Alkaline Modification of a Metal–Enzyme–Surfactant Nanocomposite to Enhance the Production of L-α-glycerylphosphorylcholine
AbstractMicroenvironment modification within nanoconfinement can maximize the catalytic activity of enzymes. Phospholipase A1 (PLA1) has been used as the biocatalyst to produce high value L-α-glycerylphosphorylcholine (L-α-GPC) through hydrolysis of phosphatidylcholine (PC). We successfully developed a simple co-precipitation method to encapsulate PLA1 in a metal–surfactant nanocomposite (MSNC), then modified it using alkalescent 2-Methylimidazole (2-Melm) to promote catalytic efficiency in biphasic systems. The generated [email protected]1/MSNC showed higher catalytic activity than PLA1/MSNC and free PLA1. Scanning electron microscopy and transmission electron microscopy showed a typical spherical structure of [email protected]1/MSNC at about 50 nm, which was smaller than that of [email protected] Energy disperse spectroscopy, N2 adsorption isotherms, Fourier transform infrared spectrum, and high-resolution X-ray photoelectron spectroscopy proved that 2-Melm successfully modified PLA1/MSNC. The generated [email protected]1/MSNC showed a high catalytic rate per unit enzyme mass of 1.58 μmol mg-1 min-1 for the formation of L-α-GPC. The [email protected]1/MSNC also showed high thermal stability, pH stability, and reusability in a water–hexane biphasic system. The integration of alkaline and amphiphilic properties of a nanocomposite encapsulating PLA1 resulted in highly efficient sequenced reactions of acyl migration and enzymatic hydrolysis at the interface of a biphasic system, which cannot be achieved by free enzyme. View Full-Text
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Li, H.; Cao, X.; Lu, Y.; Ni, Y.; Wang, X.; Lu, Q.; Li, G.; Chen, K.; Ouyang, P.; Tan, W. Alkaline Modification of a Metal–Enzyme–Surfactant Nanocomposite to Enhance the Production of L-α-glycerylphosphorylcholine. Catalysts 2019, 9, 237.
Li H, Cao X, Lu Y, Ni Y, Wang X, Lu Q, Li G, Chen K, Ouyang P, Tan W. Alkaline Modification of a Metal–Enzyme–Surfactant Nanocomposite to Enhance the Production of L-α-glycerylphosphorylcholine. Catalysts. 2019; 9(3):237.Chicago/Turabian Style
Li, Hui; Cao, Xun; Lu, Yuanyuan; Ni, Yan; Wang, Xin; Lu, Qiuhao; Li, Ganlu; Chen, Kequan; Ouyang, Pingkai; Tan, Weimin. 2019. "Alkaline Modification of a Metal–Enzyme–Surfactant Nanocomposite to Enhance the Production of L-α-glycerylphosphorylcholine." Catalysts 9, no. 3: 237.
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