通过代谢工程和蛋白质工程有效地制造L-2,4-diaminobutyrate transaminase的ectoine
Bingmei Su1, Wen Yang2, Yi Zhou2
1College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China; Institute of Enzyme Catalysis and Synthetic Biotechnology, Fuzhou University, Fuzhou 350108, China.
International journal of biological macromolecules
|July 3, 2024
概括
工程化大肠杆菌现在可以高效地生产ectoine (一种化品成分) 具有高产量和葡萄糖转化. 这一突破使得工业规模的生态合成可以实现.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 蛋白质工程是指蛋白质的工程.
背景情况:
- 乙,一个四基胺,是一种有价值的透保护剂,用于化品和蛋白质稳定.
- 之前加强生殖素生产的努力受到低产量和葡萄糖转化能力差的限制.
- 需要一种能够生产高容量的ectoine和有效利用前体的微生物菌株.
研究的目的:
- 为了设计一种微生物菌株,以实现高效的ectoine生物合成.
- 为了提高生殖素生产能力和葡萄糖转化率.
- 开发一种可扩展的工业制方法.
主要方法:
- 在大肠杆菌BL21 (DE3) 中,来自Pseudomonas stutzeri的ectoine合成基因集群 (ectABC) 的过度表达.
- 限制速率的酶L-2,4-diaminobutyrate转氨酶 (EctBps) 的蛋白质工程.
- 代谢工程策略专注于前体的丰富和转化.
- 料批发发酵用于大规模的生殖素生产和净化.
主要成果:
- 经过基因和蛋白质工程后,乙的产量增加了382%,从1.73g/L增加到8.33g/L.
- 工程菌株YW20在料批发发酵中实现了68.9g/L的ectoine标位.
- 该过程产生了0.88g/L/h的时空产量和创纪录的34% (g/g) 的葡萄糖转化率.
- 纯化的ectoine达到99.7%的纯度,回收率为79.8%.
结论:
- 成功构建了一个高效的工程大肠杆菌菌株 (YW20),用于生化合成ectoine.
- 结合的代谢和蛋白质工程方法显著增强了乙的生产和葡萄糖的转化.
- 这项研究为工业规模的生物合成和素制备提供了一个强大的平台.
更多相关视频
相关概念视频
Extracorporeal Removal of Drugs: Hemoperfusion and Hemofiltration
359
Hemoperfusion and hemofiltration are critical techniques in medical treatments to eliminate accumulated drugs, metabolites, and electrolytes from the bloodstream. These methods are particularly vital in cases of accidental poisoning and drug overdose.Hemoperfusion involves passing blood through an adsorbent material to remove unwanted substances. The main adsorbents used in hemoperfusion include activated charcoal and Amberlite resins. Activated charcoal can adsorb both polar and nonpolar...
359
Pulmonary Embolism II: Diagnostic Studies and Interprofessional Care
714
Diagnosing Pulmonary EmbolismDiagnosing pulmonary embolism (PE) involves clinical assessment and advanced imaging tests. The preferred diagnostic tool is the spiral (helical) CT scan or CT angiography (CTA), which uses intravenous contrast media to visualize the pulmonary vasculature and identify emboli.A ventilation-perfusion (V/Q) scan is an alternative for patients unable to receive contrast media. This scan includes both perfusion and ventilation scanning. Perfusion scanning involves...
714


