用不同的微生物对聚-3-基酸盐生产进行分析,使用动态模拟来评估经济潜力方法
Willians de Oliveira Santos1, Rafael David de Oliveira2, José Gregório Cabrera Gomez3
1Department of Chemical Engineering Polytechnic School, University of São Paulo, Av. Prof. Lineu Prestes, 580, São Paulo 05508-220, Brazil.
ACS omega
|July 14, 2025
概括
这项研究引入了经济潜力评估动态模拟 (DySEEP) 以优化生物塑料生产,如聚-3-基酸盐 (PHB). DySEEP平衡了生物质和产品形成,确定了提高生物过程产量和利能力的最佳策略.
科学领域:
- 生物技术和代谢工程 生物技术和代谢工程
- 可持续的生物处理.
- 合成生物学 合成生物学
背景情况:
- 越来越多的环境问题促使人们对可生物降解的生物塑料如聚3-基酸盐 (PHB) 感兴趣,作为传统塑料的替代品.
- 高昂的生产成本和产量-生物质权衡阻碍了PHB的工业可行性.
- 生物工艺的优化对于提高产品产量和经济可行性至关重要.
研究的目的:
- 介绍经济潜力评估动态模拟 (DySEEP),一种新的方法,将动态流量平衡分析 (DFBA) 与经济指标相结合.
- 分析和优化复合微生物菌株中PHB的产生,考虑到生物质和产品形成之间的权衡.
- 确定特定的代谢工程目标和生物反应器运行策略,以提高PHB生产.
主要方法:
- 实现动态流量平衡分析 (DFBA) 以模拟随时间推移的细胞代谢.
- 在DFBA框架内整合经济指标,以评估生物工艺的经济潜力.
- 对工程微生物宿主中聚-3-基酸盐 (PHB) 生产的案例研究分析,包括与生长相关的和与生长无关的生产模式.
主要成果:
- DySEEP成功地突出了生物质和PHB形成之间的权衡,这对细胞内代谢物至关重要.
- 对于与增长相关的PHB生产,以0.37g/g的收益率实现了正现金流,最高理论利为0.50g/g.
- 确定了代谢工程的潜在遗传标,包括特定途径的淘汰/降低调节 (例如,酸途径,酸盐生产,TCA循环).
- 对于非增长相关的生产,确定了最佳的葡萄糖利用策略,以实现正现金流 (60%的生产阶段) 和最大利 (80%的生产阶段).
结论:
- 通过平衡代谢目标,DySEEP为优化生物过程经济提供了有价值的框架.
- 该研究为代谢工程策略和生物反应器运行提供了可操作的见解,以提高PHB产量和利能力.
- 这些发现有助于开发可持续和经济可行的生物塑料生产方法.
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