在Aureobasidium pullulans中通过组合ARTP突变发生,双染料选和媒介优化增强β-葡萄糖的产生
Lixing Chen1, Xiaoqian Liu1, Feiyu Sha1
1College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
International journal of biological macromolecules
|November 29, 2025
概括
使用血突变和查开发了Aureobasidium pullulans的一种新突变菌株,显著增加了用于工业应用的β-葡萄糖产量. 优化的发酵条件进一步提高了β-glucan和pullulan的产量.
科学领域:
- 生物技术是生物技术.
- 微生物发酵 微生物发酵
- 食品科学 食品科学 食品科学
背景情况:
- β-葡萄糖是一种有价值的营养药和食品添加剂.
- 目前Aureobasidium pullulans的生产受到低发酵位的限制,这阻碍了工业的可扩展性.
- 应变改善对于高效的β-葡萄糖制造至关重要.
研究的目的:
- 开发一种高产的Aureobasidium pullulans突变菌株,以提高β-葡萄糖的生产.
- 优化发酵条件以最大限度地提高β-葡萄糖和pullulan的产量.
- 阐明突变菌株中改善生产的基础代谢机制.
主要方法:
- 组合大气和室温等离子体 (ARTP) 突变发生与双染色查相结合 (Trypan蓝/刚果红).
- 使用单因子,普莱克特-伯曼和响应表面方法学的系统媒介优化.
- 进行比较性转录组学分析以确定代谢途径的改变.
主要成果:
- 成功开发了一种高产的突变菌株 (No. 7),在使用优化介质的摇瓶中,β-葡萄糖产量增加了25.7% (6.02 g/L).
- 优化的介质还在5L生物反应器中增加了27.0% (39.67g/L) 的普卢兰产量.
- 转录组分析揭示了第7号突变体的显著代谢重编程,包括增强的糖解,TCA循环和细胞壁生物合成途径,以及关键酶 (β-GS,PGM) 的活性增加.
结论:
- 突变者No.7是一个强大的β-葡萄糖和pullulan的工业生产者.
- 突变发生,查和媒介优化的综合策略对于微生物菌株的改善是有效的.
- 了解新陈代谢重编程为进一步增强微生物发酵过程提供了见解.
关键词:
在ARTP的突变发生过程中.乌雷奥巴西迪亚姆 (Aureobasidium Pullulans) 是一个有毒的植物.发酵优化优化发酵的优化文字转录学 (Transcriptomics) 是一个学科.在β-葡萄糖.更多相关视频
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