改善微藻中多可萨赫萨酸合成的策略
Kunal Dutta1, Mariia S Ashikhmina1, Ekaterina V Skorb1
1Laboratory of Chemoinformatics, Infochemistry Scientific Center, ITMO University, Lomonosov, 9, 191002 Saint Petersburg, Russian Federation.
ACS synthetic biology
|September 15, 2025
概括
微藻提供了多可萨赫萨酸 (DHA) 的可持续来源,这是一种对大脑健康至关重要的omega-3脂肪酸. 研究重点是通过基因工程和具有成本效益的发酵介质优化DHA生产,实现高产量.
科学领域:
- 生物技术是生物技术.
- 海洋生物学 海洋生物学
- 营养科学 营养科学
背景情况:
- 多可萨赫萨酸 (DHA) 是一种对大脑发育至关重要的欧米茄-3脂肪酸,传统上是从鱼油中获取的.
- 鱼油的伦理采购面临着挑战,包括异味和持久有机污染物的污染.
- 微藻为DHA生产提供了一个可持续和可行的替代方案,但成本效益优化是关键.
研究的目的:
- 在过去十年 (2015-2025年) 中,从微藻中增强DHA生产的进展进行系统审查.
- 探索优化DHA产量的方法,重点关注基因工程,突变发生和成本有效的发酵策略.
- 分析微藻中高产量的DHA生产背后的分子机制.
主要方法:
- 从2015-2025年对微藻DHA生产的文献进行系统审查.
- 分析使用突变基因组学 (例如ARTP突变基因) 来提高产量的研究.
- 对基因工程技术的评估,包括基因过度表达和代谢途径的操纵.
- 使用低成本的碳和来源对发酵优化进行评估.
- 整合转录学和代谢学数据以了解DHA生物合成.
主要成果:
- 在ARTP突变发生过程中,达到了高达41.4g/L的DHA产量.
- 基因工程,包括碳水化合物和脂质代谢中的基因操纵,产生高达51.5g/L的DHA.
- 像玉米粉水解盐和大豆粉水解盐这样的低成本基质改善了生物质和DHA产量 (20.7 g/L).
- 使用甘糖和糖糖脱酶过度表达的适应性实验室进化增加了162.86% (25.26 g/L) 的DHA产量.
- 转录组学揭示了中央碳水化合物代谢,脂肪酸合成酶 (FAS) 和多基酸合成酶 (PKS) 途径中的上调基因,与高的NADPH和乙-CoA需求相关.
结论:
- 微藻类是高产量的DHA生产的有希望的可持续来源.
- 突变和基因工程显著提高了DHA产量.
- 用具有成本效益的营养素优化发酵介质对于经济可行性至关重要.
- 通过奥米克方法了解分子机制有助于进一步改善DHA生产的菌株.
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