生物技术通报 ›› 2013, Vol. 0 ›› Issue (5): 155-160.

• 研究报告 • 上一篇    下一篇

基因组重排选育Epothilone B高产菌株

王大红1, 刘飞2   

  1. (1.河南科技大学食品与生物工程学院,洛阳 471023;2.南阳师范学院生命科学与技术学院,南阳 473061)
  • 收稿日期:2012-11-05 修回日期:2013-05-24 出版日期:2013-05-24 发布日期:2013-05-24
  • 作者简介:王大红,男,博士,讲师,研究方向:发酵工程和微生物制药;E-mail:wangdahong2003@163.com
  • 基金资助:
    河南科技大学青年科学基金项目(2012QN003)

Breeding of High Epothilone B-producing Strains by Genome Shuffling

Wang Dahong1, Liu Fei2   

  1. (1. College of Food and Bioengineering,Henan University of Science and Technology,Luoyang 471023;2. School of Life Science and Technology,Nanyang Normal University,Nanyang 473061)
  • Received:2012-11-05 Revised:2013-05-24 Published:2013-05-24 Online:2013-05-24

摘要: 以纤维堆囊菌AHB125经过紫外诱变和2%乙酸钠抗性筛选出来的SC4-14和SC4-56为出发菌株,采用基因组重排技术选育Epothilone B高产菌株,并探索该技术在菌种选育中的基本规律。通过4轮基因组重排成功选育出了5株遗传稳定的Epothilone B高产菌株,其中1株重排菌株F4-28 Epothilone B产量达到67.4 mg/L,是原始菌株纤维堆囊菌AHB125 Epothilone B产量的8倍,是两亲本菌株Epothilone B产量的4-5倍,并且F4-28的发酵周期比SC4-56短1 d。因此,基因组重排技术可有效的选育出Epothilone B高产菌株。

关键词: Epothilone, B, 纤维堆囊菌, AHB125, 基因组重排

Abstract: The mutation of Sorangium cellulosum AHB125 was induced using the classical UV-mutation method plus selection pressures of 2% sodium acetate. Two mutants, SC4-14 and SC4-56, were used as original strains to screen and breed high Epothilone B-producing strains by genome shuffling and explore the basic rule of genome shuffling in strain breeding. Five hereditarily stable strains with high Epothilone B production were obtained after four cycles of genome shuffling. Strain F4-28 yielded 67.4 mg/L of Epothilone B, which was 8-fold higher than that of the initial strain S. cellulosum AHB125 and 4 to 5-fold higher than the mutants used as the original strains for genome shuffling. In addition, the fermentation period of F4-28 was one day shorter than that of SC4-56. The technique of genome shuffling was an efficient method to screen and breed high Epothilone B-producing strains.

Key words: Epothilone, B, Sorangium cellulosum, AHB125, Genome shuffling