来自生物质糖的12-氨基多德卡诺酸的生物合成
Haixin Gao1, Qiang Fang1, Yanfen Bai1
1CAS Key Laboratory of Quantitative Engineering Biology, Center for Synthetic Biochemistry, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 518055, China.
Metabolic engineering
|February 25, 2025
概括
这项研究设计了一种微生物过程,从糖中产生可持续的尼龙12前体12-氨基多德卡诺酸 (ADDA). 新方法克服了细胞毒性和副产品问题,实现了生物基ADDA的创纪录产量.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 聚合物科学 聚合物科学
背景情况:
- 尼龙12的生产依赖于石化产品,激励可持续的替代品.
- 从生物质糖中直接生物合成12-氨基甲酸 (ADDA),为尼龙12提供了更绿色的途径.
- 目前的ADDA生物合成受到 dodecanoic acid (DDA) 细胞毒性和 dodecanedioic acid (DDDA) 副产品积累的限制.
研究的目的:
- 开发一种可持续的,单步微生物发酵,直接从糖中生产ADDA.
- 为了设计一个微生物宿主来克服DDA细胞毒性并最大限度地减少DDDA的形成.
- 为生物基ADDA合成建立一个高度和高产率的工艺.
主要方法:
- 设计了一种可自诱导的系统,用于控制体内DDA合成,减轻细胞毒性.
- 删除了特定的化物脱酶和氧化酶,以减少过氧化DDDA副产品的积累.
- 开发了一步发酵工艺,使用葡萄糖和纤维素作为原料.
主要成果:
- 在批发发酵中达到ADDA1035 mg/L的标位.
- 从糖直接生产ADDA的产量达到了5%.
- 确定了迄今为止最高的糖到ADDA转换量和产量.
结论:
- 工程微生物菌株和发酵过程成功实现了从生物质衍生糖中可持续的ADDA生物合成.
- 这项工作提供了对微生物DDA,ADDA和DDDA合成途径的机制性见解.
- 这些发现推动了尼龙12生产的生物基路线的开发,为循环经济做出了贡献.
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