Synthesis of the carboxymethyl cellulose magnetic nanoparticles for efficient immobilization of prenyltransferase NovQ

• Published in: Carbohydrate polymers Vol. 235; p. 115955
• Main Authors: Ni, Wenfeng, Zheng, Zhiming, Liu, Hui, Wang, Peng, Wang, Li, Wang, Han, Sun, Xiaowen, Yang, Qiang, Tang, Hengfang, Zhao, Genhai
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.05.2020
• Subjects: Carboxymethyl cellulose; Immobilization; Magnetic nanoparticles; Prenylated activity; Prenyltransferase NovQ; Carboxymethyl cellulose; Immobilization; Prenylated activity; Prenyltransferase NovQ; Magnetic nanoparticles
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2020.115955

[Display omitted] •A facile and efficient approach was used to prepare magnetic nanocomposite.•The immobilized NovQ exhibits good tolerance towards pH and temperature.•Immobilized NovQ displays improved storage stability and reusability.•The nanoparticles occupy an inessential domain away from active center of NovQ. Prenyltransferase NovQ immobilized carboxymethyl cellulose magnetic nanoparticles (NCMNs) were successfully synthesized via a valuable approach integrated from nanocomposite preparation, and applied for the production of vitamin K2 using menadione hydroquinol and dimethylallyl diphosphate (DMAPP) as substrates. To investigate the interaction between nanoparticles and NovQ, we characterized the nanocomposite, and revealed that carboxymethyl cellulose (CMC) and Fe3O4 formed a core-shell structure to absorb NovQ in the reaction systems, resulting from the high affinity of immobilized materials. Meanwhile, NCMNs with excellent pH and temperature tolerance, enhanced prenylated activity, and improved stability were found. Molecular docking analysis was also conducted to justify the contribution of multiple amino acids and effect of nanoparticles on catalytic properties of NovQ. Taken together, our study introduces a promising strategy to prepare magnetic nanoparticles and improve the performance of catalyst, which aims for opening new orientations for synthesis of magnetic nanoparticles used for prenyltransferase immobilization.