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Updated: Oct 14, 2025
Parallel Interrogation of β-Arrestin2 Recruitment for Ligand Screening on a GPCR-Wide Scale using PRESTO-Tango Assay
Published on: March 10, 2020
Assays for detecting arrestin interaction with GPCRs
Nicole A Perry-Hauser1, Wesley B Asher2, Maria Hauge Pedersen3
1Department of Psychiatry, Columbia University, Vagelos College of Physicians and Surgeons, New York, NY, United States; Division of Molecular Therapeutics, New York Psychiatric Institute, New York, NY, United States.
Abstract:
The four vertebrate arrestins play a key role in the desensitization and internalization of G protein-coupled receptors (GPCRs) and also mediate receptor-dependent signaling. Recent work has shown that bias for arrestin vs G protein signaling could offer certain therapeutic advantages (or disadvantages) in different systems, making assays that measure arrestin binding to receptors important for drug discovery efforts. Herein, we briefly review several commonly used techniques for measuring arrestin binding to receptors, as well as provide an in-depth and methodologically focused review of two methods that do not require receptor modification. The first approach measures direct binding between purified arrestin and rhodopsin, and the second measures the recruitment of arrestin to receptors in living cells.
Insights
Arrestin proteins are crucial for G protein-coupled receptor (GPCR) regulation and signaling. Assays measuring arrestin binding to GPCRs are vital for drug discovery, with new methods offering receptor-independent analysis.
Area of Science:
- Biochemistry
- Molecular Pharmacology
- Cell Biology
Background:
- Vertebrate arrestins regulate G protein-coupled receptor (GPCR) desensitization, internalization, and signaling.
- Biased arrestin versus G protein signaling holds therapeutic potential, necessitating robust assays for drug discovery.
Purpose of the Study:
- To review techniques for measuring arrestin binding to GPCRs.
- To provide an in-depth methodological review of two receptor-modification-free assays for arrestin-GPCR interactions.
Main Methods:
- Review of established arrestin-GPCR binding assays.
- Detailed examination of two novel methods: direct binding assay (purified arrestin and rhodopsin) and a living-cell recruitment assay.
Main Results:
- Established methods for measuring arrestin binding to GPCRs were summarized.
- Two receptor-modification-free methods were detailed, focusing on direct binding and cellular recruitment.
Conclusions:
- Accurate measurement of arrestin-GPCR interactions is critical for drug discovery.
- The presented receptor-modification-free methods offer valuable tools for studying arrestin bias and GPCR signaling pathways.
