一种新的Zymomonas mobilis平台菌株,用于有效生产化学品
Jonas Frohwitter1, Gerrich Behrendt1, Steffen Klamt1
1Analysis and Redesign of Biological Networks, Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstr. 1, 39106, Magdeburg, Germany.
Microbial cell factories
|May 21, 2024
概括
经过工程改造的Zymomonas mobilis (Z. mobilis) 具有可控制的pyruvate decarboxylase (PDC) 表达,可以有效地生产D-乳酸盐和L-氨酸. 这种平台菌株增强了Z. mobilis作为生物技术应用的多功能工作马.
科学领域:
- 微生物学 微生物学
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
背景情况:
- 齐莫莫纳斯莫比利斯是一种高效的乙醇生产者,这是由于其酸盐脱碳酶 (PDC) 的作用.
- 酸盐衍生化合物的代谢工程需要调节PDC活性,因为它的基因 (pdc) 被认为是必不可少的.
- 控制PDC表达对于重定向pyruvate流量至关重要.
研究的目的:
- 开发一种具有可诱导PDC表达的Z. mobilis平台菌株.
- 为了证明这种菌株能够生产D-乳酸盐和L-氨酸.
- 为了建立一个通用的微生物底盘,用于pyruvate衍生化学合成.
主要方法:
- 在Z. mobilis中用IPTG可诱导的PT7A1促进体取代了原生pdc促进体,从而产生了sGB027菌株.
- 引入了大肠杆菌的乳酸脱酶基因,用于生产D-乳酸盐.
- 引入了Geobacillus stearothermophilus L-alanine脱酶基因,用于生产L-alanine.
主要成果:
- 在新型Z. mobilis平台菌株sGB027.7中实现可控的pdc表达.
- 在Z. mobilis.中生产了具有创纪录的高特异性生产率和产量的D-乳酸盐.
- 成功生产了L-alanine,展示了该菌株的广泛适用性.
结论:
- 开发的Z. mobilis平台菌株 (sGB027) 是生产各种酸盐衍生化合物的强大工具.
- 这种工程菌株显著提高了Z. mobilis作为生物技术工作马的潜力.
- 促进了超越乙醇的有价值化学物质的高效生物合成.
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