相关实验视频

Updated: Jun 26, 2025

Engineering Antiviral Agents via Surface Plasmon Resonance

Engineering Antiviral Agents via Surface Plasmon Resonance

Published on: June 14, 2022

结构功能分析显示,SARS-CoV-2 BA.2.86平衡了抗体逃逸和ACE2亲和力

Chang Liu¹, Daming Zhou², Aiste Dijokaite-Guraliuc³

¹Chinese Academy of Medical Science (CAMS) Oxford Institute (COI), University of Oxford, Oxford, UK; Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford, UK.

Cell reports. Medicine

|May 9, 2024

概括

新的SARS-CoV-2变种BA.2.86显示出比XBB.1.5更少的免疫逃避,尽管存在众多突变. 这种变种可能由于更高的ACE2结合亲缘关系而增加了传播能力.

科学领域:

病毒学病毒学
免疫学免疫学免疫学
结构生物学结构生物学

背景情况:

BA.2.86是SARS-CoV-2 Omicron的一个新型亚系,具有广泛的尖基因突变.
它在抗原上与以前占主导地位的XBB变种有所区别.
人们担心它有可能逃离免疫系统并引起新的感染浪潮.

研究的目的:

评估BA.2.86对抗体反应的免疫逃避性质.
将BA.2.86的免疫逃避与XBB.1.5.5的免疫逃避进行比较.
调查BA.2.86与ACE2相互作用的结构基础及其对传播能力的潜在影响.

主要方法:

使用接种疫苗或自然感染个体的血清对BA.2.86的抗体逃避的分析.
与其他SARS-CoV-2变种相比,BA.2.86的抗原景观映射.
对BA.2.86从强大的单克隆抗体中逃脱的评估.
对BA.2.86与ACE2的结合亲和力进行结构分析.

主要成果:

与XBB.1.5.5相比,BA.2.86的免疫逃避率略低.
这项研究为BA.2.86对ACE2.的增强亲和力提供了一个结构性的解释.
BA.2.86在Omicron变种领域中表现出明显的抗原性质.

结论:

BA.2.86具有显著的免疫逃避能力,但不如XBB.1.5.5那么容易逃避.
增加的ACE2结合亲和力表明BA.2.86.6的潜在更高的传播能力.
由于其独特的突变特征和传播潜力,需要进一步监测BA.2.86.

关键词:

具有ACE2结合性的ACE2结合性在BA.2.65中,BA.这就是SARS-CoV-2病毒.抗原性逃逸的方法冠状病毒冠状病毒的新冠病毒.结合受体与受体的结合方式病毒的演变病毒的演变病毒结构病毒结构

更多相关视频

Author Spotlight: Advancing Antiviral Strategies Through Novel Immunocapture and Mass Spectrometry Techniques

Author Spotlight: Advancing Antiviral Strategies Through Novel Immunocapture and Mass Spectrometry Techniques

Published on: January 12, 2024

Generation of Escape Variants of Neutralizing Influenza Virus Monoclonal Antibodies

Generation of Escape Variants of Neutralizing Influenza Virus Monoclonal Antibodies

Published on: August 29, 2017

相关概念视频

Conjugated Proteins

Conjugated 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...

Antibody Structure

Antibody Structure

Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...

Antibody Structure and Classes

Antibody Structure and Classes

Antibodies, also known as immunoglobulins, are produced by B cells in response to foreign substances, such as bacteria and viruses. These proteins are critical for recognizing and neutralizing these substances, protecting the body from potential harm.
The basic structure of an antibody consists of four protein chains: two identical heavy chains and two identical light chains. These chains are held together by disulfide bonds and other non-covalent interactions, forming a Y-shaped structure.

Leaky Scanning

Leaky Scanning

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...