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Supramolecularly oriented immobilization of proteins using cucurbit[8]uril
Arántzazu González-Campo1, Melanie Brasch, Dana A Uhlenheuer
1Molecular Nanofabrication Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands.
Langmuir : the ACS Journal of Surfaces and Colloids
|November 9, 2012
Summary
This study presents a novel supramolecular strategy for precisely positioning proteins on surfaces using cucurbit[8]uril (CB[8]) as a linker. This method enables the creation of stable, reusable, and fluorescent protein patterns on various surfaces.
Area of Science:
- Supramolecular chemistry
- Surface science
- Biotechnology
Background:
- Oriented protein immobilization on surfaces is crucial for biosensors and biomaterials.
- Existing methods often lack stability, precision, or reusability.
Purpose of the Study:
- To develop a robust supramolecular strategy for oriented protein assembly on surfaces.
- To create stable, patterned protein arrays with high signal-to-noise ratio.
- To demonstrate the reversibility and reusability of the immobilized protein complexes.
Main Methods:
- Utilized a viologen-based guest molecule on the surface and a naphthol guest moiety on a yellow fluorescent protein.
- Employed cucurbit[8]uril (CB[8]) as a supramolecular linker, forming ternary complexes via charge-transfer interactions.
- Characterized assembly using fluorescence microscopy, atomic force microscopy, surface plasmon resonance, and spectroscopy.
- Developed two immobilization routes involving microcontact chemistry and controlled incubation or printing.
Main Results:
- Successfully fabricated uniform and stable fluorescent protein patterns on surfaces.
- Achieved high signal-to-noise ratios in the patterned arrays.
- Confirmed the role of CB[8] as a selective and stable linking unit.
- Demonstrated reversible attachment and reusability of the protein complexes.
Conclusions:
- The developed supramolecular strategy enables precise and oriented protein immobilization on surfaces.
- Cucurbit[8]uril-mediated assembly offers a versatile and efficient method for creating functional protein patterns.
- The reversible and reusable nature of the system holds promise for advanced biosensing and surface functionalization applications.
