在整个细胞中进行工程级联生物催化,用于注射剂酸生物生产
Xin Liu1, Yi An1, Haijun Gao2
1School of Life Science, Beijing Institute of Technology, No 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
Microbial cell factories
|June 2, 2024
概括
这项研究提出了一种新的绿色生物转化途径,用于使用工程Escherichia coli生产注射剂酸 (SA). 工程细菌通过多酶级联有效地将SA从什基米酸中合成,为化学合成提供了一个可持续的替代方案.
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:
- 酸 (SA) 是一种有价值的天然化合物,具有广泛的应用.
- 传统的SA化学合成是低效的,昂贵的,对环境不利的,涉及恶劣的条件和副产品.
研究的目的:
- 开发一种新的,可持续的生物转化途径用于注射剂酸 (SA) 生产.
- 从可再生的前体中设计一个微生物宿主,以实现高效的SA生物合成.
主要方法:
- 用于SA合成的Desulfuromonas酸氧化剂O-甲基转移酶 (DesAOMT) 的鉴定和表征.
- 在大肠杆菌中构建一个由四种酶组成的级联,用于从石基胺酸中进行SA生物合成.
- 大肠杆菌的代谢工程,包括途径优化和辅因子平衡,以增强SA生产.
主要成果:
- 经过工程设计,表达DesAOMT的大肠杆菌成功将酸转化为SA.
- 一个多酶级联使SA从什基米酸中的生物合成成为可能.
- 优化代谢系统和NADPH供应导致SA标位为133μM (26.2 mg/L).
结论:
- 在大肠杆菌中成功设计了一种新的多酶级联,用于SA生物合成.
- 鉴定到的DesAOMT酶对于催化酸对SA的甲基化至关重要.
- 这项研究为SA生产提供了一条绿色和高效的微生物途径,克服了化学合成的局限性.
相关概念视频
Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
The Citric Acid Cycle: Overview
17.0K
In aerobic organisms, the citric acid cycle is the second stage of cellular respiration wherein molecules derived from the breakdown of carbohydrates, proteins, and fats are oxidized into carbon dioxide and energy. This process is also known as the tricarboxylic acid (TCA) cycle as the first product of the cycle, citric acid, contains three carboxyl groups in its structure. Alternatively, this cycle is also referred to as the Krebs cycle, in honor of its discoverer Sir Hans Krebs.
The citric...
The citric...
17.0K
The Citric Acid Cycle: Output
7.8K
The citric acid cycle is termed an amphibolic pathway as it operates both anabolically and catabolically. The cyclic reactions balance the flux of the substrates to provide an optimal concentration of NADH and ATP to the cell.
Regulation of Citric Acid Cycle
The citric acid cycle is regulated in several ways, including feedback inhibition, regulation of enzyme activities, and associated anaplerotic or cataplerotic pathways.
The primary substrate of the TCA cycle—acetyl CoA—is...
Regulation of Citric Acid Cycle
The citric acid cycle is regulated in several ways, including feedback inhibition, regulation of enzyme activities, and associated anaplerotic or cataplerotic pathways.
The primary substrate of the TCA cycle—acetyl CoA—is...
7.8K
Fates of Pyruvate
8.4K
Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
8.4K


