通过使用人类ACE2进入SARS-CoV-2的结构和功能基础
Qihui Wang1, Yanfang Zhang2, Lili Wu3
1CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; Shenzhen Key Laboratory of Pathogen and Immunity, Shenzhen Third People's Hospital, Shenzhen 518112, China; CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
Cell
|April 11, 2020
概括
由于关键的残留物变化,SARS-CoV-2的尖端蛋白与人类的ACE2结合得更高. 对SARS-CoV有效的抗体不会与SARS-CoV-2结合,这凸显了病毒的差异.
科学领域:
- 病毒学
- 结构生物学
- 免疫学
背景情况:
- 新型冠状病毒 (SARS-CoV-2) 出现,引起了全球健康的关注.
- ангиотензин转化酶2 (ACE2) 被确定为SARS-CoV-2的入口受体.
- 了解SARS-CoV-2和ACE2之间的相互作用对于治疗开发至关重要.
研究的目的:
- 确定与人类ACE2 (hACE2) 结合的SARS-CoV-2 C终端域 (CTD) 尖端蛋白的晶体结构.
- 阐明SARS-CoV-2与HACE2结合的分子基础,并将其与SARS-CoV进行比较.
- 调查SARS-CoV和SARS-CoV-2尖端蛋白之间的抗原差异.
主要方法:
- 使用X射线结晶学来获得SARS-CoV-2 CTD-hACE2复合物的结构.
- 结构分析侧重于结合界面,以确定关键的相互作用和残留物差异.
- 使用单克隆和多克隆抗体对抗SARS-CoV尖端蛋白进行了抗体结合测试.
主要成果:
- 晶体结构显示了与SARS-CoV相似的HACE2结合模式,但在SARS-CoV-2-CTD中具有关键的残留物替代.
- 与SARS-CoV相比,这些替代物导致SARS-CoV-2与 hACE2的相互作用略强,结合性更高.
- 针对SARS-CoV尖端蛋白/受体结合域 (RBD) 的小鼠抗体与SARS-CoV-2尖端蛋白没有相互作用,这表明其具有明显的抗原性.
结论:
- 结构和结合数据提供了有关SARS-CoV-2增强受体结合的见解.
- 抗原性的差异表明,针对SARS-CoV的现有抗体可能无法对抗SARS-CoV-2.
- 这些发现对于了解病毒病原和制定针对SARS-CoV-2的治疗策略至关重要.
相关概念视频
Conjugated Proteins
26.0K
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...
26.0K
Viral Structure
73.5K
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
73.5K
Structure of Cadherins
4.5K
The cadherins were one of the first cell adhesion molecules discovered; the term “cadherins” is based on their calcium-dependent adhering properties. The first cadherins discovered on the epithelial, neuronal, and placental cells were named E-cadherin, P-cadherin, and N-cadherin, respectively. These classical cadherins share sequence and structural similarities. Other cadherins, including those involved in cell signaling, are grouped into non-classical cadherins. This...
4.5K
Leaky Scanning
5.5K
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...
5.5K
Structural Protein Function
3.1K
3.1K
Structural Protein Function
29.6K
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
29.6K


