细胞分裂调节蛋白MinC的C端域足以与MinD形成共聚合物
Na Wang1, Haiyu Sun1, Kairui Zhao2
1Key Laboratory of Resources Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xi'an, China.
The FEBS journal
|June 17, 2023
概括
Pseudomonas aeruginosa 中的 MinC (MinCC) 的 C 终端域可以与 MinD 共聚合,形成与 FtsZ 结合的捆绑. 虽然这有助于细菌细胞分裂,但单独的MinC不足以促进正常生长.
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:
- 细菌细胞分裂依赖于FtsZ蛋白组装成一个Z环.
- 包括MinC和MinD在内的Min蛋白调节Z环的位置.
- MinC抑制了FtsZ的组装;它的C端域 (MinCC) 与MinD和FtsZ相互作用.
研究的目的:
- 为了研究来自Pseudomonas aeruginosa的MinC-MinD的组装特性.
- 为了确定MinCC是否足以进行MinC-MinD共聚合.
- 评估MinCC-MinD与FtsZ原纤维的结合及其对细胞分裂的影响.
主要方法:
- 在体外组装测定MinCC和MinD蛋白质.
- 动态光散射和显微镜用于分析共聚合和束形成.
- FtsZ原细丝结合试验. 试验结果.
- 用MinCC补充的minC-knockout菌株中细胞分裂缺陷的分析.
主要成果:
- MinCC足以进行MinC-MinD共聚合,形成更大的束.
- 同聚合动力学由MinD度主导,临界度约为3μm.
- MinCC-MinD快速结合FtsZ原纤维,证实了MinCC与FtsZ的直接相互作用.
结论:
- MinCC-MinD共聚合对于调节Z环形成至关重要.
- 部长与FtsZ的互动至关重要,但它本身无法完全挽救部门的缺陷.
- MinD度是MinCC-MinD共聚合和细菌分裂的关键因素.
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