食品科学 ›› 2009, Vol. 30 ›› Issue (19): 223-226.doi: 10.7506/spkx1002-6630-200919051

• 生物工程 • 上一篇    下一篇

pH和表面活性剂对酿酒酵母生物合成谷胱甘肽的影响

冮洁 1,单立峰2,吴耘红2,张鹭 2   

  1. 1.生物技术与资源利用国家民委- 教育部重点实验室,大连民族学院,辽宁大连 116600;
    2.齐齐哈尔大学生命科学与工程学院,黑龙江齐齐哈尔 161006
  • 收稿日期:2008-09-22 出版日期:2009-10-01 发布日期:2010-12-29
  • 通讯作者: 冮洁 E-mail:gangjie@dlnu.edu.cn ;gangjie1585@sina.com
  • 基金资助:

    辽宁省教育厅科研项目(20060154);大连民族学院博士启动基金资助项目(20066206)

Effects of pH value and Surfactants on Glutathione Biosynthesis by Saccharomyces cerevisiae

GANG Jie1,SHAN Li-feng2,WU Yun-hong2,ZHANG Lu2   

  1. 1. Key Laboratory of Biotechnology and Bioresources Utilization, The State Ethnic Affairs Commission-Ministy of Education,
    Dalian Nationalities University, Dalian 116600, China ; 2. College of Life Sciences and Engineering, Qiqihar University, Qiqihar
    161006, China
  • Received:2008-09-22 Online:2009-10-01 Published:2010-12-29
  • Contact: GANG Jie E-mail:gangjie@dlnu.edu.cn ;gangjie1585@sina.com

摘要:

本文考察了pH和表面活性剂对酿酒酵母生物合成谷胱甘肽的影响。设计了一种 pH控制策略,在酿酒酵母(Saccharomyces cerevisiae)HSJB1发酵过程中,对细胞进行短时间pH胁迫,当发酵24h时pH控制降低到1.5,可使胞内合成的GSH(谷胱甘肽)完全分泌到胞外,胞外GSH含量达到47.66mg/L。浓度为0.1% SDS(十二烷基磺酸钠)几乎完全抑制细胞的生长;0.1%浓度的蔗糖酯、吐温80、DMSO(二甲亚砜)则没有表现出对细胞生长的抑制作用,同时蔗糖酯、吐温80、DMSO对GSH的胞外分泌也没产生影响。Triton X-100(曲拉通) 在0.001%~0.3%浓度范围内,随着浓度的增加,对细胞生长的抑制作用增强;随着Triton X-100浓度的增加,胞外的GSH含量逐渐增加,胞内的GSH含量逐渐下降;Triton X-100浓度为0.3%时,在胞外积累21.45mg/L的GSH,而胞内GSH几乎为0;不同发酵时间添加Triton X-100所得到的GSH在胞内外的分布状况明显不同,加入Triton X-100的时间越晚,对细胞生长的抑制作用就越小,加入Triton X-100的浓度越大,胞外GSH的积累量越大,胞内GSH的含量随之明显下降。

关键词: 谷胱甘肽, 酿酒酵母, 生物合成, 曲拉通

Abstract:

In order to understand effects of pH value on glutathione (GSH) biosynthesis by Saccharomyces cerevisiae, a pHcontrol strategy was developed and applied in fed-batch production of GSH. Extracellular concentration of gultathione reached 47.66 mg/L when fermentation broth pH value was reduced to 1.5, and intracellular concentration of glutathione was 0.1% The addition of 0.1% SDS into fermentation broth revealed an inhibition effect on yeast growth. In contrast, sucrose ester, Tween- 80, DMSO did not exhibit effects on inhibition of yeast growth and secretion of GSH. On the other hand, yeast growth and secretion of GSH were obviously affected by Triton X-100. The higher concentration of Triton X-100 and the earlier addition resulted in more secretion of GSH.

Key words: glutathione, Saccharomyces cerevisiae, biosynthesis , Triton X-100

中图分类号: