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Screening of a Novel Fibrinolytic Enzyme-Producing Streptomyces from a Hyper-Arid Area and Optimization of Its Fibrinolytic Enzyme Production

文献类型： 外文期刊

作者： He, Zixuan 1 ; Sun, Yang 3 ; Chu, Min 1 ; Zhu, Jing 1 ; Zhang, Yu 4 ; Tang, Qiyong 1 ; Osman, Ghenijan 1 ; Jiang, Ling 3 ; Zhang, Zhidong 1 ;

作者机构： 1.Xinjiang Acad Agr Sci, Inst Microbiol, Xinjiang Key Lab Special Environm Microbiol, Urumqi 830091, Peoples R China

2.Xinjiang Univ, Coll Life Sci & Technol, Urumqi 830046, Peoples R China

3.Nanjing Tech Univ, Coll Food Sci & Light Ind, Nanjing 211816, Peoples R China

4.Plant Protect Stn Xinjiang Uygur Autonomous Reg, Urumqi 830023, Peoples R China

关键词： fibrinolytic enzyme; Streptomyces; anticoagulant; response surface methodology

期刊名称：FERMENTATION-BASEL （ 影响因子：3.7； 五年影响因子：4.5 ）

ISSN：

年卷期： 2023 年 9 卷 5 期

页码：

收录情况： SCI

摘要： Fibrinolytic enzymes are a kind of proteolytic enzymes that can hydrolyze fibrin and dissolve blood clots. They could be used as a therapeutic agent for treating thrombosis. It is important for the treatment of cardiovascular disease to find and develop new thrombolytic drugs. In order to explore new fibrinolytic enzymes, a strain named 214L-11 with protease and fibrinolytic enzyme activity, which was isolated from the Flaming Mountain of Xinjiang Province, was screened using the skimmed milk plate, the blood powder agarose plate and the fibrin plate methods. Phylogenetic analyses showed that strain 214L-11 shared the highest similarity with Streptomyces fumanus NBRC 13042T (98.88%), which indicated that it represented a potential novel species in the Streptomyces genus. The fibrinolytic enzyme produced by 214L-11 displayed thrombolytic and anticoagulant activities, and it could degrade a single specific protein in the thrombus, thereby destroying the thrombus structure. The fermentation medium optimized through response surface methodology was 15 g/L soluble starch, g/L KNO3 0.58, 0.43 g/L peptone, 0.01 g/L FeSO4 center dot 7H(2)O, 0.5 g/L MgSO4 center dot 7H(2)O, 0.2 g/L Mn2+, 0.5 g/L NaCl and 1 L distilled water, pH 8, and the maximum amount of fibrinolytic enzyme produced by strain 214L-11 in the optimal fermentation medium was 1255.3 FU/mL. Overall, the fibrinolytic enzyme-producing strain was screened from the Flaming Mountain of Xinjiang for the first time, which provided a basis for further research and the development of new efficient and safe hemolytic drugs.

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