同质线性C-lignin的生物转化为多基甲酸
Zhi-Min Zhao1,2, Xianzhi Meng2, Yunqiao Pu3
1Key Laboratory of Ecology and Resource Use of the Mongolian Plateau (Ministry of Education), School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
Biomacromolecules
|August 9, 2023
概括
这项研究表明,特定的木质素结构,特别是那些具有非乙烯化甲基醇单元和较低分子量的结构,被Pseudomonas putida KT2440.有效地转化为多氧酸盐 (PHA).
科学领域:
- 生物技术是生物技术.
- 微生物工程 微生物工程
- 聚合物科学 聚合物科学
背景情况:
- 复杂的生物聚合物是可持续化学生产的潜在原料.
- 之前的研究主要集中在其他类型的素的转化上,使基素 (C-素) 的生物转化在很大程度上未被探索.
- 了解素结构与性质的关系对于优化生物转化过程至关重要.
研究的目的:
- 首次研究同质线性甲基烯酸 (C-烯酸) 转化为多基酸 (PHA) 的生物转化.
- 分析C-素分子结构对微生物转化效率的影响.
- 为了确定最佳的C-细素特征,以提高PHA的产生.
主要方法:
- 使用了三种类型的C-lignins,这些C-lignins来自香草,euphorbia和花种子外层 (C1,C2,C3),具有不同的分子结构.
- 用于*Pseudomonas putida* KT2440的微生物发酵和生物转化C-素.
- 分析了C-lignins的分子量分布,乙化程度和基含量.
- 量化微生物细胞生长 (CFU/mL) 和PHA度 (mg/L).
主要成果:
- 在C1和C2基因中,非化catechol单元被*P. putida* KT2440.有效消耗.
- 具有较低的重量平均分子量 (26.7%低于C1) 的C2红素,表现出优异的生物转化性能.
- 最大 *P. putida* KT2440 细胞密度在C2介质中达到9.3 × 10^7 CFU/mL,明显高于C1和C3.
- 在C2介质中,PHA度达到137 mg/L的峰值,C1和C3的表现分别为41.2%和149.1%.
结论:
- 在C-lignin中存在的非乙烯化甲基醇结构和低分子量显著有利于其微生物转化.
- * 伪虫 putida* KT2440 能够有效地将特定的 C- 线素结构转化为有价值的多基酸盐.
- 优化C-素原料特性是提高PHA生产产量的关键.
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