# Monitoring Receptor Clustering by Aggregation‐Induced Emission

## TL;DR

The paper describes a system that uses fluorescent receptors in cell membranes to detect and monitor receptor clustering triggered by specific molecules.

## Contribution

The novel contribution is the development of a fluorescence-based system using aggregation-induced emission to monitor receptor clustering in lipid bilayers.

## Key findings

- Receptors with bisphosphonate head groups and AIEE properties show fluorescence upon dimerization triggered by polyammonium messengers.
- The study reveals how receptor design, lipid environment, and messenger properties influence signal transduction efficiency and kinetics.
- The work provides insights into how receptor aggregation and membrane organization affect fluorescence-based signaling.

## Abstract

This study introduces a simple signal transduction system that mimics the receptor tyrosine kinase mechanism by employing amphiphilic receptors embedded in lipid bilayers. The designed receptors carry bisphosphonate head groups and feature aggregation‐induced emission enhancement (AIEE) properties. Upon addition of polyammonium messengers, they undergo ligand‐induced dimerization or clustering inside the membrane. Steric restriction of intramolecular motion in the AIE luminophores sends out a fluorescence signal. Systematic comparative studies highlight the impact of receptor design, lipid environment and messenger properties on the efficiency, kinetics, and strength of signal transduction. These findings provide new insight into the interplay between receptor aggregation and membrane organization in controlling fluorescence‐based signaling systems. Practical perspectives and inherent limitations are critically discussed.

Receptor clustering induced by molecular recognition: AIE‐functionalized bisphosphonate receptors are embedded in a lipid bilayer. Upon addition of a cationic messenger, they undergo dimerization and send out a fluorescence signal.© 2025 WILEY‐VCH GmbH