Chinese Journal of Catalysis ›› 2024, Vol. 63: 213-223.DOI: 10.1016/S1872-2067(24)60088-4

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Conjugated microporous polymers-scaffolded enzyme cascade systems with enhanced catalytic activity

Zhenhua Wua, Jiafu Shia,c,d,*(), Boyu Zhanga, Yushuai Jiaob, Xiangxuan Menge, Ziyi Chua, Yu Chena, Yiran Chenga, Zhongyi Jiangb,c,f,*()   

  1. aSchool of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
    bKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    cHaihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
    dState Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    eCollege of Chemical Engineering, Fuzhou University, Fuzhou 350108, Fujian, China
    fJoint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, Fujian, China
  • Received:2024-04-27 Accepted:2024-06-21 Online:2024-08-18 Published:2024-08-19
  • Contact: *E-mail: shijiafu@tju.edu.cn (J. Shi), zhyjiang@tju.edu.cn (Z. Jiang).
  • Supported by:
    National Key Research and Development Program of China(2021YFC2102300);National Key Research and Development Program of China(2022YFC2105900);National Natural Science Funds of China(22122809);Open Funding Project of the State Key Laboratory of Biochemical Engineering, China(2020KF-06);Haihe Laboratory of Sustainable Chemical Transformations.

Abstract:

Enhancing catalytic activity of multi-enzyme in vitro through substrate channeling effect is promising yet challenging. Herein, conjugated microporous polymers (CMPs)-scaffolded integrated enzyme cascade systems (I-ECSs) are constructed through co-entrapping glucose oxidase (GOx) and horseradish peroxidase (HRP), in which hydrogen peroxide (H2O2) is the intermediate product. The interplay of low-resistance mass transfer pathway and appropriate pore wall-H2O2 interactions facilitates the directed transfer of H2O2, resulting in 2.4-fold and 5.0-fold elevation in catalytic activity compared to free ECSs and separated ECSs, respectively. The substrate channeling effect could be regulated by altering the mass ratio of GOx to HRP. Besides, I-ECSs demonstrate excellent stabilities in harsh environments and multiple recycling.

Key words: Biocatalysis, Immobilization, Enzyme cascade system, Substrate channeling effect, Conjugated microporous polymers