碳水化合物结合模块
柯德兰
化学
固定化酶
酶
色谱法
吸附
多糖
生物催化
组合化学
生物化学
有机化学
糖苷水解酶
催化作用
离子液体
作者
Zhen Qin,Si Lin,Yongjun Qiu,Qiming Chen,Zhifu Yin,Jingling Zhou,Liming Zhao
出处
期刊:Food Chemistry
[Elsevier]
日期:2019-11-01
卷期号:299: 125037-125037
被引量:27
标识
DOI:10.1016/j.foodchem.2019.125037
摘要
Immobilization of enzymes is an essential strategy with outstanding prospects in biocatalytic processes. Nontoxic, inexpensive immobilized enzyme approach is especially important for food enzymes. We here demonstrate that a carbohydrate-binding module family 56 domain (CBM56-Tag) mediates the immobilization of fusion enzymes with the curdlan (β-1,3-glucan) particle support, thereby enabling the one-step immobilization-purification of target enzymes. CBM56-Tag exhibits an immunoglobulin-like β-sandwich fold, which can be adsorbed by curdlan via hydrogen bond-mediated binding. The maximum adsorption capacity of a fusion chitosanase (CBM56-GsCsn46A) on curdlan is 50.72 mg/g. The immobilized enzyme could be directly used in the packed-bed reactor. This immobilization strategy utilizes a natural polysaccharide without any treatment, avoiding the negative environmental effects. Moreover, the one step immobilization-purification simplifies the purification step, which reduces the use of chemicals. Our study provides a nontoxic and inexpensive immobilization strategy for the biocatalytic reaction in food industry.
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