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Detection of Heterodimerization of Protein Isoforms Using an in Situ Proximity Ligation Assay
Published on: October 20, 2018
Signaling chain homooligomerization (SCHOOL) model
1Department of Pathology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655, USA. alexander.sigalov@umassmed.edu
Advances in Experimental Medicine and Biology
|December 11, 2008
Summary
The novel Signaling Chain Homooligomerization (SCHOOL) model explains how multichain immune recognition receptors (MIRRs) initiate signaling. It proposes ligand-induced interactions between subunits and receptor oligomerization trigger cellular responses.
Area of Science:
- Immunology
- Cell Biology
- Biochemistry
Background:
- Multichain immune recognition receptors (MIRRs) are surface receptors on hematopoietic cells.
- MIRRs have distinct structural features with separate extracellular recognition and intracellular signaling domains.
- The precise mechanism initiating MIRR signal transduction upon ligand binding remains unclear.
Purpose of the Study:
- To introduce a novel mechanistic model for MIRR-mediated signal transduction.
- To explain the initiation of MIRR signaling cascades.
- To provide a framework for understanding structurally related membrane receptors.
Main Methods:
- Description of the Signaling Chain Homooligomerization (SCHOOL) model.
- Focus on ligand-induced intrareceptor and interreceptor protein-protein interactions.
- Emphasis on the formation of oligomeric signaling structures.
Main Results:
- The SCHOOL model posits that MIRR triggering results from ligand-induced interplay between subunits.
- Intrareceptor interactions stabilize receptor integrity.
- Interreceptor homointeractions lead to signaling complex formation and cascade initiation.
Conclusions:
- The SCHOOL model offers a plausible and testable explanation for MIRR signaling initiation.
- It highlights the role of specific protein-protein interactions in transmembrane signaling.
- The model's principles have broad applications in immunology and cell biology.
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