Preparation and Characterization of β-glucosidase Films for Stabilization and Handling in Dry Configurations

Author(s): Liguang Zhang, Yanan Shen, Wenjing Lu, Lengqiu Guo, Min Xiang, Dayong Zhang*

Journal Name: Current Pharmaceutical Biotechnology

Volume 21 , Issue 8 , 2020

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Graphical Abstract:


Background: Although the stability of proteins is of significance to maintain protein function for therapeutical applications, this remains a challenge. Herein, a general method of preserving protein stability and function was developed using gelatin films.

Methods: Enzymes immobilized onto films composed of gelatin and Ethylene Glycol (EG) were developed to study their ability to stabilize proteins. As a model functional protein, β-glucosidase was selected. The tensile properties, microstructure, and crystallization behavior of the gelatin films were assessed.

Results: Our results indicated that film configurations can preserve the activity of β-glucosidase under rigorous conditions (75% relative humidity and 37°C for 47 days). In both control films and films containing 1.8 % β-glucosidase, tensile strength increased with increased EG content, whilst the elongation at break increased initially, then decreased over time. The presence of β-glucosidase had a negligible influence on tensile strength and elongation at break. Scanning electron-microscopy (SEM) revealed that with increasing EG content or decreasing enzyme concentrations, a denser microstructure was observed.

Conclusion: In conclusion, the dry film is a promising candidate to maintain protein stabilization and handling. The configuration is convenient and cheap, and thus applicable to protein storage and transportation processes in the future.

Keywords: Dry film, ethylene glycol, gelatin film, β-glucosidase, protein stabilization, SEM.

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Article Details

Year: 2020
Page: [741 - 747]
Pages: 7
DOI: 10.2174/1389201020666191202145351
Price: $65

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