SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 56 ›› Issue (4): 119-125.DOI: 10.1016/j.cjche.2022.07.017

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Facile purification and immobilization of organophosphorus hydrolase on protein-inorganic hybrid phosphate nanosheets

Zhenfu Wang, Jie Gao, Qinghong Shi, Xiaoyan Dong, Yan Sun   

  1. Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin 300350, China
  • Received:2021-12-14 Revised:2022-07-17 Online:2023-06-13 Published:2023-04-28
  • Contact: Xiaoyan Dong,E-mail:d_xy@tju.edu.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (2021YFC2102801) and the National Natural Science Foundation of China (21621004).

Facile purification and immobilization of organophosphorus hydrolase on protein-inorganic hybrid phosphate nanosheets

Zhenfu Wang, Jie Gao, Qinghong Shi, Xiaoyan Dong, Yan Sun   

  1. Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin 300350, China
  • 通讯作者: Xiaoyan Dong,E-mail:d_xy@tju.edu.cn
  • 基金资助:
    This work was supported by the National Key Research and Development Program of China (2021YFC2102801) and the National Natural Science Foundation of China (21621004).

Abstract: Oriented immobilization of enzymes helps to maintain their native structure and proper orientation for high-performance engineering to meet extensive biocatalysis demands. However, the supporting materials used for orientated immobilization are usually costly or complicated in preparation, affecting their practical applications. In this work, a facile purification and immobilization method was proposed for enzyme immobilization based on organic–inorganic hybrid calcium phosphate nanocrystal (CaPs) induced by Cu2+ modified bovine serum albumin (BSA-Cu). Then, the as-prepared hybrid calcium phosphate nanosheet, BSA-Cu@CaPs, was utilized for one-pot purification and immobilization of His-tagged organophosphorus hydrolase (OPH) by metal-affinity binding to the incorporated BSA. BSA-Cu@CaPs-OPH exhibited enhanced pH stability and thermal stability compared to the free enzyme. Moreover, BSA-Cu@CaPs-OPH could retain more than 75% and 56% of initial activity after reuse 5 and 10 times, respectively. The results demonstrated that this facile strategy was promising for the effective biodegradation of organophosphorus pesticides with the immobilized enzyme.

Key words: Calcium phosphate nanocrystal (CaPs), Biomimetic mineralization, Organophosphorus hydrolase (OPH), Oriented immobilization, Hydrolysis, Methyl parathion

摘要: Oriented immobilization of enzymes helps to maintain their native structure and proper orientation for high-performance engineering to meet extensive biocatalysis demands. However, the supporting materials used for orientated immobilization are usually costly or complicated in preparation, affecting their practical applications. In this work, a facile purification and immobilization method was proposed for enzyme immobilization based on organic–inorganic hybrid calcium phosphate nanocrystal (CaPs) induced by Cu2+ modified bovine serum albumin (BSA-Cu). Then, the as-prepared hybrid calcium phosphate nanosheet, BSA-Cu@CaPs, was utilized for one-pot purification and immobilization of His-tagged organophosphorus hydrolase (OPH) by metal-affinity binding to the incorporated BSA. BSA-Cu@CaPs-OPH exhibited enhanced pH stability and thermal stability compared to the free enzyme. Moreover, BSA-Cu@CaPs-OPH could retain more than 75% and 56% of initial activity after reuse 5 and 10 times, respectively. The results demonstrated that this facile strategy was promising for the effective biodegradation of organophosphorus pesticides with the immobilized enzyme.

关键词: Calcium phosphate nanocrystal (CaPs), Biomimetic mineralization, Organophosphorus hydrolase (OPH), Oriented immobilization, Hydrolysis, Methyl parathion