Examining lysozyme structures on polyzwitterionic brush surfaces
1Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, 1 Castle Point on Hudson, Hoboken, NJ, 07030, USA.
Colloids and Surfaces. B, Biointerfaces
|September 23, 2017
Summary
Short polyzwitterionic brushes enhance lysozyme stability at higher temperatures by controlling hydration layers. This finding is crucial for developing robust biosensors for demanding environments.
Area of Science:
- Biomaterials Science
- Protein Chemistry
- Polymer Science
Background:
- Protein adsorption on biomaterials is critical for biosensor functionality.
- Understanding protein-polymer interactions is key to controlling protein stability.
- Hydrophilic polymers like poly[2-(methacryloyloxy)ethyl dimethyl-(3-sulfopropyl)ammonium hydroxide] (PMEDSAH) are used in biosensor applications.
Purpose of the Study:
- To investigate the conformational structures of lysozyme adsorbed on PMEDSAH brushes.
- To elucidate the role of protein-polymer interactions and hydration layers on lysozyme stability.
- To determine how brush thickness and temperature affect lysozyme structure and stability.
Main Methods:
- Analysis of lysozyme conformational structures at PMEDSAH brush interfaces.
- Controlled variation of PMEDSAH brush thickness (5-15nm) and temperature (room temperature to 75°C).
- Measurement of lysozyme structural stability under different conditions.
Main Results:
- Lysozyme exhibited reduced structural stability on 15nm PMEDSAH brushes at 75°C compared to room temperature.
- Shorter PMEDSAH brushes (5-8nm) showed increased lysozyme structural stability when heated.
- Heating caused shorter brushes to stretch in a hydrated state, enhancing protein stability.
Conclusions:
- Brush thickness and temperature significantly influence protein stability through hydration layer modulation.
- Short polyzwitterionic brushes can enhance biomaterial interactions and protein stability at elevated temperatures.
- These findings support the development of more robust biosensors for high-temperature applications.
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