相关实验视频
Updated: Jul 7, 2025

06:10
Following Cell-fate in E. coli After Infection by Phage Lambda
Published on: October 14, 2011
23.4K
在感染期间,phiKZ细菌体内部的组装
Anna Nichiporenko1, Daria Antonova1, Inna Kurdyumova1
1Peter the Great St. Petersburg Polytechnic University, St. Petersburg, 195251, Russia.
Biochemical and biophysical research communications
|December 21, 2023
概括
巨大的肌瘤病毒phiKZ
科学领域:
- 微生物学和病毒学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 巨型神经病毒phiKZ在其体内具有独特的内体 (IB) 结构,对于高效的DNA包装至关重要.
- IB包括六种phiKZ特异性蛋白质,其中四种被共同注入宿主细胞,这表明它可能在细菌细胞溶解中发挥作用.
- 感染期间在phiKZ囊体内IB的精确组装动态尚不清楚.
研究的目的:
- 阐明巨型肌肉病毒phiKZ生命周期期间内体 (IB) 蛋白质的组装动态.
- 为了确定特定IB蛋白质在发育中的病毒体中的时间内合并.
- 了解phiKZ菌体在其复制周期中的结构组织.
主要方法:
- 在菌体感染过程中利用光显微镜追踪IB蛋白与光蛋白融合的局部化.
- 观察了宿主细胞内IB组件的动态组合和发育中的病毒.
- 分析了菌体形态发生过程中单个IB蛋白的结合时间.
主要成果:
- 发现蛋白质Gp97和Gp162在菌体头成熟阶段被纳入新的病毒头.
- 蛋白质Gp90,Gp93和Gp95似乎在DNA包装开始前不久就被整合到病毒结构中.
- 该研究为 phiKZ 内体的组装提供了一个时间框架.
结论:
- 这些发现揭示了在phiKZ菌体组装过程中不同内体蛋白质的独特时间合并模式.
- 这种不同的时间推测表明,内部身体结构的形成是一个复杂的,有规律的过程.
- 了解这些动态,可以了解巨型细菌菌体的结构生物学和感染机制.
相关概念视频
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
Lysogenic Cycle of Bacteriophages
62.2K
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...
62.2K
Intracellular Movement of Viruses and Bacteria
2.8K
Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
2.8K
CRISPR and crRNAs
17.0K
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
17.0K
What are Viruses?
115.0K
Overview
115.0K
Mechanism of Filopodia Formation
2.3K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
2.3K

