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Updated: Jul 18, 2026

Measuring Composition of CD95 Death-Inducing Signaling Complex and Processing of Procaspase-8 in this Complex
Published on: August 2, 2021
CD95 (APO-1/Fas)-associating signalling proteins
M E Peter1, F C Kischkel, S Hellbardt
1German Cancer Research Center, Tumor Immunology Program, Heidelberg, Germany.
Abstract:
The CD95 (APO-1/Fas) receptor has attracted great interest in recent years because it transduces an apoptotic signal in a variety of different tissues. CD95 belongs to the NGF/TNF-receptor superfamily, members of which need to be trimerized by specific protein ligands in order to generate a signal. This review focuses on recent advances in the understanding of the proximal signal transduction mechanism of CD95. The cloning of numerous proteins that interact with CD95 and other members of this receptor family and the in vivo identification of several proteins that associate with CD95 in a ligand-dependent fashion opens the way to delineate the death pathway and to explain crosstalk among these receptors on a molecular basis.
Insights
The CD95 receptor triggers cell death signaling. Recent research identifies interacting proteins, clarifying the CD95 death pathway and receptor crosstalk at a molecular level.
Area of Science:
- Cell biology
- Molecular biology
- Immunology
Background:
- The CD95 receptor (also known as APO-1/Fas) is crucial for initiating apoptosis across various tissues.
- CD95 is a member of the nerve growth factor/tumor necrosis factor (NGF/TNF) receptor superfamily, requiring ligand-induced trimerization for signal transduction.
Purpose of the Study:
- To review recent advancements in understanding the proximal signal transduction mechanism of the CD95 receptor.
- To elucidate the molecular basis of the CD95-mediated death pathway and receptor interactions.
Main Methods:
- Literature review focusing on recent research findings.
- Analysis of studies involving the cloning of CD95-interacting proteins.
- Examination of in vivo identification of ligand-dependent CD95-associating proteins.
Main Results:
- Numerous proteins interacting with CD95 and related receptors have been identified.
- In vivo studies have revealed proteins that associate with CD95 in a ligand-dependent manner.
- These findings provide a molecular framework for understanding the CD95 death pathway.
Conclusions:
- The identification of interacting proteins is key to delineating the CD95 death pathway.
- Understanding these molecular interactions explains crosstalk among NGF/TNF receptor superfamily members.
- This knowledge advances the comprehension of apoptosis regulation and immune system signaling.
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