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新的PALM兼容的整合载体用于格兰正型模型细菌Bacillus subtilis
Ipek Altinoglu1, Rut Carballido-Lopez1
1Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France.
Microbiology spectrum
|November 4, 2024
概括
新的等离子体使得Bacillus subtilis的超分辨率成像成为可能. 这些工具可使用光激活局部化显微镜 (PALM) 进行细菌成分和病毒DNA的精确可视化,用于高级研究.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物物理学的生物物理.
背景情况:
- 超分辨率显微镜,包括光激活局部化显微镜 (PALM),提供细胞结构的高分辨率成像.
- 等离子体对于在细菌中产生光蛋白融合是必不可少的,用于分子研究.
- 现有的超分辨率成像工具在Bacillus subtilis是有限的.
研究的目的:
- 为Bacillus subtilis开发新的光激活局部化显微镜 (PALM) 兼容的集成等离子体.
- 在B. subtilis.中创建用于光蛋白融合的多功能克隆载体.
- 为了在这个模型生物体中实现先进的单色和双色PALM研究.
主要方法:
- 构建四个编码可光切换绿色光蛋白 (dronPA) 或可光激活红色光蛋白 (PAmCherry1) 的整合等离子体.
- 结合多个克隆站点以实现灵活的基因融合.
- 通过异胎位 (amyE或thrC) 的同源重组,集成到B. subtilis染色体中.
- 为DNA定位研究生成LacI抑制器融合.
主要成果:
- 成功构建和验证了B. subtilis.的PALM兼容的集成向量.
- 通过使用 LacI-dronPA 和 LacI-PAmCherry1 融合,证明了菌体 SPP1 DNA 的有效光激活和纳米尺度成像.
- 在活体和固定B. subtilis细胞中实现了病毒DNA的精确定位.
结论:
- 开发的集成向量为B. subtilis的PALM研究提供了一个方便和多功能的工作流.
- 这些工具扩大了用于高分辨率成像和分子定位的基因工具箱.
- 这些载体促进了定性和定量,单色和双色PALM分析,推动了细菌细胞生物学研究.
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