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用筛选抗分解代谢阻遏突变株法选育谷氨酰胺转胺酶的高产菌株

Screening and Breeding of High-yield Transglutaminase (TGase)-producing Streptomyces hygroscopicus Strain Resistant to 2-deoxy-D-Glucose Repression

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【作者】 许晓娟李江华张东旭陈坚堵国成

【Author】 XU Xiao-juan,LI Jiang-hua,ZHANG Dong-xu,CHEN Jian,DU Guo-cheng (Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China)

【机构】 江南大学生物工程学院,工业生物技术教育部重点实验室

【摘要】 以吸水链霉菌(Streptomyces hygroscopicus)CCTCCM203062为出发菌株,采用N离子注入和紫外诱变处理,得到MTG酶活达到7.19U/ml的高产菌株BB-2。对BB-2再进行紫外诱变,选育出具有较好稳定遗传性的抗2-脱氧-D-葡萄糖的高产突变株DG-1,酶活达到9.21U/ml,比出发菌株提高了118.5%。

【Abstract】 In the present study, through mutagenizing Streptomyces hygroscopicus CCTCC M203062 with UV and Nimplantation, a mutant strain BB-2 with TGase activity of 7.19 U/ml was obtained. Then a new stain DG-1 resistant to 2-deoxyD-glucose (2-DG) repression was obtained from the mutant strain BB-2 by repeated UV radiation, with good genetic stability and TGase activity of 9.21 U/ml, which was higher 118.5% than that of the original strain CCTCC M203062.

【基金】 国家自然科学基金项目(30770055;20776063);江苏省高新技术研究项目(BG2007009);江苏省自然科学基金项目(BK2007018)
  • 【文献出处】 食品科学 ,Food Science , 编辑部邮箱 ,2009年09期
  • 【分类号】Q933
  • 【被引频次】10
  • 【下载频次】316
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