神经调节剂作为跨域信号分子,能够占据细菌转录因子中的效应因子结合位
Yuri A Purtov1, Olga N Ozoline1
1Department of Functional Genomics of Prokaryotes, Institute of Cell Biophysics of the Russian Academy of Sciences, Federal Research Center Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Pushchino 142290, Russia.
International journal of molecular sciences
|November 14, 2023
概括
主体激素和神经递质,如上腺素和黑激素,可以直接与细菌转录因子相互作用. 这表明细菌可能会感知并响应宿主信号分子,从而影响它们的适应.
科学领域:
- 微生物学和分子生物学
- 主体与微生物的相互作用
- 生物化学 生物化学
背景情况:
- 细胞荷尔蒙和神经递质是与微生物群体之间跨王国信号传递的关键.
- 虽然对细菌生理学的影响是已知的,但这些分子直接透细菌是最近的发现.
- 这为神经调节器打开了影响细菌连接体依赖调节蛋白的可能性.
研究的目的:
- 为了研究神经递质 (上腺素,多巴胺,上腺素) 和激素 (黑激素,血清激素) 是否可以作为细菌调节蛋白的作用因子.
- 评估神经调节剂与细菌转录因子效应体部位的结合潜力.
主要方法:
- 使用灵活的分子对接模拟.
- 分析的重点是转录因子与联体依赖活性,包括细菌调节器,如CRP和LaCI.
- 三维 (3D) 模型被用来预测结合部位的相互作用.
主要成果:
- 分子对接预测,上腺素,多巴胺,上腺素,黑激素和血清激素可以占据各种细菌转录因子的效应体结合部位.
- 预计这些神经调节剂可能会阻碍或取代结合部位的自然因子,例如CRP和LacI的结合部位.
- 这项研究表明,通过宿主信号分子直接调节细菌转录因子是可行的.
结论:
- 神经调节器可能会直接调节细菌转录因子的活动.
- 主体的天然荷尔蒙背景可能会使细菌预先适应它们的环境,通过使它们能够直接感知主体信号分子.
- 这突显出一种新的宿主微生物通信和细菌适应的机制.
相关概念视频
Gene 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
Bacterial Signaling
32.4K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
32.4K
Bacterial RNA Polymerase
29.6K
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
29.6K
RNA Polymerase II Accessory Proteins
9.2K
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
9.2K
Prokaryotic Transcriptional Activators and Repressors
21.1K
The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the genes for proteins involved in the same biochemical process or function are located together in groups. This group of genes, along with their regulatory elements, are collectively known as an operon. The functional genes in an operon are transcribed together to give a single strand of mRNA known as polycistronic mRNA.
Transcription of prokaryotic...
Transcription of prokaryotic...
21.1K
Master Transcription Regulators
6.9K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.9K


