工程Pseudomonas taiwanensis用于高效的基于chorismate的单和二基酸盐的生产
Franziska Kofler1, Tobias Schwanemann1,2, Nadine Teófilo da Silva1
1Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, 52425, Jülich, Germany.
Metabolic engineering communications
|February 24, 2026
概括
芳香化合物的可持续生产至关重要. 这项研究通过使用工程化*Pseudomonas taiwanensis*来增强基酸盐的生物催化,通过修改PheA酶以利用可再生资源来实现更高的产量.
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:
- 芳香化合物是重要的,但传统上来自不可持续的化石资源.
- 全细胞生物催化提供了使用可再生碳来源的可持续替代方案.
- 里酸盐,是石基酸盐通路的中间体,是工业相关芳香物的关键前体.
研究的目的:
- 为了工程师 * 伪人马台灣人 * 从 chorismate 增强生物催化生成基酸盐.
- 选和优化双功能酶PheA的修改,以重定向代谢流量.
- 为了提高特定芳香化合物的产量,如2-基,2,3-二基,3-基,4-基和2,5-二基酸盐.
主要方法:
- 选多种途径,用于在过度生产氨酸的菌株中进行化酸衍生生物生产.
- 系统选了12种针对可里斯马酸变异酶/先酸脱水酶 (PheA) 酶的修饰物.
- 对各种基酸盐生产模块的有前途的PheA修饰的评估和与辅助性对照菌株的比较.
主要成果:
- 工程*P. taiwanensis*成功地产生了五种不同的单和二基酸盐.
- 修改PheA减少了向氨酸和氨酸的流量,增强了酸的生产目标.
- 将原生*pheA*替换为*Escherichia coli*同类,结合特定的遗传元素,产量增加了高达38.2%.
- 获得的最高标位是3.59mM 4-基酸,从葡萄糖中产出的产量为20.9% (Cmol/Cmol).
结论:
- PheA的代谢工程是有效的改善生物催化生产的基酸.
- 大肠杆菌PheA同源为增强芳香化合物生物合成提供了显著的优势.
- 优化酶修饰和了解宿主特定的代谢相互作用对于最大限度地提高生物催化剂产量至关重要.
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