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A Toolkit to Enable Hydrocarbon Conversion in Aqueous Environments
Published on: October 2, 2012
从代谢工程酵母中产生化激活醇
Ran Xu1, William K Wilson, Seiichi P T Matsuda
1Department of Chemistry, Rice University, Houston, Texas 77005, USA.
Journal of the American Chemical Society
|February 7, 2002
概括
代谢工程酵母现在有效地产生化激活醇 (MAS),这是关键的生殖调节剂. 这一突破为获得MAS提供了与难以实现的化学合成或自然隔离方法的可行替代方案.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 中转化激活醇 (MAS) 是生殖过程的重要调节剂.
- 目前通过化学合成或自然分离获得MAS的方法具有挑战性和低效.
研究的目的:
- 开发能够积累MAS作为其主要的固醇产品的代谢工程酵母菌株.
- 建立一个更容易获得和更有效的方法,用于MAS生产.
主要方法:
- 在Saccharomyces cerevisiae中利用同源重组来创建erg24Δ erg25Δ hem1Δ突变菌株.
- 设计的菌株缺乏特定的固醇修饰酶 (Delta14减少酶,C-4氧化酶,delta-aminolevulinate合成酶).
- 删除HEM1促进了固醇进口,在有氧条件下确保了菌株的生存能力.
主要成果:
- 工程酵母菌株积累了MAS作为主要的固醇.
- 具体来说,erg24Δ erg25Δ hem1Δ突变产生的4,4-二甲基-5alpha-cholesta-8,14,24-三-3β-ol (FF-MAS). 这种突变的结果是:
- 发酵产生了大约5μg的FF-MAS每毫升的培养,显示出有利的生产产量.
结论:
- 代谢工程的Saccharomyces cerevisiae为MAS生产提供了一个有效的平台.
- 这种基于酵母的发酵方法为传统的MAS获取技术提供了有竞争力的替代方案.
- 开发的菌株有效地积累了特定的MAS化合物,解决了以前的生产限制.
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