Download MendeleyAssembly and activation of the death-inducing signaling complex.
Fosuah, E., Shen, Z., Xie, J., Wang, C., Lin, Q., Fu, T.M.(2025) Proc Natl Acad Sci U S A 122: e2504819122-e2504819122
- PubMed: 40465623
- DOI: https://doi.org/10.1073/pnas.2504819122
- Primary Citation of Related Structures:
9N94, 9NCQ - PubMed Abstract:
The death-inducing signaling complex (DISC), comprising Fas, Fas-associated death domain (FADD), and caspase-8, initiates extrinsic apoptosis. Using cryogenic electron microscopy (cryo-EM), we show that Fas and FADD death domains (DDs) form an asymmetric 7:5 oligomer, which promotes FADD death effector domain (DED) filament formation. Structural analysis reveals that FADD DED filaments closely resemble caspase-8 tandem DED filaments, suggesting that FADD DED serves as a nucleation scaffold for caspase-8 assembly. These findings provide a mechanistic framework for how DISC assembly initiates apoptosis and amplifies signaling via higher-order oligomerization.
- Department of Biological Chemistry and Pharmacology, The Ohio State University, Columbus, OH 43210.
Organizational Affiliation:
