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Immobilized laccase on activated poly(vinyl alcohol) microspheres for enzyme thermistor application

Applied Biochemistry and Biotechnology, ISSN: 1559-0291, Vol: 173, Issue: 5, Page: 1097-1107
2014
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Article Description

Poly(vinyl alcohol) (PVA) microspheres were prepared by inverse suspension crosslinked method, with glutaraldehyde as a crosslinking agent. PVA microspheres activated with aldehyde groups were employed for Trametes versicolor laccase immobilization. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the activated PVA microspheres and PVA microspheres with immobilized laccase (Lac/PVA microspheres), which show that laccase was successfully immobilized on the PVA microspheres. The optimum pH and temperature coupling conditions for the immobilized laccase were determined to be 3.3 and 30°C, respectively. Residual activity was also investigated by soaking the immobilized laccase in organic solvents at different concentrations, proving it chemically stable. Immobilized laccase exhibited good storage stability at 4°C. The enzyme biosensor showed good performance in 2,2-azinobis(3-ethylthiazoline-6-sulfonate) and bisphenol A, with concentration ranges of 2 to 8 mM and 0.05 to 0.25 mM, respectively. Therefore, PVA microspheres may have high potential as support for enzyme thermistor applications. © 2014 Springer Science+Business Media.

Bibliographic Details

Bai, Xue; Gu, Haixin; Chen, Wei; Shi, Hanchang; Yang, Bei; Huang, Xin; Zhang, Qi

Springer Science and Business Media LLC

Biochemistry, Genetics and Molecular Biology; Chemical Engineering; Immunology and Microbiology

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