食品科学 ›› 2009, Vol. 30 ›› Issue (9): 120-123.doi: 10.7506/spkx1002-6630-200909001

• 生物工程 • 上一篇    下一篇

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

许晓娟,李江华,张东旭,陈 坚,堵国成   

  1. 江南大学生物工程学院,工业生物技术教育部重点实验室
  • 收稿日期:2008-08-18 修回日期:2008-12-18 出版日期:2009-05-01 发布日期:2010-12-29
  • 通讯作者: 堵国成 E-mail:gcdu@jiangnan.edu.cn
  • 基金资助:

    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)

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

XU Xiao-juan LI Jiang-hua ZHANG Dong-xu CHEN Jian DU Guo-cheng*   

  1. Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University,
    Wuxi 214122, China
  • Received:2008-08-18 Revised:2008-12-18 Online:2009-05-01 Published:2010-12-29
  • Contact: DU Guo-cheng E-mail:gcdu@jiangnan.edu.cn

摘要:

以吸水链霉菌(Streptomyces hygroscopicus)CCTCC M203062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7.19 U/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%。

关键词: 谷氨酰胺转胺酶, 吸水链霉菌, 紫外诱变, N离子注入, 2-脱氧-D-葡萄糖

Abstract:

In the present study, through mutagenizing Streptomyces hygroscopicus CCTCC M203062 with UV and N-implantation, a mutant strain BB-2 with TGase activity of 7.19 U/ml was obtained. Then a new stain DG-1 resistant to 2-deoxy-D-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.

Key words: TGase, Streptomyces hygroscopicus, UV mutagenization, N+-implantation, 2-deoxy-D-glucose

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