由Pseudomonas putida通过糖的气味2-乙醇的生物合成
Patricia Godoy1, Zulema Udaondo2, Estrella Duque1
1Department of Environmental Protection, Estación Experimental del Zaidín, CSIC, c/ Profesor Albareda 1, 1808, Granada, Spain.
Biotechnology for biofuels and bioproducts
|April 2, 2024
概括
这项研究通过优化L-phenylalanine水平,通过使用Pseudomonas putida DOT-T1E增强2-phenylethanol (2-PE) 产量. 工程菌株从农业废物中获得了更高的产量,为石化品提供了可持续的替代品.
科学领域:
- 微生物生物技术 微生物生物技术
- 合成生物学 合成生物学
- 生物化学工程是生物化学工程.
背景情况:
- 石化产品带来了环境挑战;微生物生物炼油厂提供了可持续的解决方案.
- 伪虫DOT-T1E是一种强大的宿主,可以产生有价值的芳香化合物,如L-氨酸和2-乙醇 (2-PE).
研究的目的:
- 为了增强工程化Pseudomonas putida DOT-T1E菌株中的二乙醇 (2-PE) 生产.
- 为了识别和克服L-phenylalanine转化为2-PE的转化途径中的局限性.
- 评估使用农业工业废物作为碳源的可行性.
主要方法:
- 工程L-氨酸过度产生的菌株 (CM12-5,CM12-5Δgcd) 用埃里希路径基因进行了转换.
- 引入了反耐 chorismate 突变酶/甲酸脱水酶,以提高 L-phenylalanine 的水平.
- 进行了随机突变和优化农业废物基质的优化.
主要成果:
- 使用葡萄糖 (50-60 ppm) 的2-PE产量明显高于使用西洛斯 (<3 ppm).
- 细胞内L-phenylalanine被确定为一个限制因素,工程菌株达到100-120ppm的2-PE.
- 使用3%的农业废弃物基质,特别是富含葡萄糖的基质,可以获得最佳的2-PE产量 (82-100 ppm).
结论:
- 提高L-氨生产的策略有效地增加了下游芳香化合物合成.
- P. putida DOT-T1E 在利用各种碳来源和耐受工业废物组件方面表现出多功能性.
- 工程菌株显示出从农业工业废物中可持续生产2-PE的高效微生物平台的潜力.
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