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压力控制器:适应性实验室进化的新方法,以提高最终产品的抗性

Sylviani Hartono¹, Marlisa F A Meijerink¹, Tjakko Abee¹

¹Food Microbiology, Wageningen University & Research, P.O. Box 17, 6700AA Wageningen, the Netherlands.

New biotechnology

|October 25, 2023

概括

开发了一种名为stressostat (基质剩余中的压力抵抗进化) 的新方法,以提高细菌对最终产品的耐药性. 这种技术成功地增强了Lactococcus lactis的乳酸盐耐药性,从而增加了生物质生产.

科学领域:

生物技术是生物技术.
微生物生理学微生物生理学
进化生物学进化生物学

背景情况:

最终产品抑制限制了工业过程中的细菌生物质生产.
现有的适应性实验室进化 (ALE) 方法无法有效地选择改善最终产品耐药性.

研究的目的:

开发一种新的连续ALE方法,压力控制器,用于选择具有增强最终产品耐药性的微生物.
为了改善乳糖耐药性的乳球菌乳酸菌FM03P.

主要方法:

开发并应用了压力控制培养方法,在基质余下应用恒定的最终产品 (乳酸盐) 度.
在35天的压力控制培养后,隔离和鉴定了34种Lactococcus lactis变种.
在不同的乳酸盐度和pH控制条件下评估变体生长和生物质生产.

主要成果:

压力培养成功地将乳酸盐度从530至675毫米增加,选择了耐药的乳球菌变种.
大多数孤立变体在高乳酸盐度 (870-928毫米) 中表现出显著的增长,而野生类型被抑制.
与野生类型相比,变种在pH控制的批量种植中显示生物质产量增加,尽管在低乳酸盐环境中存在潜在的权衡.

结论:

压力控制器是一种有价值的方法,可以获得具有更好的最终产品耐药性的微生物变体.
精选的乳球菌乳酸菌变体显示出增强的乳酸耐药性和改善的生物质产量.
需要进一步的研究来了解抵抗机制,并探索工业应用.

关键词:

适应适应适应化学定位器化学定位器牛奶酸是什么牛奶酸是什么乳球球菌 (Lactococcus) 是一种乳球菌.坚固性坚固性创业者的文化是初创者.

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