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β-Arrestins: Multitask Scaffolds Orchestrating the Where and When in Cell Signalling
Stéphane A Laporte1,2,3,4, Mark G H Scott5,6,7
1Department of Medicine, Research Institute of the McGill University Health Center (RI-MUHC), McGill University, Montreal, QC, Canada. stephane.laporte@mcgill.ca.
Methods in Molecular Biology (Clifton, N.J.)
|March 29, 2019
Summary
Beta-arrestins (β-arrs) are key regulators of G protein-coupled receptor (GPCR) signaling and cellular processes. These multifunctional proteins act as signaling hubs, influencing cell growth, migration, and gene transcription, offering therapeutic potential.
Area of Science:
- Cellular Biology
- Molecular Signaling
- Biochemistry
Background:
- Beta-arrestins (β-arrs) were first identified for their role in G protein-coupled receptor (GPCR) desensitization and endocytosis.
- Emerging evidence reveals β-arrs as multifunctional adaptor proteins crucial for diverse signaling pathways beyond GPCRs.
Purpose of the Study:
- To review the multifaceted roles of β-arrestins in cellular regulation.
- To explore the dynamic scaffolding functions of β-arrs and their impact on signal transduction.
- To discuss the regulation, compartmentalization, and physiological/pathological significance of β-arrestins.
Main Methods:
- Literature review of studies on β-arrestin function.
- Analysis of β-arrestin interactions with GPCRs and non-receptor partners.
- Examination of β-arrestin roles in cellular processes and disease.
Main Results:
- β-arrestins act as central hubs integrating external stimuli with cellular outputs like gene transcription, cell growth, and migration.
- β-arrestins exhibit dynamic scaffolding functions influencing signal transduction and compartmentalization.
- β-arrestin regulation and activity are critical in both physiological and pathological contexts.
Conclusions:
- β-arrestins are essential regulators of GPCRs and broader cellular signaling networks.
- Their scaffolding and regulatory roles underscore their importance in cellular homeostasis and disease.
- Understanding β-arrestin dynamics offers promising therapeutic strategies.
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