

Structure of the Caspase-8/cFLIP death effector domain assembly


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.49 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Reverse hierarchical DED assembly in the cFLIP-procaspase-8 and cFLIP-procaspase-8-FADD complexes.

Yang, C.Y.Tseng, Y.C.Tu, Y.F.Kuo, B.J.Hsu, L.C.Lien, C.I.Lin, Y.S.Wang, Y.T.Lu, Y.C.Su, T.W.Lo, Y.C.Lin, S.C.

(2024) Nat Commun 15: 8974-8974

  • DOI: https://doi.org/10.1038/s41467-024-53306-1
  • Primary Citation of Related Structures:  
    8YM4, 8YM5, 8YM6, 8YNI, 8YNK, 8YNL, 8YNM, 8YNN

  • PubMed Abstract: 

    cFLIP, a master anti-apoptotic regulator, targets the FADD-induced DED complexes of procaspase-8 in death receptor and ripoptosome signaling pathways. Several tumor cells maintain relatively high levels of cFLIP in achieving their immortality. However, understanding the three-dimensional regulatory mechanism initiated or mediated by elevated levels of cFLIP has been limited by the absence of the atomic coordinates for cFLIP-induced DED complexes. Here we report the crystal plus cryo-EM structures to uncover an unconventional mechanism where cFLIP and procaspase-8 autonomously form a binary tandem DED complex, independent of FADD. This complex gains the ability to recruit FADD, thereby allosterically modulating cFLIP assembly and partially activating caspase-8 for RIPK1 cleavage. Our structure-guided mutagenesis experiments provide critical insights into these regulatory mechanisms, elucidating the resistance to apoptosis and necroptosis in achieving immortality. Finally, this research offers a unified model for the intricate bidirectional hierarchy-based processes using multiprotein helical assembly to govern cell fate decisions.


  • Organizational Affiliation

    Genomics Research Center, Academia Sinica, Taipei, 11529, Taiwan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CASP8 and FADD-like apoptosis regulator subunit p43181Homo sapiensMutation(s): 0 
Gene Names: CFLARCASHCASP8AP1CLARPMRIT
UniProt & NIH Common Fund Data Resources
Find proteins for O15519 (Homo sapiens)
Explore O15519 
Go to UniProtKB:  O15519
PHAROS:  O15519
GTEx:  ENSG00000003402 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO15519
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Caspase-8 subunit p10B [auth A],
C [auth B],
D [auth C]
479Homo sapiensMutation(s): 5 
Gene Names: CASP8MCH5
EC: 3.4.22.61
UniProt & NIH Common Fund Data Resources
Find proteins for Q14790 (Homo sapiens)
Explore Q14790 
Go to UniProtKB:  Q14790
PHAROS:  Q14790
GTEx:  ENSG00000064012 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14790
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.49 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.20.1_4487:
RECONSTRUCTIONcryoSPARC

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other governmentTaiwan--

Revision History  (Full details and data files)

  • Version 1.0: 2024-10-30
    Type: Initial release