用双酶级联生物酶法制备α-谷氨酸
Guoqing You1,2, Jun Cai2,3, Lu Chang1,2
1Anhui University, Hefei, Anhui, 230601, People's Republic of China.
Applied biochemistry and biotechnology
|November 7, 2025
概括
这项研究开发了一种新的全细胞生物制造工艺,用于使用共表达酶的α-谷氨酸 (α-KG). 这种绿色方法实现了高产量,并克服了传统α-KG生产的局限性.
科学领域:
- 生物技术是生物技术.
- 生物化学 生物化学
- 酶工程是什么? 酶工程是什么?
背景情况:
- α-甲酸 (α-KG) 是一种重要的代谢中间体,在各种行业中是有价值的化合物.
- 目前α-KG生产的方法通常依赖于外源性催化酶的添加,这带来了局限性.
- 为α-KG开发高效和可持续的生物制造工艺至关重要.
研究的目的:
- 开发一种全细胞生物催化系统,用于α-甲酸 (α-KG) 生产.
- 在单个微生物中共同表达L-谷氨酸氧化酶 (LGOX) 和催化酶 (CAT).
- 优化表达和固定化技术,以提高α-KG产量.
主要方法:
- 来自Streptomyces ghanaensis的L-谷氨酸氧化酶 (LGOX) 和来自大肠杆菌的酶 (CAT) 的同时表达.
- 优化酶表达水平和整个细胞的催化条件.
- 开发和应用五种不同的固定方法,包括ZIF-8-GA,用于双酶系统.
主要成果:
- 在12小时的全细胞催化过程中,实现了87.97%的单谷氨酸转化和96.77 g/L的α-KG产量.
- 在10个批次中,ZIF-8-GA固定细胞保持了超过80%的催化效率.
- 使用固定细胞证明了88.46%的转化率和79.61 g/L的α-KG产量.
结论:
- 在单个微生物内开发的双酶系统消除了对外源性催化酶的需求.
- 创新的固定化技术可以实现连续,批量和经济高效的α-KG生产.
- 这种方法提供了一种绿色和高效的生物制造解决方案,用于α-甲酸.
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