Construction of Photo- and Thermo-Responsive Polymer-MOF@Enzyme Composites for Enhancing Its Biocatalytic Performance
Muhammad Ali Tajwar, Nasir Ali, Xiangru Zhang, Rubina Jabeen, Yutong Liu, Dihua Shangguan, Li Qi
Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (6) : 1290-1297.
Construction of Photo- and Thermo-Responsive Polymer-MOF@Enzyme Composites for Enhancing Its Biocatalytic Performance
Recently, metal-organic framework (MOF)@enzyme composites have attracted increasing research interest. However, the fabrication of polymers-modified MOF@enzyme composites with high bio-catalytic performance remains challenging. Herein, a stimulus-responsive polymer, poly(acrylate-3′,3′-dimethyl-6-nitro-spiro-2H-1-benzopyran-2,2′ indoline-1′-ester-co-N-isopropyl acrylamide) (PSPN), was in-situ polymerized in UiO-66-NH2 (UN). The dual-responsive PSPN-UN@L-ASNase composites were constructed following L-asparaginase (L-ASNase) covalently attached to the UN surface. Interestingly, under 365 nm UV irradiation at 45 °C, the PSP moiety in PSPN underwent a trans-to-cis conformational change and the PN moiety in PSPN transferred from a stretched- to a coiled-state, generating a confinement effect that significantly enhanced the bio-catalytic performance of the composites. Compared with free L-ASNase, the composites showed a 42.0-folds increase in maximum catalytic reaction velocity. Furthermore, the PSPN-UN@L-ASNase composites demonstrated high toxicity for Jurkat leukaemia cells. The stimulus-responsive polymer-MOF@enzyme composites provide a novel avenue for controlled bio-catalysis with great potential for targeted leukaemia therapy.
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