Alcalase Microarray Base on Metal Ion Modified Hollow Mesoporous Silica Spheres as a Sustainable and Efficient Catalysis Platform for Proteolysis
Alcalase Microarray Base on Metal Ion Modified Hollow Mesoporous Silica Spheres as a Sustainable and Efficient Catalysis Platform for Proteolysis
复制标题
基于金属离子修饰的中空介孔二氧化硅球的 Alcalase 微阵列作为可持续、高效的蛋白水解催化平台
DOI:
10.3389/fbioe.2020.00565
复制
发表时间:
2020-06
影响因子:
5.7
通讯作者:
Zheng Mingming
中科院分区:
文献类型:
--
作者:
Zeng Qi;Li Qi;Sun Di;Zheng Mingming
The industrial exploitation of protease is limited owing to its sensitivity to environmental factors and autolysis during biocatalytic processes. In the present study, the alcalase microarray (Bacillus licheniformis, alcalase@HMSS-NH2-Metal) based on different metal ions modified hollow mesoporous silica spheres (HMSS-NH2-Metal) was successfully developed via a facile approach. Among the alcalase@HMSS-NH2-Metal (Ca2+, Zn2+, Fe3+, Cu2+), the alcalase@HMSS-NH2-Fe3+ revealed the best immobilization efficiency and enzymatic properties. This tailor-made nanocomposite immobilized alcalase on a surface-bound network of amino-metal complex bearing protein-modifiable sites via metal-protein affinity. The coordination interaction between metal ion and alcalase advantageously changed the secondary structure of enzyme, thus significantly enhanced the bioactivities and thermostability of alcalase. The as-prepared alcalase@HMSS-NH2-Fe3+ exhibited excellent loading capacity (227.8 ± 23.7 mg/g) and proteolytic activity. Compared to free form, the amidase activity of alcalase microarray increased by 5.3-fold, the apparent kinetic constant Vmax/Km of alcalase@HMSS-NH2-Fe3+ (15.6 min−1) was 1.9-fold higher than that of free alcalase, and the biocatalysis efficiency increased by 2.1-fold for bovine serum albumin (BSA) digestion. Moreover, this particular immobilization strategy efficiently reduced the bioactivities losses of alcalase caused by enzyme leaking and autolysis during the catalytic process. The alcalase microarray still retained 70.7 ± 3.7% of the initial activity after 10 cycles of successive reuse. Overall, this study established a promising strategy to overcome disadvantages posed by free alcalase, which provided new expectations for the application of alcalase in sustainable and efficient proteolysis.
登录
查看更多内容
影响因子:
4.2
作者:
Hu Tenggen;Cheng Jianhua;Zhang Bobo;Lou Wenyong;Zong Minhua
通讯作者:
Zong Minhua
影响因子:
2.7
作者:
Jin, Xin;Li, Ju-Fang;Chen, Hong
通讯作者:
Chen, Hong
影响因子:
15
作者:
Zhang Ming;Ettelaie Rammile;Yan Tao;Zhang Suojiang;Cheng Fangqin;Binks Bernard P;Yang Hengquan
通讯作者:
Yang Hengquan
影响因子:
2.7
作者:
Ozturk, Nurcin Celik;Kazan, Dilek;Erarslan, Altan
通讯作者:
Erarslan, Altan
影响因子:
3.7
作者:
Zhang Haiyang;Fei Xu;Tian Jing;Li Yao;Zhi Hui;Wang Kang;Xu Longquan;Wang Yi
通讯作者:
Wang Yi