多层次的Bacillus licheniformis系统工程,以有效地从林氏纤维素解酸盐中生产乙
Pan Zhu1, Chen Zhang2, Jiaying Chen1
1School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China.
International journal of biological macromolecules
|August 29, 2024
概括
这项研究设计了Bacillus licheniformis以有效地从林氏纤维素生物质中产生乙. 工程细菌从混合糖和基纤维素解酸盐中获得了高产量,证明了可持续化学生产的潜力.
科学领域:
- 生物技术是生物技术.
- 合成生物学 合成生物学
- 工业微生物学 工业微生物学
背景情况:
- 红纤维素生物质是生物燃料和生物化学品的可持续资源.
- 糖 (糖和葡萄糖) 的有效联合利用仍然是纤维素生物提炼的挑战.
- 乙是一种有价值的化学物质,具有多种工业应用.
研究的目的:
- 为了设计Bacillus licheniformis作为一个高效的细胞工厂,从纤维纤维素资源生产乙.
- 为了增强B. licheniformis. 的氨酸生产和耐受性.
- 改善糖和糖的共用,以增加乙的产量.
主要方法:
- 适应性进化以提高对乙素的耐受性.
- 突变发生 (ARTP和60Co-γ辐射) 用于改进菌株.
- 代谢工程是为了重新连接克西洛斯吸收和利用途径.
- 使用林氏纤维素解酸盐进行料批发发酵.
主要成果:
- 通过适应性进化,乙的耐受性增加了19.6%.
- 从使用突变发生的葡萄糖中,乙的产量达到73.0g/L.
- 工程菌株从葡萄糖和树脂糖混合物中产生了60.6g/L的乙.
- 最高的乙胺标位为68.3g/L,来自基纤维素解酸盐.
结论:
- 改造的Bacillus licheniformis证明了从细胞菌生物质中生产乙的高效率.
- 开发的菌株表现出混合糖的强有力的联合利用和耐受性对林氏纤维素抑制剂.
- 这一战略显示了可持续和成本效益高的生物提炼厂的巨大潜力,可将纤维素转化为高价值化学品.
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