在Rhodococcus erythropolis感染菌体WC1期间的转录动态
Dana L Willner1, Sudip Paudel2,3, Andrew D Halleran2,4
1Data Science Program, William & Mary, Williamsburg, VA, USA.
BMC microbiology
|April 2, 2024
概括
这项研究揭示了Rhodococcus erythopolis菌体WC1如何操纵宿主基因表达以产生病毒. 菌体WC1控制宿主新陈代谢,并保持调节机制,有助于生物修复和生物合成应用.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- Rhodococcus属的成员,Actinobacteria,在各种环境中发现,并以生物修复和生物合成而闻名.
- 虽然大多数Rhodococcus是非致病的,但有些人会引起疾病;超过100个菌体感染了这个属.
- 在感染期间,人们对 Rhodococcus 菌体和它们的主体之间的分子遗传相互作用知之甚少.
研究的目的:
- 为了研究 Rhodococcus erythopolis 菌体 WC1 与其宿主之间的分子遗传相互作用.
- 在整个感染过程中使用RNA-Seq.分析菌体和宿主转录组.
主要方法:
- 对于 Rhodococcus erythopolis 和菌体 WC1.1 的RNA测序 (RNA-Seq) 分析.
- 在感染后的多个时间点 (5,30和60分钟) 进行转录组分析.
主要成果:
- 早期感染 (5分钟):对菌体外核酶,抑制剂和抗限制蛋白的升高调节;宿主升高调节DNA复制和修复基因.
- 感染中期 (30分钟):菌体DNA合成基因上调;宿主显示翻译机制增加和代谢途径下调.
- 晚期感染 (60分钟):菌体结构基因上调;宿主表现出破坏金属离子稳态和基因表达的下降,这表明菌体控制病毒的产生.
结论:
- 了解 Rhodococcus 中的菌体与宿主相互作用对于它们的生态作用和生物技术应用至关重要.
- 详细的基因表达研究有助于识别用于增强Rhodococcus生物修复,生物合成和病原体控制能力的基因.
- 菌体WC1似乎可以选择性地控制宿主调节机制,以优化病毒产量.
相关概念视频
Lysogenic Cycle of Bacteriophages
62.1K
In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
62.1K
Lytic Cycle of Bacteriophages
70.7K
Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...
70.7K
Bacterial RNA Polymerase
29.5K
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...
29.5K
Transcription Initiation
16.4K
Initiation is the first step of transcription in eukaryotes. Prokaryotic RNA Polymerase (RNAP) can bind to the template DNA and start transcribing. On the other hand, transcription in eukaryotes requires additional proteins, called transcription factors, to first bind to the promoter region in the DNA template. This binding helps recruit the specific RNAP that can assemble on the DNA and start transcription.
The promoters and enhancers and their accessory proteins allow tight regulation of...
The promoters and enhancers and their accessory proteins allow tight regulation of...
16.4K


