相关实验视频
Updated: May 9, 2025

13:00
Engineering Antiviral Agents via Surface Plasmon Resonance
Published on: June 14, 2022
2.2K
在SARS-CoV-2中Spike蛋白位519的进化促进了对人类的适应
C Cereghino1,2, K Michalak3, S DiGiuseppe3
1Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA, USA.
Npj viruses
|April 28, 2025
概括
研究人员确定了SARS-CoV-2尖端蛋白 (H519) 中的一个关键突变,该突变增强了人类的病毒适应性和ACE2结合. 这一发现为SARS-CoV-2的出现和潜在的抗病毒药物点提供了洞察力.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 了解SARS-CoV-2的出现和适应对于疫情控制至关重要.
- 驱动病毒适应性的关键突变的实验验证是有限的.
- 识别参与宿主适应的特定残留物可以为抗病毒开发提供信息.
研究的目的:
- 识别和实验验证对SARS-CoV-2出现和人类适应至关重要的残留物.
- 调查斯派克蛋白残留519在病毒适应性和宿主受体结合中的作用.
- 探索斯派克残留物519作为药物点的潜力.
主要方法:
- 基因组分析以确定在SARS-CoV-2中选择中的独特残留物.
- 局部导向的突变发生,以产生尖蛋白变体 (H519N).
- 使用人类肺细胞,伪型病毒和ELISA测试进行实验验证.
- 结构分析以了解残留物519在Spike-ACE2相互作用中的作用.
主要成果:
- 在Spike蛋白中的519位置确定了一个独特的残留物,在人类的SARS-CoV-2中是histidine (H519),在蝙蝠/松鼠冠状病毒中是asparagine (N519).
- 替代H519N减少了人类肺细胞中的病毒复制,表明H519增强了健康.
- 与N519相比,H519显著增强了与人类ACE2受体的Spike结合亲和力和伪型病毒感染力,而N519则显著增强了与ACE2受体的Spike结合亲和力.
结论:
- 斯派克残留519的进化过渡对于SARS-CoV-2的出现和人类的适应至关重要.
- 位于519位置的西斯蒂丁通过改善ACE2结合和感染性来增强病毒适应性.
- 尖残留物519代表了新型抗病毒疗法的潜在目标.
更多相关视频
相关概念视频
Viral Mutations
32.0K
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...
32.0K
Single Nucleotide Polymorphisms-SNPs
13.6K
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,...
13.6K
Conjugated Proteins
18.1K
Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
18.1K
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
Conserved Binding Sites
4.1K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
4.1K
Conservation of Protein Domains Over Different Proteins
10.6K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
10.6K

