基于工程改进策略的高纯度和活性阿斯塔山丁的生产
Chaogang Wang1, Zeyu Hong2, Mingjian Song2
1Guangdong Technology Research Center for Marine Algal Bioengineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, PR China; Shenzhen Engineering Laboratory for Marine Algal Biological Development and Application, Shenzhen University, Shenzhen 518060, PR China.
Journal of biotechnology
|May 16, 2025
概括
这项研究通过系统的基因工程和发酵优化,增强了大肠杆菌中阿斯塔克桑丁的产量. 与天然和合成来源相比,工程化大肠杆菌产生了高纯度的阿斯塔山丁,具有优越的抗氧化活性.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 微生物生产 微生物生产
背景情况:
- 阿斯塔丁是一种有价值的胡卜素,具有显著的抗氧化特性.
- 目前的生产方法,主要是从Hematococcus pluvialis中提取或化学合成,面临局限性.
- 在大肠杆菌中开发微生物生产系统为可持续的阿斯塔丁供应提供了一个有希望的替代方案.
研究的目的:
- 系统地改善大肠杆菌中阿斯塔山丁的生产.
- 通过生物工程策略,实现阿斯塔山丁的高产量和纯度.
- 为了评估生物工程 Astaxanthin 的抗氧化活性.
主要方法:
- 大肠杆菌中阿斯塔山丁基因集群的遗传修饰,包括基因重复和融合.
- 用异质对应物 (例如,HpGGPPS3-1) 替换原生基因.
- 优化宿主菌株和发酵条件,包括料批发发酵.
- 奇拉性分析和抗氧化活性测定 (激素和超氧化离子清理).
主要成果:
- 大肠杆菌中的阿斯塔山丁含量显著增加,通过菌株工程和工艺优化达到3.61 mg/g的DCW.
- 料批发发酵实现了509.58毫克/升阿斯塔桑的最大产量,具有高生产率 (7.72毫克/升/小时).
- 与天然和合成阿斯坦丁相比,产生的阿斯坦丁表现出优越的基因和超氧化离子清除活性,与H. pluvialis阿斯坦丁相同的性.
结论:
- 逐步的生物工程策略有效地增强了大肠杆菌中阿斯塔山丁的生产.
- 经过工程设计的大肠杆菌系统能够生产具有强大的抗氧化特性的高纯度阿斯塔山丁.
- 这项研究提供了一个可行的微生物平台,用于可持续和高效地生产高价值的阿斯塔山丁.
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