通过表面显示开发高效的 cis-epoxysuccinic 酸酸酶的全细胞催化剂
Rui Zhou1, Sheng Dong2,3,4,5, Yingang Feng2,3,4,5
1Department of Bioscience and Bioengineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Beijing, 100083, China.
Bioresources and bioprocessing
|April 22, 2024
概括
我们使用在大肠杆菌表面显示的细菌cis-epoxysuccinic酸化酶 (CESHs) 设计了用于L(+) -酸生产的全细胞催化剂. 这克服了细胞透性问题,增强了工业应用.
科学领域:
- 生物技术是生物技术.
- 酶工程是什么? 酶工程是什么?
- 工业微生物学 工业微生物学
背景情况:
- 细菌的cis-epoxysuccinic酸酸酶 (CESHs) 是细胞内酶,对于酸生产至关重要.
- 由于纯化酶的不稳定性,更喜欢全细胞催化剂,但细胞透性较低.
- 开发高效的表面显示系统是克服这些局限性的关键.
研究的目的:
- 通过在细菌细胞表面显示CESH[L]来开发改进的全细胞催化剂,用于L(+) - 酸的生产.
- 在大肠杆菌中选和优化表面显示系统,以提高CESH[L]活动.
- 为了解决细胞内CESH催化剂的细胞透性缺陷.
主要方法:
- 在大肠杆菌中选了五种不同的 anchoring motif,用于CESH[L]表面显示.
- 为最有效的系统优化生产条件,InaPbN-CESH[L].
- 研究一种成熟阶段,以进一步增强全细胞酶活性.
主要成果:
- 与其他测试系统相比,InaPbN-CESH[L]系统表现出明显更高的全细胞酶活性.
- 优化生产和发现的成熟阶段增加了整个细胞的活动数倍.
- 表面显示系统实现了比细胞内过度表达系统更高的总活性,并显示出良好的稳定性和可重复使用性.
结论:
- 使用表面显示技术成功开发了一种高效的全细胞CESH[L]生物催化剂.
- 该系统克服了细胞透性障碍,为工业L(+) -酸生产提供了有价值的替代方案.
- 工程生物催化剂具有实用优势,包括储存稳定性和可重复使用性.
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