工程可控改变马洛尼尔-CoA水平以增强聚基化物生产
Sarah H Klass1,2,3, Mia Wesselkamper4, Aidan E Cowan1,5
1Joint BioEnergy Institute, Emeryville, CA, USA.
Nature chemical biology
|June 11, 2025
概括
这项研究通过工程malonyl-CoA (M-CoA) 生物合成来增强大肠杆菌中的聚克化物生产. 新的途径提高M-CoA水平,增加有价值的化合物产量,改善微生物宿主生物合成.
科学领域:
- 生物技术是生物技术.
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
背景情况:
- 在大肠杆菌中,聚克化合成酶 (PKS) 基因的异质表达是生产天然和合成化合物的关键方法.
- 大肠杆菌中有限的马洛尼尔-CoA (M-CoA) 可用性阻碍了高滴度聚基胺的产生.
研究的目的:
- 为了克服大肠杆菌中M-CoA的限制,以增强聚基化物生物合成.
- 为改进微生物生产系统设计一种新的M-CoA供应途径.
主要方法:
- 破坏原生M-CoA生物合成途径.
- 引入一个与马洛纳特运输体和M-CoA结合酶的直角通路.
- 补充马洛纳和适应性实验室进化的补充.
主要成果:
- 实现了显著增加的M-CoA水平.
- 观察到脂肪酸和多基基酸的度增加.
- 减少了PKSs对不需要的乙-CoA基质的乱交活动.
结论:
- 改造的大肠杆菌菌株是聚基化生物合成的优越宿主.
- 这一战略促进了对微生物系统中M-CoA代谢的理解.
- 开发的方法通过微生物发酵改善了有价值化合物的生产.
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