通过L-lysine进口者工程来增强Streptomyces albulus中的e-poly-L-lysine生产
Daojun Zhu1, Jiawei Zhang1, Shangyu Li1
1Key Laboratory of Industrial Biotechnology of the Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
Metabolic engineering
|July 27, 2025
概括
在微生物细胞工厂的工程L-lysine进口商显著提高了ε-Poly-L-lysine (ε-PL) 的生产. 这项研究实现了创纪录的94.0g/L的e-PL产量,优化了工业应用的生物合成.
科学领域:
- 生物技术是生物技术.
- 微生物工程 微生物工程
- 代谢工程是代谢工程.
背景情况:
- ε-Poly-L-lysine (ε-PL) 是一种具有广泛工业应用的多功能生物聚合物.
- 开发高效的微生物细胞工厂 (MCF) 用于 ε-PL 生产至关重要,但具有挑战性.
- 优化营养吸收是增强e-PL生物合成的关键.
研究的目的:
- 识别和设计L-氨酸进口商,以提高在*Streptomyces albulus*中的e-PL生产.
- 提高微生物细胞工厂对e-PL生物合成的效率.
- 通过传送器工程实现 ε-PL 的创纪录产量.
主要方法:
- 系统选和识别L-氨酸进口商在*Streptomyces albulus*GS114.4.中.
- 生物信息学分析,分子对接,转录分析和基因操纵以确认传送器功能.
- 在工程菌株中运输体 (GL6157) 和e-poly-L-lysine synthase (pls) 表达的组合优化.
主要成果:
- 确定GL6157作为*Streptomyces albulus*GS114.4中的主要L-氨酸进口者.
- 设计了*S. albulus* GS114/pls-GL6157菌株,增强了L-lysine的吸收和e-PL的合成.
- 在料批发发酵中实现了创纪录的94.0g/L的e-PL产量,明显超过了之前的报道.
结论:
- 传送器工程是一种高度有效的策略,用于增强工业MCF中的e-PL生物合成.
- 通过传送器工程优化L-氨酸的吸收对于高产率的e-PL生产至关重要.
- 工程菌株和方法为工业 ε-PL 制造提供了一个强大的平台.
更多相关视频
13:53Homogeneous Glycoconjugate Produced by Combined Unnatural Amino Acid Incorporation and Click-Chemistry for Vaccine Purposes
Published on: December 19, 2020
5.1K
07:26Site Specific Lysine Acetylation of Histones for Nucleosome Reconstitution using Genetic Code Expansion in Escherichia coli
Published on: December 26, 2020
4.1K
相关概念视频
Bioreactor Controls-III
67
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
67
Production of Organic Acids
105
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
105
Production of Antibiotics
265
Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
265
Production of Pharmaceuticals
94
Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under...
94
