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Mapping the Binding Site of an Aptamer on ATP Using MicroScale Thermophoresis

Mapping the Binding Site of an Aptamer on ATP Using MicroScale Thermophoresis

Published on: January 7, 2017

Decoding aptamer-protein binding kinetics for continuous biosensing using single-molecule techniques.

Mike Filius¹, Lena Fasching², Raman van Wee¹

¹Department of BioNanoScience, Kavli Institute of Nanoscience, Delft University of Technology, 2629 HZ Delft, Netherlands.

Science Advances

|February 14, 2025

Summary

This summary is machine-generated.

This study introduces a single-molecule technique to understand aptamer-protein binding, crucial for developing advanced biosensors for health monitoring.

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Area of Science:

Biomolecular Engineering
Biosensor Technology
Biophysics

Background:

Continuous biosensing offers real-time biochemical process monitoring for health applications.
Aptamers are increasingly used as biorecognition elements in biosensors, but their binding interactions are not fully understood.
Understanding aptamer-target binding kinetics is essential for optimizing biosensor performance.

Purpose of the Study:

To present a novel single-molecule technique for decoding aptamer-protein binding interactions.
To elucidate the binding kinetics of structurally similar aptamers.
To enable the rational design of high-performance aptamer-based biosensors.

Main Methods:

Development and application of a single-molecule assay to analyze aptamer-protein binding.
Utilizing computational simulations to guide the interpretation of binding data.
Validation of the technique using quartz crystal microbalance experiments.

Main Results:

The single-molecule assay successfully decoded binding kinetics of aptamers with similar affinities.
Quantitative insights into binding interactions enabled rational understanding of biosensor sensitivity and limit of detection.
Demonstrated capability using thrombin and structurally similar aptamers (HD1, RE31, NU172).

Conclusions:

The developed single-molecule technique provides high temporal resolution for studying aptamer-protein interactions.
This approach facilitates a deeper understanding of biosensor mechanisms.
Paves the way for rational design and optimization of aptamer-based biosensors.