工程Pseudomonas chlororaphisHT66用于生物合成含有3-基酸盐和中长链3-基甲酸盐的共聚物
Ru-Xiang Deng1, Hui-Ling Li1, Wei Wang1
1State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
Journal of agricultural and food chemistry
|April 2, 2024
概括
这项研究利用*Pseudomonas chlororaphis*产生聚酸酸盐 (PHAs),是一种可生物降解的塑料替代品. 这种新品种有效合成了短链和中链 (scl-co-mcl) PHA,显示了工业应用的潜力.
科学领域:
- 生物技术是生物技术.
- 聚合物科学 聚合物科学
- 微生物工程 微生物工程
背景情况:
- 聚酸酸 (PHAs) 是可生物降解的聚合物,为石油基塑料提供可持续的替代品.
- 控制PHA单体组成对于定制材料特性至关重要.
- Pseudomonas chlororaphis 是一种具有生物聚合物生产潜力的细菌.
研究的目的:
- 开发一个微生物平台,用于可控制的短链-co-中链-长度 (scl-co-mcl) 聚酸酸盐 (PHAs) 的生物合成.
- 为了设计*Pseudomonas chlororaphis*以高效地生产PHA,使用量身定制的单体化合物.
- 为了研究工程PHA合成的工业应用的P. 罗拉菲斯.
主要方法:
- 通过删除关键代谢途径基因,对*Pseudomonas chlororaphis* HT66进行基因工程.
- 乙酸乙-CoA减少酶 (*phaB*) 和宽基质PHA合成酶 (*phaC*) 基因的异构表达.
- 优化发酵条件,包括碳源 (葡萄糖) 和辅基质 (多德卡诺酸) 度.
主要成果:
- 一种P. chlororaphis*的底盘菌株通过基因删除成功地被开发出来.
- 工程菌株HT11Δ::*phaCB*产生了高产量 (60.1重 %) 和高生产率 (14.2g/L) 的scl-co-mcl PHA.
- 通过调整葡萄糖和多德卡诺酸水平,scl-co-mcl PHA的单体成分得到了有效调节.
结论:
- 伪化 (Pseudomonas chlororaphis) 作为一种可行的平台,用于工业生产scl-co-mcl PHAs.
- 这种工程菌株显示出可持续生物塑料制造的巨大潜力.
- 代谢工程策略可以精确控制PHA生物合成和成分.
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