Directional immobilization of D-allulose 3-epimerase using SpyTag/SpyCatcher strategy as a robust biocatalyst for synthesizing D-allulose

被引:22
作者
Gao, Xin [1 ]
Wei, Cancan [1 ]
Qi, Hongbin [1 ]
Li, Chao [1 ]
Lu, Fuping [1 ]
Qin, Hui-Min [1 ]
机构
[1] Tianjin Univ Sci & Technol, Coll Biotechnol, Tianjin Key Lab Ind Microbiol, Key Lab Ind Fermentat Microbiol,Minist Educ,Natl E, Tianjin 300457, Peoples R China
基金
中国国家自然科学基金;
关键词
D-Allulose; 3-epimerase; Directional immobilization enzyme; SpyCatcher; SpyTag; Mixed fruit Jiaosu; D-PSICOSE; 3-EPIMERASE; RARE SUGAR; SPYCATCHER; STABILITY; BENTONITE; SUPPORT;
D O I
10.1016/j.foodchem.2022.134199
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
D-Allulose, as low-calorie rare sugar, possessed several notable biological activities and was biosynthesized by D-allulose 3-epimerase (DAEase). Here, CcDAE from Clostridium cellulolyticum was successfully immobilization via covalent attachment (RI-CcDAE), and Resin-SpyCatcher/SpyTag-CcDAE modular (DI-CcDAE). Both immobilized CcDAEs exhibited higher thermal and pH stabilities than the free form, and they maintained 80.0 % of relative activity after 7 consecutive cycles and 25 days of storage. Predominantly, DI-CcDAE represented superior cat-alytic efficiency with a 2.4-fold increase of k(cat)/K-m, compared with RI-CcDAE (0.75 s(-1) mM(-1) vs 0.31 s(-1) mM(-1)). The RI-CcDAE and DI-CcDAE were then applied in mixed fruit Jiaosu to convert D-fructose into D-allulose, which exhibited the productivity of D-allulose 1.08 g/Lh(-1) and 1.57 g/Lh(-1), respectively. This research provided a promising directional immobilization strategy for DAEase, and robust biocatalyst for production of functional foodstuff containing D-allulose.
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页数:8
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