为什么要使用Antiholins? 热力学和动力学论证来解释菌体细胞溶解的稳定性
Anupam Mondal1,2, Anatoly B Kolomeisky1,2,3
1Center for Theoretical Biological Physics, Rice University, Houston, Texas 77005, United States.
The journal of physical chemistry letters
|March 12, 2025
概括
抗霍林蛋白稳定病毒细胞溶解,通过缓冲霍林二分化来应对环境波动. 这确保了强大的细菌细胞破坏,尽管条件不断变化.
科学领域:
- 微生物学 微生物学
- 生物物理学的生物物理.
背景情况:
- 细胞溶解是病毒破坏细菌细胞的关键过程.
- 霍林蛋白调解了溶解的膜通透,但也产生了抑制这种过程的抗霍林蛋白.
- 抗霍林的确切功能尚不清楚.
研究的目的:
- 提出和研究抗霍林在细胞溶解中的新理论作用.
- 假设抗霍林-霍林相互作用在波动的条件下增强溶解强度.
- 为了建模抗霍林-霍林相互作用的热力学和运动性质.
主要方法:
- 开发了一个最小的理论模型,比较两种状态 (没有antiholins) 和三种状态 (带有antiholins) 的系统.
- 研究了温度和相互作用能量的对霍林二元化的影响.
- 分析了溶解概率和速率的变化.
主要成果:
- 没有抗荷林,温度升高会减少荷林二分化,降低溶解概率和速率.
- 抗霍林消除了温度波动对霍林二元化产生负面影响.
- 抗荷林的存在增加了溶解的概率和速率,缓冲环境变化.
结论:
- 抗霍林在病毒细胞溶解中起到稳定元素的作用.
- 抗霍林-霍林相互作用在波动的生理条件下确保了强大的溶解.
- 这为抗霍林蛋白的产生提供了功能性解释.
相关概念视频
Lytic Cycle of Bacteriophages
70.1K
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...
70.1K
Lysogenic Cycle of Bacteriophages
61.7K
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...
61.7K
CRISPR and crRNAs
16.4K
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...
16.4K
Antimicrobial Proteins
852
Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
852
Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.4K


