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Related Experiment Video

Updated: Jul 14, 2026

Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System

Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System

Published on: August 8, 2016

Label-free continuous enzyme assays with macrocycle-fluorescent dye complexes.

Andreas Hennig¹, Hüseyin Bakirci, Werner M Nau

¹School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany.

|July 3, 2007

Summary

A novel assay uses macrocycles and fluorescent dyes to detect amino acid decarboxylase activity. This economic and convenient method offers a new way to monitor enzyme function through fluorescence changes.

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Area of Science:

Biochemistry
Analytical Chemistry
Enzyme Assays

Background:

Traditional enzyme activity assays often rely on antibodies, radioactive markers, or labeled substrates.
There is a need for convenient, economical, and general assay methods for enzyme activity monitoring.

Purpose of the Study:

To introduce a new, economic, convenient, and general assay principle for monitoring enzyme activity.
To demonstrate the application of this principle for the continuous monitoring of amino acid decarboxylase activity.

Main Methods:

Utilizing the reversible interaction between water-soluble macrocycles (cucurbiturils or calixarenes) and fluorescent dyes.
Monitoring changes in fluorescence intensity resulting from the competition between enzymatic products and dyes for macrocycle complexation.

Main Results:

Successfully demonstrated continuous monitoring of amino acid decarboxylase activity.
Showcased fluorescence changes directly correlating with enzyme activity due to competitive binding with macrocycles.

Conclusions:

The developed assay principle is economic, convenient, and broadly applicable.
This method provides a valuable complementary alternative to existing techniques for enzyme activity determination.