改造Corynebacterium glutamicum的新陈代谢,用于高水平的丹西生产
Dan Huang1, Xin Wang1, Wei-Bing Liu1
1Laboratory of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Bioresource technology
|September 25, 2023
概括
科学家们对Corynebacterium glutamicum进行了基因工程设计,用于基因生物合成. 这种微生物发酵方法为植物提取提供了一个可持续的替代方案,用于生产这种有价值的医疗化合物.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
背景情况:
- 丹西辛是一种有价值的化合物,具有医学应用.
- 目前的生产依赖于低效的植物提取方法.
- 需要一种可持续和高效的生产方法.
研究的目的:
- 为了设计Corynebacterium glutamicum用于dencichine的de novo生物合成.
- 为了建立一个微生物发酵过程,用于dencichine的生产.
- 为植物提取提供可持续的替代品.
主要方法:
- 在Corynebacterium glutamicum中进行代谢途径重塑.
- 引入外源酶用于L-2,3-diaminopropionate (L-DAP) 和氧化辅酶A的合成.
- 过度表达关键基因并减少竞争性通路.
- 整合BAHD酶用于最终的基因合成.
主要成果:
- 成功建立了L-DAP的合成途径,实现了628mg/L的产量.
- 通过glyoxylate转化创建了一个oxalyl-CoA合成途径.
- 在C. glutamicum中实现了de novodencichine合成,在48小时的发酵中达到31.75mg/L.
- 在这种微生物宿主中证明了第一个成功的dencichine生物合成.
结论:
- 康瑞尼细菌 (Corynebacterium glutamicum) 的代谢工程使得它能够有效地生产基因.
- 微生物发酵提供了一个有希望和可持续的路线为dencichine供应.
- 这项研究为微生物生产其他天然产品铺平了道路.
相关概念视频
01:23Microbial Fermentation
50
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
50
01:24Biosynthesis in Bacteria
32
Biosynthesis in bacteria is a fundamental anabolic process that generates essential macromolecules, including proteins, nucleic acids, lipids, and polysaccharides. These macromolecules are critical for cellular growth, replication, and function. The process is tightly regulated and energetically linked to catabolic pathways to ensure optimal resource utilization.Biosynthetic pathways begin with precursor metabolites such as pyruvate, acetyl-CoA, and glucose-6-phosphate derived from glycolysis,...
32
01:15Metabolism of Chemolithotrophs
33
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
33
01:29Methods for Controlling Microbial Growth
59
Microbial growth control refers to various methods employed to inhibit, reduce, or eliminate microorganisms to ensure safety and hygiene across different settings. These methods are categorized based on the target environment and the level of microbial control required.Biocides are versatile agents designed to control microorganisms by either inhibiting their growth or outright killing them. These agents work through various physical, chemical, mechanical, or biological mechanisms. The...
59