食品科学
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苗兰兰,张东杰*,王 颖
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MIAO Lan-lan,ZHANG Dong-jie*,WANG Ying
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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
中图分类号:
F407.82
苗兰兰,张东杰*,王 颖. 复合诱变高产金属硫蛋白酵母菌株的筛选[J]. 食品科学, doi: 10.7506/spkx1002-6630-201319053.
MIAO Lan-lan,ZHANG Dong-jie*,WANG Ying. Combined Mutation Screening of High-activity Saccharomyces cerevisiae Strain Capable of Producing Metallothionein[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201319053.
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链接本文: https://www.spkx.net.cn/CN/10.7506/spkx1002-6630-201319053
https://www.spkx.net.cn/CN/Y2013/V34/I19/261