生物技术通报 ›› 2019, Vol. 35 ›› Issue (7): 70-75.doi: 10.13560/j.cnki.biotech.bull.1985.2019-0109

• 研究报告 • 上一篇    下一篇

来自光裸方格星虫产纤溶酶蜡状芽孢杆菌的鉴定

李小媚, 周宗慧, 尹秀华, 江虹锐, 刘小玲   

  1. 广西大学轻工与食品工程学院,南宁 530004
  • 收稿日期:2019-01-31 出版日期:2019-07-26 发布日期:2019-07-29
  • 作者简介:李小媚,硕士研究生,研究方向:海洋微生物代谢产物;E-mail:1256996927@qq.com
  • 基金资助:
    广西创新驱动发展专项资金项目(AA17204075)

Identification of Bacillus cereus Strain Producing Fibrinolytic Enzyme from Sipunculus nudus

LI Xiao-mei, ZHOU Zong-hui, YIN Xiu-hua, JIANG Hong-rui, LIU Xiao-ling   

  1. Institute of Light Industry and Food Engineering,Guangxi University,Nanning 530004
  • Received:2019-01-31 Published:2019-07-26 Online:2019-07-29

摘要: 对广西北部湾光裸方格星虫中产纤溶酶菌株进行筛选和鉴定,结合脱脂乳平板与纤维蛋白板筛选出产纤溶酶菌株,并对其粗酶液的血栓溶解机制进行了体外初步研究。结果显示,从光裸方格星虫获得5株产纤溶酶菌株,其中GXUSP-1菌株纤溶酶粗酶活力(相当尿激酶酶活力单位)为303.2 U/mL,经初步鉴定该菌为蜡状芽孢杆菌属,属于海洋共生菌,该菌株粗酶液能通过直接和间接两种方式溶解血栓,且体外溶解血栓作用显著。GXUSP-1具有良好的潜在工业应用价值。

关键词: 光裸方格星虫, 纤溶酶, 蜡状芽孢杆菌, 鉴定

Abstract: Screening and isolating the fibrinolytic strains of Sipunculus nudus in the North of Guangxi by a combination of skim milk plate and fibrin plate assay,the specificity and fibrinolytic mechanism of the strain were analyzed. As a result,5 strains isolated and screened from Sipunculus nudus showed ability of fibrin degradation. The crude enzyme fermented from the strain GXUSP-1 presented the maximal fibrinolytic activity as 303.2 U/mL(equivalent to urinary kinase activity unit). GXUSP-1 was identified as Bacillus cereus,and belonged to marine symbiotic bacteria. Meanwhile,thrombolytic effect in vitro of the crude enzyme fermented from GXUSP-1 was significant,which dissolved thrombus both directly and indirectly. GXUSP-1 demonstrates promising potential industrial application.

Key words: Sipunculus nudus, fibrinolytic enzyme, Bacillus cereus, identification