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Regenerative biosensor for use with biotinylated bait molecules.

Claudia Knoglinger¹, Andreas Zich¹, Lukas Traxler¹

¹Institute of Biophysics, Johannes Kepler University Linz, Gruberstrasse 40, 4020 Linz, Austria.

Biosensors & Bioelectronics

|July 24, 2017

Summary

This summary is machine-generated.

This study introduces a novel method for reversible protein immobilization on biosensor chips, enabling repeated assays without needing new chips. This advances label-free biosensing for drug discovery and diagnostics.

Keywords:

Desthiobiotin surface Regenerative biosensor Reversible immobilization Surface plasmon resonance Wild-type streptavidin

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Area of Science:

Biochemistry
Analytical Chemistry
Biotechnology

Background:

Label-free biosensors enable quantitative analysis of biomolecular interactions and diagnostics.
Current methods often require irreversible bait molecule immobilization, necessitating expensive new chips for each assay.
This limitation hinders the widespread application of label-free biosensing technologies.

Purpose of the Study:

To develop a general method for switchable immobilization of biotinylated bait molecules on biosensor chips.
To enable repeated use of biosensor chips through stable yet reversible bait molecule attachment.
To overcome the cost and time barriers associated with single-use biosensor chips.

Main Methods:

Utilized a novel desthiobiotin surface for immobilization.
Employed wild-type streptavidin as a bridge between the chip and biotinylated bait molecules.
Investigated stable immobilization and subsequent removal of bait molecules using various reagents (e.g., HCl, SDS, biotin).

Main Results:

Achieved highly stable immobilization of biotinylated bait molecules.
Demonstrated successful removal of bait molecules and chip regeneration using specific reagents.
Confirmed unlimited in situ regeneration cycles over the chip's 2-3 week lifetime.
Showcased broad applicability for academic and pharmaceutical research.

Conclusions:

The developed method provides a versatile and cost-effective solution for label-free biosensing.
Switchable immobilization significantly enhances the utility and efficiency of biosensor applications.
This regenerative chip surface offers wider applicability compared to existing technologies.