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[1]杨子琼,李迪文,赵小斌,等.纳豆激酶高产菌株的复合诱变选育[J].武汉工程大学学报,2022,44(01):76-80.[doi:10.19843/j.cnki.CN42-1779/TQ.202104001]
 YANG Ziqiong,LI Diwen,ZHAO Xiaobin,et al.Breeding of High-Yield Nattokinase Strains by Compound Mutagenesis[J].Journal of Wuhan Institute of Technology,2022,44(01):76-80.[doi:10.19843/j.cnki.CN42-1779/TQ.202104001]
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纳豆激酶高产菌株的复合诱变选育(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
44
期数:
2022年01期
页码:
76-80
栏目:
生物与环境工程
出版日期:
2022-02-28

文章信息/Info

Title:
Breeding of High-Yield Nattokinase Strains by Compound Mutagenesis
文章编号:
1674 - 2869(2022)01 - 0076 - 05
作者:
杨子琼李迪文赵小斌刘登辉张佑红*
武汉工程大学环境生态与生物工程学院,湖北 武汉 430205
Author(s):
YANG ZiqiongLI DiwenZHAO XiaobinLIU DenghuiZHANG Youhong*
School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, China
关键词:
纳豆激酶枯草芽孢杆菌复合诱变菌种选育
Keywords:
nattokinase Bacillus subtilis compound mutagenesis strain breeding
分类号:
Q93-33
DOI:
10.19843/j.cnki.CN42-1779/TQ.202104001
文献标志码:
A
摘要:
采用复合诱变的方法筛选高产纳豆激酶的突变菌株。以前期实验室从纳豆食品中筛选并保存的纳豆枯草芽孢杆菌XD2为出发菌株,对其进行甲基磺酸乙酯诱变试验和紫外诱变实验,确定0.1 mol/L EMS最佳处理时间为40 min,紫外线最佳照射时间为120 s;通过复合诱变及添加LiCl的初筛培养基进行初筛及摇瓶发酵复筛,筛选到纳豆激酶能力提升的6株菌株;进一步通过遗传稳定性试验,确定成功筛选到一株高产纳豆激酶且产酶稳定性良好的突变菌株YC4,发现其发酵时间48 h,纳豆激酶酶活力为8 450.55 IU/mL,是出发菌株XD2的2.42倍,说明复合诱变效果良好,显著提高了产酶效益,降低了生产成本。
Abstract:
The compound mutagenesis method was used to screen high yield mutant strains with high yield of nattokinase. Bacillus subsubis XD2, screened from natto food in our laboratory, was utilized as the original strain to investigate mutagenesis by ethyl methane sulfonate(EMS) mutagenesis test combined with ultraviolet light(UV) mutagenesis test. The optimal treatment time of 0.1 mol/L EMS is 40 min, and the optimal UV irradiation time is 120 s. Based on the above-mentioned strategy of compound mutagenesis, LiCl-added primary screening and re-screening of shake-flask fermentation were carried out to obtain nattokinase-producing strains with high efficiency, in which 6 strains with improved nattokinase capacity were obtained. Following by genetic stability analysis, a mutant strain YC4 with high yield of nattokinase and good stability was successfully screened. For fermentation 48 h, the maximal activity of nattokinase is 8 450.55 IU/mL, which is 2.42 times higher than that of the original strain XD2. All results indicate that the compound mutagenesis is one promising strategy for significantly enhancing enzyme yield and reducing the production cost.

参考文献/References:

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相似文献/References:

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备注/Memo

备注/Memo:
收稿日期:2021-04-01作者简介:杨子琼,硕士研究生。E-mail:291583032@qq.com*通讯作者:张佑红,博士,教授。E-mail:youhong@aliyun.com引文格式:杨子琼,李迪文,赵小斌,等. 纳豆激酶高产菌株的复合诱变选育[J]. 武汉工程大学学报,2022,44(1):76-80.
更新日期/Last Update: 2022-03-01