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An Amylase-Responsive Bolaform Supra-Amphiphile
Yuetong Kang1, Zhengguo Cai1, Xiaoyan Tang1
1Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China.
ACS Applied Materials & Interfaces
|January 30, 2016
Summary
A new supra-amphiphile using host-guest chemistry shows fluorescence that changes with amylase activity. This provides a simple method for detecting alpha-amylase enzyme activity.
Area of Science:
- Supramolecular Chemistry
- Host-Guest Chemistry
- Fluorescent Sensors
Background:
- Bolaform covalent amphiphiles self-assemble into aggregates with aggregation-induced quenching (ACQ) of fluorescence.
- Host-guest complexation offers a strategy to control self-assembly and optical properties.
Purpose of the Study:
- To construct an amylase-responsive bolaform supra-amphiphile.
- To develop a fluorescence-based method for quantifying alpha-amylase activity.
Main Methods:
- Complexation of beta-cyclodextrin (host) with a bolaform covalent amphiphile (guest) via host-guest interactions.
- Investigation of self-assembly behavior and fluorescence properties in solution.
- Enzymatic degradation of beta-cyclodextrin by alpha-amylase to trigger fluorescence quenching.
Main Results:
- Formation of a bolaform supra-amphiphile that prevents aggregation and restores fluorescence.
- Significant and gradual fluorescence quenching upon alpha-amylase addition due to beta-cyclodextrin degradation.
- Linear correlation between alpha-amylase concentration and the rate of fluorescence quenching.
Conclusions:
- The study successfully demonstrates a novel supra-amphiphile system based on noncovalent interactions.
- The developed system offers a facile and sensitive approach for estimating alpha-amylase activity.
- This work expands the scope of supra-amphiphiles and their applications in biochemical sensing.
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