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Measuring Composition of CD95 Death-Inducing Signaling Complex and Processing of Procaspase-8 in this Complex
Published on: August 2, 2021
Precise mapping of the CD95 pre-ligand assembly domain
Valérie Edmond1, Benoist Ghali, Aubin Penna
1Université de Rennes-1, Rennes, France.
Plos One
|October 11, 2012
Summary
The pre-ligand assembly domain (PLAD) of CD95 is crucial for cell death signaling. A specific region within PLAD (amino acids 43-66) is essential for CD95 homotypic interaction and apoptosis.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- CD95 (APO-1/Fas) is a death receptor essential for regulating apoptosis.
- Efficient CD95 signaling requires its pre-association at the plasma membrane via the pre-ligand assembly domain (PLAD).
Purpose of the Study:
- To identify the minimal functional motif within the CD95 PLAD responsible for homotypic interactions and apoptotic signaling.
- To investigate the role of specific regions within the PLAD in CD95 multimerization and signal transduction.
Main Methods:
- Utilized novel molecular and cellular tools to analyze CD95 mutants.
- Investigated CD95 homo- and hetero-oligomerization (human/mouse).
- Assessed the impact of PLAD deletions on apoptotic signal transmission.
Main Results:
- CD95 mutants lacking the entire PLAD (amino acids 1-66) failed to interact and induce cell death.
- Deletion of amino acids 1-42 did not impede CD95 oligomerization or apoptotic signaling.
- The region spanning amino acids 43-66 represents the minimal motif for CD95 homotypic interaction and efficient apoptotic signaling.
Conclusions:
- The CD95 PLAD region between amino acids 43-66 is critical for homotypic interactions and apoptosis.
- Targeting this minimal PLAD motif could offer a therapeutic strategy for modulating CD95-mediated signals.
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