使用表面等离子体共振进行SARS-CoV-2S-蛋白-Ace2结合分析
Jason Baardsnes1, Béatrice Paul-Roc2
1Quality Attributes and Characterization, Human Health Therapeutics, National Research Council Canada, Montréal, QC, Canada. Jason.Baardsnes@cnrc-nrc.gc.ca.
Methods in molecular biology (Clifton, N.J.)
|February 5, 2024
概括
这项研究详细介绍了一种无标签的表面等离子体共振 (SPR) 方法,用于分析ACE2受体和SARS-CoV-2 S蛋白之间的结合动力学. 该技术能够准确地确定这种关键病毒相互作用的结合亲和力和速率常数.
科学领域:
- 生物化学 生物化学
- 生物物理学的生物物理.
- 免疫学 免疫学 免疫学
背景情况:
- ACE2受体和SARS-CoV-2 S蛋白之间的相互作用对于病毒进入宿主细胞至关重要.
- 了解这种相互作用的结合动力学对于开发治疗干预措施至关重要.
- 无标签技术为研究生物分子相互作用提供了优势,而不需要对分析物进行修改或标记.
研究的目的:
- 描述一种新的表面等离子体共振 (SPR) 方法来分析ACE2-SARS-CoV-2 S蛋白相互作用.
- 为了使这种相互作用的结合亲和力和速率常数能够在没有标签的情况下确定.
- 建立一种方法来对S蛋白的相对活性进行基准测试.
主要方法:
- 使用表面等离子共振 (SPR) 进行无标签分析.
- 使用间接捕获方法将SARS-CoV-2 S蛋白固定在SPR传感器表面上.
- 将单体ACE2流入固定S蛋白上,以测量结合动力学.
主要成果:
- 成功建立了一种方法,用于无标签地确定结合亲和率常数.
- 证明了分析ACE2-SARS-CoV-2 S蛋白相互作用动态的能力.
- 开发了一个使用S蛋白捕获水平和传感器图谱反应进行相对活动基准测试的框架.
结论:
- 描述的SPR方法为表征ACE2-SARS-CoV-2 S蛋白相互作用提供了一个强大的平台.
- 这种技术有助于对结合动学的定量评估,这对于药物发现和开发至关重要.
- 该方法的适应性允许对病毒蛋白活性进行基准测试,有助于了解病毒变异和治疗疗效.
相关概念视频
02:50Conjugated Proteins
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...
01:29Coronavirus
Coronaviruses, including the severe acute respiratory syndrome coronavirus (SARS-CoV), are enveloped viruses characterized by their single-stranded, positive-sense RNA genome and helical nucleocapsid structure. The hallmark of these viruses is their club-shaped spike (S) glycoproteins that protrude from the viral envelope, facilitating attachment to host cells. Typically, coronaviruses infect the upper respiratory tract, often causing mild or asymptomatic disease. However, certain strains like...