通过蛋白质和代谢工程通过使用Corynebacterium glutamicum减少CO2排放来增强异醇的生产
Wu-Young Jeong1, Eunseo In1, Myeong-Eun Lee2
1Department of Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
Metabolic engineering
|May 15, 2025
概括
这项研究利用Corynebacterium glutamicum进行了可持续的异醇 (IPA) 生产,提高了产量2.45倍,并减少了高达30%的二氧化碳排放. 研究重点是为了更绿色的化学工业而专注于蛋白质和代谢工程.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
背景情况:
- 基于石油的异醇 (IPA) 生产带来了环境挑战.
- IPA的微生物生产提供了一个可持续的替代方案.
- 工程微生物对增强IPA合成和减少排放至关重要.
研究的目的:
- 为了改造Corynebacterium glutamicum以改善异醇 (IPA) 的生产.
- 在IPA生物合成过程中减轻二氧化碳 (CO2) 排放.
- 为IPA制造开发一个可持续的微生物平台.
主要方法:
- 二次性酒精脱酶 (SADH) 变体的合理设计,以增强NADH活性.
- 用基因工程改造的Corynebacterium glutamicum带有修饰的SADH和Ncgl1676促销剂.
- 过度表达碳酸 anhydrase (HmCA) 和乙乙烯-CoA合成酶 (nphT7),以利用CO2.
- 用于IPA生产的高细胞密度料批发发酵.
主要成果:
- 工程SADH变种显示NADH氧化增加11.11倍,酶活性增加6.02倍.
- CGIPA-4菌株的IPA产量增加了2.45倍.
- 通过将二氧化碳转化为二氧化碳酸盐,CGIPA-5菌株的二氧化碳排放量减少了21%.
- 与CGIPA-4相比,料批发发酵实现了148.6 ± 3.8g L-1 IPA,减少了30%的CO2排放量.
结论:
- 蛋白质和代谢工程可以显著提高微生物IPA的生产.
- 改造的Corynebacterium glutamicum菌株为IPA合成提供了一个可持续的途径.
- 这种方法为以石化为基础的IPA生产提供了可行的替代方案,减少了对环境的影响.
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