从各种原料中过度生产的 riboflavin 与工程Corynebacterium glutamicum的过度生产
Fernando Pérez-García1, Luciana Fernandes Brito1, Thea Isabel Bakken1
1Department of Biotechnology and Food Science, Faculty of Natural Sciences, Norwegian University of Science and Technology, Trondheim, Norway.
Biofabrication
|July 12, 2024
概括
我们利用合成操作子和代谢工程优化了Corynebacterium glutamicum中的 рибофлавин生产. 这实现了创纪录的8.3g/L的里波弗拉标位,甚至使用了可持续的原料,如水解米.
科学领域:
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
- 微生物生物技术 微生物生物技术
背景情况:
- рибофлавин (维生素B2) 是一种必需的营养素,有着重要的工业需求.
- 优化像Corynebacterium glutamicum这样的微生物生产菌株对于高效和成本效益的合成至关重要.
研究的目的:
- 通过合成操作子设计和代谢途径工程来增强Corynebacterium glutamicum中的利博氨酸过度生产.
- 通过使用可持续和替代碳原料,实现高位的 рибофлавин生产.
主要方法:
- 对合成操作子进行选,以检测细调的 рибофлавин生物合成基因 (ribGCAH) 表达.
- 过度表达的果糖-1,6-双酸盐酶 (fbp) 和5-基-1-酸盐氨基转移酶 (purF) 基因,以重定向代谢流量.
- 对C. glutamicum进行基因工程,以利用西洛斯和曼尼托尔.
主要成果:
- 通过优化基因表达,通过优化基因表达,通过优化基因表达,在不影响细胞生长的情况下实现了利博夫拉的过度生产.
- 在基于葡萄糖的食批发发酵中达到8.3g/L的里博夫拉标位记录.
- 已证明成功地使用氧化 (大米水解剂,废硫酸盐液) 和曼尼托尔 (棕色海藻水解剂) 作为原料生产 рибофлавин.
- 与葡萄糖相比,大米水解剂的利比弗拉含量高出30%.
结论:
- 合成操作子工程和代谢流量重定向是C. glutamicum中高滴度里博夫拉生产的有效策略.
- 经过工程设计的C. glutamicum可以有效地利用纤维素糖和海藻衍生糖来合成利博弗拉.
- 这项工作为可持续和高产量的维生素B2生产提供了一个有希望的平台.
相关概念视频
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
Synthetic Biology
4.7K
Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
Golden rice
Golden rice is a genetically modified...
Golden rice
Golden rice is a genetically modified...
4.7K


