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Enzyme-polymer conjugates as robust pickering interfacial biocatalysts for efficient biotransformations and one-pot cascade reactions

 
: Sun, Zhiyong; Glebe, Ulrich; Charan, Himanshu; Böker, Alexander; Wu, Changzhu

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Angewandte Chemie. International edition 57 (2018), Nr.42, S.13810-13814
ISSN: 1433-7851
ISSN: 0044-8249
ISSN: 0570-0833
ISSN: 1521-3773
Englisch
Zeitschriftenaufsatz
Fraunhofer IAP ()

Abstract
Despite the rapid development of Pickering interfacial catalysis (PIC) at liquid–liquid interfaces with chemocatalysts, the use of unstable biocatalysts at emulsion interfaces remains a technical challenge. Herein, we present a Pickering interfacial biocatalysis (PIB) platform based on robust and recyclable enzyme–polymer conjugates that act as both catalytic sites and stabilizers at the interface of Pickering emulsions. The conjugates were prepared by growing poly(N‐isopropylacrylamide) on a fragile enzyme, benzaldehyde lyase, under physiological conditions. The mild in situ conjugation process preserved the enzyme structure, and the conjugates were used to emulsify a water–organic two‐phase system into a stable Pickering emulsion, leading to a significantly larger interfacial area and a 270‐fold improvement in catalytic performance as compared to the unemulsified two‐phase system. The PIB system could be reused multiple times. Conjugates of other enzymes were also fabricated and applied for cascade reactions.

: http://publica.fraunhofer.de/dokumente/N-521496.html