相关实验视频
Updated: May 17, 2025

13:00
Engineering Antiviral Agents via Surface Plasmon Resonance
Published on: June 14, 2022
2.2K
SARS-CoV-2 RBM 突变 N501Y 和 E484K 对 ACE2 结合的影响:一项综合计算和实验研究
Agnieszka Rombel-Bryzek1, Peicho Petkov2, Elena Lilkova3
1Institute of Medical Sciences, University of Opole, 45-052 Opole, Poland.
International journal of molecular sciences
|May 14, 2025
概括
突变N501Y和E484K显著增加了SARS-CoV-2与人类ACE2受体的结合. 结合起来,像Beta/Gamma这样的变体中的这些突变显示出最强的结合,影响病毒的传播能力和免疫逃脱.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 生物物理学的生物物理.
背景情况:
- SARS-CoV-2尖端蛋白的受体结合动机通过人类的ACE2受体介导病毒进入.
- 突变N501Y和E484K在SARS-CoV-2变种中普遍存在,影响了传播能力和免疫逃避.
- 现有的关于这些突变的结合作用的实验数据是不一致的.
研究的目的:
- 通过实验和计算分析N501Y和E484K突变对SARS-CoV-2尖端蛋白结合ACE2的热力学和结构影响.
- 阐明结合机制,量化与个体和组合突变相关的亲和力变化.
主要方法:
- 使用异热定位热量计 (ITC) 来测量结合亲和力和热力学.
- 用分子动力学 (MD) 模拟来研究结构变化和结合位置.
- 应用了卷积神经网络 (CNN) 来估计结合的自由能量.
主要成果:
- N501Y突变增加了ACE2亲和力2.2倍,而E484K增强了结合的5.8倍.
- 结合N501Y和E484K突变 (Beta/Gamma变异) 导致ACE2结合亲和力增加了15倍.
- 结合E484K是由驱动的,而N501Y则涉及由驱动的效应,与疏水相互作用和构造变化相关联.
结论:
- N501Y和E484K突变大大增强了SARS-CoV-2与ACE2的结合,结合时具有协同效应.
- 这些发现为SARS-CoV-2变种的演变提供了关键的见解,并为开发有针对性的治疗策略提供了信息.
相关概念视频
Cross-reactivity
30.9K
Overview
30.9K
Viral Mutations
32.1K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
32.1K
Leaky Scanning
5.0K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.0K
Single Nucleotide Polymorphisms-SNPs
13.7K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
13.7K
Rab Proteins
3.8K
Rab proteins constitute the largest family of monomeric GTPases, of which 70 members are present in humans. Rab proteins and their effectors regulate consecutive stages of vesicle transport such as vesicle transport, docking, and fusion to the correct recipient membrane.
Rab proteins switch between a cytosolic, GDP-bound inactive state and a membrane-anchored, GTP-bound active state. By themselves, Rabs show slow rates of GDP/GTP exchange and GTP hydrolysis. Thus, Rab proteins are considered...
Rab proteins switch between a cytosolic, GDP-bound inactive state and a membrane-anchored, GTP-bound active state. By themselves, Rabs show slow rates of GDP/GTP exchange and GTP hydrolysis. Thus, Rab proteins are considered...
3.8K
Rous Sarcoma Virus (RSV) and Cancer
4.9K
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
4.9K

