与Bacillus subtilis中细胞分离相关的自素的特征
Rui Li1, Ronghao Chu1, Rui Ban1
1Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, People's Republic of China.
Journal of bacteriology
|July 16, 2024
概括
LytE和LytC是Bacillus subtilis细胞分离的主要自解酶. 较小的自溶酶CwlS,LytF和LytD也起着作用. 过度表达SinR-SlrR会产生超长的链条,有利于发酵.
科学领域:
- 微生物学 微生物学
- 细胞生物学 细胞生物学
- 生物化学 生化学
背景情况:
- 自律素是糖酸酶,对于细菌细胞分离至关重要.
- 在细菌细菌的细胞分离中,单个自素的具体作用仍然不完全理解.
研究的目的:
- 阐明了自素在细菌细菌细胞分离中的独特作用.
- 研究转录因子SinR和SlrR对细胞链形态学的影响.
- 为潜在的生物技术应用构建一个超长链 *B. subtilis* 菌株.
主要方法:
- 构建和表型分析缺少自解素的B. subtilis*菌株.
- 产生过度表达转录因子SinR和SlrR的菌株.
- 在不同生长阶段对细胞形态的显微观测.
主要成果:
- 缺少LytE或LytC导致细胞在整个生长过程中持续连锁.
- 删除CwlS或LytF主要影响早期指数阶段链长.
- 在LytD缺乏症中,只有细胞分离的轻微缺陷.
- 在一个四重突变 (*cwlS lytF lytC lytE*) 中,SinR-SlrR的过度表达产生了超长链.
结论:
- LytE和LytC是B. subtilis*中及时分离子细胞的主要自素.
- 在细胞分离过程中,CwlS,LytF和LytD作为次要自身素起作用.
- SinR-SlrR复合物通过多种机制抑制细胞分离,包括调节*lytC*和*lytF*表达.
- 构造的超长链菌株在微生物发酵中具有潜在的应用,以改善产品回收.
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