在葡萄糖条件下,LipR作为Bacillus thuringiensis中的细胞内pH调节剂
Xia Cai1,2, Jiaxin Qin1, Xuelian Li1
1Department of Microbiology, College of Life Sciences Nankai University Tianjin China.
mLife
|May 31, 2024
概括
细菌 thuringiensis 使用LipR调节器在葡萄糖压力期间管理细胞内pH值. 利普R控制基因表达,防止因葡萄糖过多而导致的生长停止.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 细菌生长取决于细胞内pH值,但过多的葡萄糖可以降低它.
- 甲杆菌可以处理葡萄糖压力,但机制尚不清楚.
研究的目的:
- 在葡萄糖压力下确定Bacillus thuringiensis细胞内pH值的调节剂.
- 阐明LipR转录因子的功能和调节网络.
主要方法:
- 电泳运动移动性转移试验 (EMSA)
- DNase-I 足迹测定方法
- 有关RNA测序的RNA测序
- 基因删除和基因表达分析.
主要成果:
- 在暴露于葡萄糖的B. thuringiensis中,LipR充当细胞内pH调节剂.
- lipR 缺失导致细胞内pH值快速下降和生长停止.
- 利普R直接抑制了 gapN 基因,这是一个关键的糖解酶.
- Ni2+是LipR的一个潜在的效应因子.
- LipR表达是由YhfH,CcpA和AbrB共同调节的.
结论:
- 在B. thuringiensis的葡萄糖压力期间,LipR对于维持细胞内pH稳态至关重要.
- 在压力条件下,LipR平衡葡萄糖代谢和细菌生长.
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