Pseudomonas aeruginosa 调节器 PvrA 与多个伪palindromic 位点同时结合,以便有效地激活转录
Yibo Zhu1,2, Bingnan Luo1, Xingyu Mou1
1Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China.
Science China. Life sciences
|November 8, 2023
概括
伪白病毒毒性调节剂A (PvrA) 结合多个DNA位点来控制基因表达和细菌毒性. 破坏其调节链区域会减少生物膜的形成和皮约素的产生,减轻毒性.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 四环素抑制剂 (TetR) 家庭调节剂 (TFRs) 是细菌和古生物中关键的DNA结合转录因子.
- 来自Pseudomonas aeruginosa的伪虫毒性调节器A (PvrA) 激活了脂肪酸利用和毒性的基因.
研究的目的:
- 阐明DNA结合机制和PvrA功能的结构基础.
- 研究PvrA调控链区域在控制基因表达和细菌毒性方面的作用.
主要方法:
- 电子显微镜 (cryo-EM) 用于PvrA-DNA复合体的结构分析.
- 进行X射线晶体学以确定PvrA结构.
- 在Pseudomonas aeruginosa中对PvrA突变的功能分析.
主要成果:
- PvrA同时结合多个伪palindromic DNA 位点,从而上调目标基因表达.
- 冷电磁检测显示,在PvrA结合时,B-DNA螺旋被扭曲.
- 在PvrA中,一个关键的监管关区域是促进促进者的认可.
- 在链区域的突变差异性影响生物膜形成和皮亚生物合成,减少毒性.
结论:
- 对于基因调节,PvrA采用了一种独特的同时DNA结合机制.
- 在P. aeruginosa.中,PvrA链区域对于其功能和毒性调节至关重要.
- 这些发现增强了对TetR家族结构-功能关系和P. aeruginosa毒性机制的理解.
更多相关视频
08:57Identification of Novel Genes Associated with Alginate Production in Pseudomonas aeruginosa Using Mini-himar1 Mariner Transposon-mediated Mutagenesis
Published on: March 10, 2014
12.4K
07:39Tools for the Real-Time Assessment of a Pseudomonas aeruginosa Infection Model
Published on: April 6, 2021
3.5K
相关概念视频
01:28Gene Regulation in Microbial Communities: Quorum Sensing
23
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
23
01:23The Antiviral System of Bacteria and Archaea: CRISPR
30
CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats is a adaptive immune system found in bacteria and archaea that protects against viral infections. This system enables prokaryotic cells to identify, remember, and neutralize foreign genetic elements, primarily bacteriophages, by storing fragments of the invader’s DNA as a genetic memory.The CRISPR immune response begins during an initial infection. Cas (CRISPR-associated) proteins play a central role in this...
30