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A Fibrinolytic Enzyme from Bacillus amyloliquefaciens D4-7 Isolated from Chungkook-Jang; It′s Characterization and Influence of Additives on Thermostability.  

김상숙 (이지바이오시스템 생물자원연구소)
이주훈 (이지바이오시스템 생물자원연구소)
안용선 (이지바이오시스템 생물자원연구소)
김정환 (서울보건대학 조리예술과)
강대경 (서울보건대학 조리예술과)
Publication Information
Microbiology and Biotechnology Letters / v.31, no.3, 2003 , pp. 271-276 More about this Journal
Abstract
Bacillus amyloliquefaciens D4, which produces a strongly fibrinolytic enzyme, was isolated from Chungkook-Jang, a traditional Korean soybean-fermented food. B. amyloliquefaciens D4 was mutated with N-methyl-N-nitro-N-nitrosoguanidine (MNNG) to yield a series of mutants with increasing levels of fibrinolytic enzyme production. After mutation, a mutant D4-7 was obtained with fibrinolytic activity about eight times stronger than the parent strain. The fibrinolytic activity of B. amyloliquefaciens D4-7, reached a maximum, when the producer was cultivated in 2% Isolated Soy Protein (ISP) broth for 48 h at $37^{\circ}C$. Compared to commercial fibrinolytic enzymes, the cell-free culture supernatant of B. amyloliquefaciens D4-7 showed stronger activity than plasmin and streptokinase. The optimum temperature and pH were $50^{\circ}C$ and 10.0 and thermostability was increased by the addition of glycerol, glucose, and NaCl.
Keywords
Bacillus amyloliquefaciens; Chungkook-Jang; fibrinolytic enzyme; thermostability;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
Times Cited By SCOPUS : 6
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