A supramolecular bioactive surface for specific binding of protein

Area of Science:

• Materials Science
• Biotechnology
• Surface Chemistry

Background:

• Bioactive surfaces are crucial for biosensors and biological detection.
• Immobilized molecules on surfaces can promote specific molecular interactions.
• Current methods require development for reusability and enhanced selectivity.

Purpose of the Study:

• To fabricate a supramolecular bioactive surface with specific protein binding capability.
• To utilize noncovalent interactions for creating a versatile and reusable biosensing platform.
• To demonstrate high binding capacity and selectivity for target proteins.

Main Methods:

• Layer-by-layer (LbL) deposition of polyelectrolyte films containing adamantane groups.
• Incorporation of β-cyclodextrin derivatives with biotin units via host-guest interactions.
• Characterization using fluorescence microscopy and quartz crystal microbalance measurements.

Main Results:

• The fabricated surface showed high binding capacity and selectivity for avidin.
• Host-guest interactions enabled reversible binding and easy release of the protein complex.
• The surface demonstrated reusability after regeneration with fresh host molecules.

Conclusions:

• The supramolecular bioactive surface offers a promising platform for developing reusable biosensors.
• This approach, based on reversible noncovalent interactions, can be applied to detect and measure specific proteins.
• The method provides a versatile strategy for creating advanced biosensing interfaces.