DNA-directed coimmobilization of multiple enzymes on organic-inorganic hybrid DNA flowers
文献类型： 外文期刊
作者： Li, Yali 1 ; Wang, Jing 2 ; Huang, Fenghong 1 ; Zhang, Yufei 2 ; Zheng, Mingming 2 ;
作者机构： 1.Shandong Acad Agr Sci, Insititute Food & Nutr Sci & Technol, Jinan, Peoples R China
2.Chinese Acad Agr Sci, Oil Crops Res Inst, Hubei Key Lab Lipid Chem & Nutr, Key Lab Oilseeds Proc,Minist Educ, Wuhan, Peoples R China
关键词： DNA-directed immobilization (DDI); rolling circle amplification (RCA); multienzyme coimmobilization; organic-inorganic hydrid DNA flowers (hDFs); colorimetric detection of glucose
期刊名称：FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY （ 影响因子：6.064； 五年影响因子：6.303 ）
ISSN： 2296-4185
年卷期： 2022 年 10 卷
页码：
收录情况： SCI
摘要： The artificial multienzyme systems developed by mimicking nature has attracted much interest. However, precisely controlled compositions and ratios of multienzymatic co-immobilization systems are still limited by the indistinguishable nature of enzymes. Herein, a strategy for fabricating DNA-directed immobilization of horseradish peroxidase (HRP) and glucose oxidase (GOx) on hybrid DNA nanoflowers (GOx-HRP@hDFs) is presented. The preparation of micron-sized hybrid DNA flowers (hDFs) begins with the predetermined repeatable polymer-like DNA sequences which contained two strands. The hDFs structure is generated through one-pot rolling circle amplification (RCA) and self-assembly with magnesium pyrophosphate inorganic crystals. Based on the rigid-base pairing, GOx and HRP conjugated with sequences complementary to strands would be anchored to the predesigned locations, respectively. By adjusting the loading amount/ratio of enzymes properly, the maximal catalytic efficiency can be precisely regulated. The reaction activity of GOx-HRP@hDFs was 7.4 times higher than that of the free GOx-HRP under the optimal mole ratio (GOx/HRP 4:1). In addition, this multienzyme catalyst system exhibits excellent precision, specificity, reproducibility, and long-term storage stability when applied to real human blood samples. The preceding results validate that GOx-HRP@hDFs are promising candidates for personal diabetes detection.
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