Arrestin Biosensor Resonance Energy Transfer for GPCR Screening
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Solution Overview
Problem
Current methods for monitoring receptor activation, particularly for G protein-coupled receptors (GPCRs), are limited by the need for modified receptors, lack of sensitivity, and inability to provide quantitative results suitable for large-scale screening analyses.
Innovation Solution
A resonance energy transfer (RET) biosensor is developed using an arrestin tagged with both a fluorophore and a bioluminophore, allowing for the measurement of receptor activation without modifying the receptors, with high sensitivity and adaptability for large-scale screening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current methods for monitoring receptor activation are used, then receptor activation can be monitored, but the methods require modified receptors and lack sensitivity for large-scale screening
Solution Approach 1:
The patent introduces arrestin as an intermediary biosensor molecule that binds to activated GPCRs and undergoes conformational changes. This intermediary approach allows detection of receptor activation without modifying the receptors themselves, as the arrestin biosensor acts as a mediator between the receptor and the detection system.
Solution Approach 2:
The patent utilizes conformational changes in arrestin as a detectable parameter change. When arrestin binds to activated GPCRs, it undergoes specific conformational transitions that can be monitored using resonance energy transfer between fluorophore and bioluminophore tags, providing sensitive detection without receptor modification.
2Productivity
If conventional biosensor methods are used, then some monitoring capability is achieved, but quantitative results suitable for large-scale screening are not obtained
Solution Approach 1:
The patent replaces conventional mechanical or chemical detection methods with resonance energy transfer (RET) detection. The RET signal provides robust, quantitative measurements that are well-suited for automated, high-throughput screening platforms, enabling both large-scale productivity and quantitative accuracy.
Solution Approach 2:
The arrestin biosensor system is designed to be universally applicable to multiple GPCR types and signaling pathways. The same biosensor platform can monitor various receptor activations, making it ideal for large-scale screening campaigns across different target classes while maintaining quantitative rigor.
3Loss of information
If real-time monitoring of conformational changes is implemented, then detailed activation dynamics are captured, but assay complexity increases
Solution Approach 1:
The patent segments the detection function into modular components: arrestin biosensor with N-terminal fluorophore tag and C-terminal bioluminophore tag. This segmentation allows the conformational change detection to be implemented as a standardized module that can be incorporated into existing screening assays without overwhelming complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The biosensor enables real-time monitoring of receptor activation and conformational changes, providing quantitative results and facilitating high-throughput screening analyses with robust assay performance.
Implementation Method 1
a resonance energy transfer (RET) biosensor comprising an arrestin tagged with both a fluorophore and a bioluminophore
Data Source
AI summary
The present invention relates to a novel biosensor. A resonance energy transfer (RET) biosensor comprising a beta(β)-arrestin tagged with a first and a second chromophore, wherein said first chromophore is a fluorophore and said second chromophore is a fluorophore or a bioluminophore is described.