在Bacillus licheniformis中识别一种新的乳糖特异性PTS操作子,并开发衍生人工操作子模块
Siyu Li1,2,3, Hehe He1,2,3, Yupeng Zhang1,2,3
1Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, People's Republic of China.
Journal of agricultural and food chemistry
|November 6, 2023
概括
研究人员在Bacillus licheniformis中发现了一种新的乳糖操作子 (lacDCAB),增强了它的乳糖代谢. 工程模块显著提高了乳糖消耗,并使多个碳来源的有效共同利用成为可能.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 代谢工程是代谢工程.
背景情况:
- 细菌菌在食品工业和作为潜在的益生菌中至关重要.
- 它使用乳糖作为碳源的能力是显著的,但人们对其了解甚少.
- 在B. licheniformis中使用乳糖的特定代谢途径需要阐明.
研究的目的:
- 确定和描述B. licheniformis.中的乳糖利用途径.
- 为了设计增强乳糖消耗模块.
- 开发一种混合碳来源的高效共同利用模型.
主要方法:
- 鉴定了一种新的乳糖特异性操作子 (lacDCAB),包括lacD和lacCAB基因.
- 构建和评估乳糖运输和触媒模块的阵列库.
- 开发一种双碳来源运输模型.
主要成果:
- 一种新的乳糖特异性操作子,lacDCAB,被确定,其中包括一个GH4-6--β-galactosidase (lacD) 和一个乳糖特异性的PTS1系统 (lacCAB).
- 工程模块 PDS-lacD-P2-pts1 实现了比对照组高出 8 倍的特定乳糖消耗率.
- 一个双碳源运输模型证明了各种碳源组合的高效联合利用.
结论:
- 这项研究阐明了B. licheniformis. 的乳糖特异性代谢途径.
- 工程模块为显著提高乳糖利用效率提供了一个有希望的策略.
- 这些发现支持在微生物应用中改进混合碳源的共同利用.
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