In this context, surface modification of CNC via polymer grafting can be used to finely tune their surficial properties and endow CNC with a variety of functionalities, such as conductivity, pH or temperature responsiveness, reactivity…In particular, surface-initiated atom transfer radical polymerization (SI-ATRP) is a powerful tool to graft various polymers with a high grafting density and controlled chain length. However, the hydrophilic surface of CNC hinders their broader applications. Due to their fascinating properties-renewable, biocompatible, non-toxic, biodegradable, excellent mechanical performances, high specific surface area, water dispersible, can be assemble in chiral nematic phases-CNC have shown promise in various fields, including oil recovery, polymer composites reinforcing, hydrogels, aerogels, supercapacitors, energy saving buildings, cosmetics, papermaking, coatings, liquid crystals, and waste water treatment. School of Chemistry and Chemical Engineering, and Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bintuan, Shihezi University, Shihezi, ChinaĮmail: Search for more papers by this author Guofu Zhou ,įunding information: ScienceK S&T Project of Science and Technology Bureau of Bishan District in Chongqing, Grant/Award Number: Bskj20200011 Chongqing Talent Plan for Innovation and Entrepreneurship Demonstration Team, Grant/Award Number: CQYC201903243 Project for Chongqing University Innovation Research Group of Chongqing Education Committee, Grant/Award Number: CXQT19008 MOE International Laboratory for Optical Information Technologie, Yunnan expert workstation, Grant/Award Number: 202005AF150028 Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Grant/Award Number: 2017B030301007 National Natural Science Foundation of China, Grant/Award Number: 51973175 Guangdong University Research Findings Commercialization Center and Education Bureau of Foshan Innovation Research Program, Grant/Award Number: 2020JNHB09 Science and Technology Program of Guangzhou, Grant/Award Number: 2019050001 Grand of 2019 Guangdong Recruitment Program of Foreign Experts, Grant/Award Number: 191900014 Natural Science Foundation of Guangdong Province, Grant/Award Number: 1914050005542Ĭellulose nanocrystals (CNC) are rod-like nanoparticles extracted from cellulose. of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, and “the Belt and Road” International Joint Research Laboratory of Sustainable Materials, Southwest University, Chongqing, China.Zhen Zhang, SCNU-TUE Joint Lab of Device Integrated Responsive Materials (DIRM), National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China.Įmail: Sèbe, University of Bordeaux, CNRS, Bordeaux INP, Laboratoire de Chimie des Polymères Organiques, UMR 5629, F-33600 Pessac, France.Įmail: Huang, School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, and “the Belt and Road” International Joint Research Laboratory of Sustainable Materials, Southwest University, Chongqing 400715, China.Įmail: Search for more papers by this author Gilles Sèbe , Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China This strategy could be applied for photocontrolling activity of other enzymes where an α-helix is an important structural component.SCNU-TUE Joint Lab of Device Integrated Responsive Materials (DIRM), National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou, China ![]() Furthermore, the structural change in the α-helix of the lipase was confirmed by circular dichroism. The variant C127C138 attached with a cross-linker showed a threefold fully reversible activity change after illumination with UV and blue light. To screen for the optimum sites of cross-linking, several cysteine-replaced lipase variants were constructed. A bifunctional azobenzene derivative, whose trans/ cis-form photoisomerization processes could be used to control the folded and unfolded conformations of the α-helix structure, was cross-linked with two cysteine residues on the lid domain to achieve photocontrol of lipase activity. Herein, a method for the reversible photocontrol of lipase activity was developed by utilizing the conformational change of the lid structure. Photocontrol of enzymatic activity has become a helpful strategy to control biological processes.
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