Green synthesis of stable hybrid biocatalyst using a hydrogen-bonded, π-π-stacking supramolecular assembly for electrochemical immunosensor

Wei Huang, Haitao Yuan, Huangsheng Yang, Xiaomin Ma, Shuyao Huang, Hongjie Zhang, Siming Huang, Guosheng Chen () and Gangfeng Ouyang ()
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Wei Huang: Sun Yat-sen University
Haitao Yuan: Shenzhen People’s Hospital (The Second Clinical Medical College, Jinan University)
Huangsheng Yang: Sun Yat-sen University
Xiaomin Ma: Southern University of Science and Technology
Shuyao Huang: Sun Yat-sen University
Hongjie Zhang: Sun Yat-sen University
Siming Huang: Guangzhou Medical University
Guosheng Chen: Sun Yat-sen University
Gangfeng Ouyang: Sun Yat-sen University

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Rational integration of native enzymes and nanoscaffold is an efficient means to access robust biocatalyst, yet remains on-going challenges due to the trade-off between fragile enzymes and harsh assembling conditions. Here, we report a supramolecular strategy enabling the in situ fusion of fragile enzymes into a robust porous crystal. A c2-symmetric pyrene tecton with four formic acid arms is utilized as the building block to engineer this hybrid biocatalyst. The decorated formic acid arms afford the pyrene tectons high dispersibility in minute amount of organic solvent, and permit the hydrogen-bonded linkage of discrete pyrene tectons to an extended supramolecular network around an enzyme in almost organic solvent-free aqueous solution. This hybrid biocatalyst is covered by long-range ordered pore channels, which can serve as the gating to sieve the catalytic substrate and thus enhance the biocatalytic selectivity. Given the structural integration, a supramolecular biocatalyst-based electrochemical immunosensor is developed, enabling the pg/mL detection of cancer biomarker.

Date: 2023
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DOI: 10.1038/s41467-023-39364-x

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