生物技术通报 ›› 2014, Vol. 0 ›› Issue (12): 173-176.doi: 10.13560/j.cnki.biotech.bull.1985.2014.12.029

• 研究报告 • 上一篇    下一篇

链霉素抗性突变理性筛选新霉素高产菌株

陈宏 ,张祝兰 ,孙菲, 张引, 周璟明, 郑榕   

  1. 福建省微生物研究所 福建省新药微生物筛选重点实验室,福州 350007
  • 收稿日期:2014-05-13 出版日期:2014-12-08 发布日期:2014-12-12
  • 作者简介:陈宏,高级工程师,研究方向:微生物菌种选育与发酵;E-mail:peaceful88@163.com
  • 基金资助:
    国家“十一五”“重大新药”创制项目(2010ZX09401-403),福建省自然科学基金项目(2012J01094)

Streptomycin-resistant Rational Screening for High-yield Neomycin Producing Strain

Chen Hong, Zhang Zhulan, Sun Fei, Zhang Yin, Zhou Jingming, Zheng Rong   

  1. (Fujian Institute of Microbiology, Fujian Provincial Key Laboratory of Screening for Novel Microbial Products, Fuzhou 350007)
  • Received:2014-05-13 Published:2014-12-08 Online:2014-12-12

摘要: 采用化学诱变剂 NTG 结合链霉素抗性筛选法获得新霉素高产菌株。出发菌株费氏链霉菌(Streptomyces fradiae) FS1109 的孢子悬液经不同剂量的化学诱变剂 NTG 处理后,涂布在含链霉素最小抑制浓度(3 μg/mL)的培养基平板上培养,获得 大量的链霉素抗性突变株。经影印法初筛和摇瓶发酵复筛,正突变率高于负突变率,获得一株遗传性状稳定的 Streptomyces fradiae Str 63 菌株,其新霉素生物活性单位比出发菌株提高了 50% 以上,且 C 组分较出发菌株的低。

关键词: 费氏链霉菌, 新霉素, 链霉素抗性筛选, 突变

Abstract: NTG mutagenesis and streptomycin resistance screening was applied to screen neomycin high producing strain. A number of streptomycin-resistant(str)mutants were obtained from original strain of Streptomyces fradiae FS1109 treated with three different dosage of NTG under the selection pressure of resistance to streptomycin(the lethal concentration is 3 μg/mL). Streptomycin-resistant mutants strain Str63 was obtained with high neomycin yield by replica plating method and the neomycin productivity could be more than 50% higher and the component of C was lower than that of the original strain in the rotation-flask experiments, the rate of the positive mutation was larger than that of the negative mutation.

Key words: Streptomyces fradiae, Neomycin, Streptomycin resistance screening, Mutation