食品科学

• 生物工程 • 上一篇    下一篇

复合诱变高产金属硫蛋白酵母菌株的筛选

苗兰兰,张东杰*,王 颖   

  1. 黑龙江八一农垦大学食品学院,黑龙江 大庆 163319
  • 出版日期:2013-10-15 发布日期:2013-09-27
  • 通讯作者: 张东杰

Combined Mutation Screening of High-activity Saccharomyces cerevisiae Strain Capable of Producing Metallothionein

MIAO Lan-lan,ZHANG Dong-jie*,WANG Ying   

  1. College of Food Science, Heilongjiang Bayi Agricultural University, Daqing 163319, China
  • Online:2013-10-15 Published:2013-09-27
  • Contact: ZHANG Dong-jie

摘要:

以酿酒酵母31206为出发菌株,采用紫外、微波及NTG复合诱变,经过初筛、复筛、再复筛的方法筛选出金属硫蛋白产量较高的一株菌,总蛋白含量的测定用考马斯亮蓝G-250法,金属硫蛋白含量的检测用酶联免疫分析法(ELISA法),巯基活性的检测用简化巯基试剂(DTNB法)。诱变后总蛋白含量由原来的44.6mg/g菌体提高到170.2mg/g菌体,金属硫蛋白含量由原来38.3ng/L提高到163.4ng/L,巯基活性由原来的0.029μmol提高到0.146μmol。

关键词: 酿酒酵母, 复合诱变, 筛选, 金属硫蛋白

Abstract:

Saccharomyces cerevisiae 31206 was mutagenized by means of combined treatment with UV light, microwave and NTG.
After primary and secondary screening, a high-activity strain capable of producing metallothionein was obtained. Total protein content
was determined by Coomassie brilliant blue G-250 method, metallothionein content by ELISA, and sulfhydryl activity by DTNB
method. The total protein content, metallothionein content and sulfhydryl activity of the mutant strain were 170.2 mg/g cells, 163.4 ng/L
and 0.146 μmol, respectively, whereas those of the parental strain were 44.6 mg/g cells, 38.3 ng/L and 0.029 μmol, respectively.

Key words: Saccharomyces cerevisiae, combined mutation, screening, metallothionein

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