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Updated: Nov 5, 2025
Identifying Protein-protein Interaction Sites Using Peptide Arrays
Published on: November 18, 2014
A comprehensive interaction study provides a potential domain interaction network of human death domain superfamily
Wei Zhou1,2, Naoe Kaneko1,3, Tomoya Nakagita2
1Department of Analytical Pathology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan.
Abstract:
Human death domain superfamily proteins (DDSPs) play important roles in many signaling pathways involved in cell death and inflammation. Disruption or constitutive activation of these DDSP interactions due to inherited gene mutations is closely related to immunodeficiency and/or autoinflammatory diseases; however, responsible gene mutations have not been found in phenotypical diagnosis of these diseases. In this study, we comprehensively investigated the interactions of death-fold domains to explore the signaling network mediated by human DDSPs. We obtained 116 domains of DDSPs and conducted a domain-domain interaction assay of 13,924 reactions in duplicate using amplified luminescent proximity homogeneous assay. The data were mostly consistent with previously reported interactions. We also found new possible interactions, including an interaction between the caspase recruitment domain (CARD) of CARD10 and the tandem CARD-CARD domain of NOD2, which was confirmed by reciprocal co-immunoprecipitation. This study enables prediction of the interaction network of human DDSPs, sheds light on pathogenic mechanisms, and will facilitate identification of drug targets for treatment of immunodeficiency and autoinflammatory diseases.
Insights
This study maps human death domain superfamily protein (DDSP) interactions, revealing new connections like CARD10 and NOD2. This network mapping aids understanding of immune diseases and identifies potential drug targets.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- Human death domain superfamily proteins (DDSPs) are crucial in cell death and inflammation signaling.
- Mutations in DDSP interactions are linked to immunodeficiency and autoinflammatory diseases, but specific genes are often unidentified.
Purpose of the Study:
- To comprehensively investigate human DDSP interactions and map their signaling network.
- To identify novel DDSP interactions and their potential roles in disease pathogenesis.
Main Methods:
- Utilized amplified luminescent proximity homogeneous assay for domain-domain interaction assays.
- Tested 116 DDSP domains across 13,924 unique interactions.
- Confirmed novel interactions, such as CARD10-NOD2, using reciprocal co-immunoprecipitation.
Main Results:
- Validated previously known DDSP interactions.
- Discovered novel interactions, notably between CARD10's caspase recruitment domain (CARD) and NOD2's tandem CARD-CARD domain.
- Established a comprehensive interaction network for human DDSPs.
Conclusions:
- The study provides a detailed map of the human DDSP interaction network.
- Findings illuminate pathogenic mechanisms underlying immunodeficiency and autoinflammatory diseases.
- Identified potential drug targets for treating immune-related disorders.
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