A facile one-pot method to prepare peroxidase-like nanogel artificial enzymes for highly efficient and controllable catalysis

Publication date: 1 February 2019Source: Colloids and Surfaces B: Biointerfaces, Volume 174Author(s): Hejin Shi, Yong Liu, Rui Qu, Yuanfeng Li, Rujiang Ma, Yingli An, Linqi ShiAbstractNovel artificial enzymes are highly desired to overcome the shortcomings of natural enzymes during industrial or biological applications. Here we designed and prepared nanogel-based artificial enzymes (NAEs) to mimic natural horseradish peroxidase (HRP) using a facile one-pot, scalable method. The poly(N-isopropylacrylamide) (PNIPAM) matrix provided a temperature-responsive and size-controllable scaffold for the NAEs, and 1-vinylimidazole (Vim) moieties stabilized the enzymatic centers (Hemin) through coordination interaction. The feeding ratios of the components to prepare NAEs were subsequently studied and optimized to ensure the NAEs possess the highest catalytic activity and stability. The optimized NAEs were quite stable and can maintain their catalytic activities over a broad range of heat or pH treatments, and a long storage period as well. The NAEs are active to catalytic oxidation of several azo compounds and their activities can easily be switched on/off by changing the surrounding temperature. Taken together, these easily made, highly stable, efficient and activity-switchable NAEs could mimic natural HRP while overcoming their shortcomings and have a potential in wastewater treatment and controllable catalysis.Graphical abstract
Source: Colloids and Surfaces B: Biointerfaces - Category: Biochemistry Source Type: research