在微生物宿主中通过"Repass"路径产生醇
David N Carruthers1, Isaac Donnell2, Eric Sundstrom3
1Biological Systems & Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA, USA.
Metabolic engineering
|January 27, 2025
概括
研究人员设计了微生物通路,以产生高度的先,一种先进的生物燃料和有价值的前体. 这一突破克服了选择性生产的挑战,为工业应用铺平了道路.
科学领域:
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
- 生物技术是生物技术.
背景情况:
- 醇和异醇是各种行业的关键先进生物燃料和生物合成前体.
- 之前的工程工作面临中等毒性和选择性产生的挑战.
- 由于前体异构化和毒性,达到高位的美酸盐 (MVA) 衍生前仍然难以捉摸.
研究的目的:
- 开发一种新的策略,用于选择性产前产.
- 通过工程微生物通路来增强先标位和纯度.
- 为了使得像德鲁巴宁这样的先化化合物的生物合成.
主要方法:
- 通过表达特定的异丁单酸盐激酶来改造大肠杆菌.
- 使用模型引导的酶替代二酸盐异相酶和酸酶.
- 实施了选择性单酸盐和二酸盐循环的新型"重复"路径.
- 配对工程路径与正规的MVA和"IPP-Bypass"路径.
- 同表达的prenyltransferaseacPT1用于德鲁巴宁的生产.
主要成果:
- 通过使用MVA途径,以30:1比率与异二醇达到300mg/L的先.
- 使用"IPP-Bypass"通路达到526 mg/L的先醇,与异二醇的比例为72,这是迄今为止最高的标位.
- 通过修改"IPP-Repass"通路,从p-coumarate产生48.3 mg/L的德鲁巴宁.
结论:
- 新的重传路径使单酸盐和二酸盐的选择性循环能够发生,大大改善了先位和选择性.
- 这一策略提供了一种独特的方法来调整二酸盐前体,以增强异oprenoid 生物合成.
- 证明了使用工程代谢途径产生有价值的先化化合物的潜力.
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