利用CO2固定和减少功率回收,用于增强型聚酸酸的工业生物生产
Jing Feng1, Xueshan Li2, Xin Teng1
1Bluepha Co. Ltd., Shanghai, China.
Metabolic engineering
|May 3, 2025
概括
在Cupriavidus necator中激活卡尔文-本森-巴沙姆 (CBB) 循环,可回收棕油的多余降解功率,改善新陈代谢平衡,并提高聚酸 (PHA) 生物生产效率.
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:
- 棕油是生物生产的成本高效原料,但会导致氧化还原失衡.
- 在棕油新陈代谢过程中产生的过量减少功率阻碍了工业发酵中的代谢效率.
- 在使用棕油时,多基酸盐 (PHA) 生物生产受到氧化还原失衡的限制.
研究的目的:
- 用棕油改造Cupriavidus necator,用于使用棕油进行增强的PHA生物生产.
- 通过激活卡尔文-本森-巴什姆 (CBB) 循环来解决氧化还原失衡.
- 优化CBB循环激活,以提高代谢效率和PHA产量.
主要方法:
- 基于模型的方法,集成流量平衡分析 (FBA) 用于计算模拟.
- 通过激活卡尔文-本森-巴什姆 (CBB) 循环来设计Cupriavidus necator.
- 基板规模 (2升) 和工业规模 (15m3) 发酵以验证发现.
主要成果:
- 计算模拟预测了CBB激活的增强CO2固定和生物质生成.
- 在基准尺度上优化CBB激活产生了高达21%的生物质增加和25%的PHA产量增加.
- 工业规模的发酵表明,在工程菌株中,PHA产量高出20%.
- 机制研究证实,减少电力回收和碳再分配是关键机制.
结论:
- 激活CBB循环是一种可行的策略,可以回收剩余的降低功率并恢复代谢平衡.
- 精确调整CBB激活强度对于最大限度地提高生物生产效率至关重要.
- 这种方法提供了一种可扩展和强大的方法来增强棕油PHA生物生产.
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