通过代谢工程的Corynebacterium glutamicum生产紫外线A保护性C50胡卜素脱素
Fynn Stegelmann1, Jan Seeger1, Petra Peters-Wendisch1
1Genetics of Prokaryotes, Faculty of Biology and Center for Biotechnology (CeBiTec), Bielefeld University, Universitaetsstr. 25, D-33615 Bielefeld, Germany.
Bioresource technology
|September 12, 2025
概括
谷氨酸的Corynebacterium被设计为产生高标位的decaprenoxanthin,一个C50类胡卜素. 这项研究增强了对C50类胡卜素生产及其抗氧化特性的理解.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 代谢工程是代谢工程.
背景情况:
- 胡卜素是化品,食品和料中的重要化合物,其中C40胡卜素是最常见的.
- 谷氨酸菌 (Corynebacterium glutamicum) 是一种成熟的宿主,可以产生像阿斯塔克桑丁这样的C40类胡卜素.
- 在C. glutamicum中,原生C50胡卜素,脱素,在很大程度上仍然没有被描述.
研究的目的:
- 为了改造C. glutamicum以提高C50类胡卜素脱素的产量.
- 为了研究葡萄糖化对dekaprenoxanthin的特性的影响.
- 为大规模生产罕见的C50胡卜素奠定基础.
主要方法:
- 在C. glutamicum中基因组编辑和基于等离子体的胡卜素基因过度表达.
- 优化发酵条件使用摇瓶和料批发发酵.
- 对生产标位,溶解度,葡萄糖化和抗氧化活性进行分析.
主要成果:
- 在摇瓶中达到230毫克L-1,在料批发发酵中达到1450毫克L-1.
- 食批量标位代表了任何C50类胡卜素的最高报告值.
- 与其非葡萄糖化形式相比,葡萄糖化脱素呈现出更高的抗氧化活性.
结论:
- 可有效地设计C. glutamicum用于高度生产C50胡卜素脱素.
- 葡萄糖化增强了dekaprenoxanthin的抗氧化潜力.
- 这项研究为工业应用提供了从微生物发酵中获取罕见的C50胡卜素的基础.
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