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Secretory expression of a heterologous nattokinase in Lactococcus lactis
被引:66
|作者:
Liang, Xiaobo
Zhang, Lixin
Zhong, Jin
[1
]
Huan, Liandong
机构:
[1] Chinese Acad Sci, Inst Microbiol, Ctr Metab Engn Microorganisms, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Inst Microbiol, State Key Lab Microbial Resource, Beijing 100080, Peoples R China
[3] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
[4] Chinese Acad Sci, Sea Inst Oceanol, Guangzhou 510301, Peoples R China
关键词:
D O I:
10.1007/s00253-006-0809-4
中图分类号:
Q81 [生物工程学(生物技术)];
Q93 [微生物学];
学科分类号:
071005 ;
0836 ;
090102 ;
100705 ;
摘要:
Nattokinase has been reported as an oral health product for the prevention of atherosclerosis. We developed a novel strategy to express a nattokinase from Bacillus subtilis in a live delivery vehicle, Lactococcus lactis. Promoter P (nisZ) and signal peptide SPUsp were used for inducible and secretory expression of nattokinase in L. lactis. Western blotting analysis demonstrated that nattokinase was successfully expressed, and about 94% of the enzyme was secreted to the culture. The recombinant nattokinase showed potent fibrinolytic activity, equivalent to 41.7 urokinase units per milliliter culture. Expression and delivery of such a fibrinolytic enzyme in the food-grade vehicle L. lactis would facilitate the widespread application of nattokinase in the control and prevention of thrombosis diseases.
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页码:95 / 101
页数:7
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