相关实验视频
Updated: Sep 13, 2025

13:00
Engineering Antiviral Agents via Surface Plasmon Resonance
Published on: June 14, 2022
2.4K
萨比亚病毒尖峰复合体中的金属诱导的构造变化
Hadas Cohen-Dvashi1, Michael Katz1, Ron Diskin2
1Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, Israel.
Nature microbiology
|August 1, 2025
概括
研究人员揭示了萨比亚病毒尖端蛋白质结构,这对于了解出血性发烧病毒至关重要. 这一发现澄清了Arenaviridae家族成员之间病毒进入机制的差异.
科学领域:
- 结构生物学是结构生物学.
- 病毒学 病毒学
- 分子机制的分子机制
背景情况:
- 包括出血热病毒在内的Arenaviridae病毒,由于潜在的致命爆发和有限的治疗选择,构成重大公共卫生风险.
- "旧世界"的arenavirus尖端蛋白质的结构数据存在,但"新世界"的arenavirus,如Sabiá病毒,缺乏相应的结构,阻碍了对病毒进入机制的比较分析.
研究的目的:
- 确定萨比亚病毒尖峰复合物的结构,负责调解病毒附着和宿主细胞进入.
- 阐明萨比亚病毒尖端蛋白的构造状态,并确定在细胞进入过程中影响其激活的因素.
主要方法:
- 使用单颗粒冷电子显微镜 (cryo-EM) 解析了分离的萨比亚病毒尖峰复合物的结构.
- 在尖端蛋白质的两个不同的构造状态上进行了高分辨率的结构分析.
主要成果:
- 这项研究介绍了萨比亚病毒尖峰复合物的冷-电磁结构,其原始封闭状态 (2.6 Å分辨率) 和在进入细胞时采用的开放状态 (2.9 Å分辨率).
- 发现尖端蛋白质向其开放状态的构造过渡和随后的细胞进入取决于酸性pH值和未识别的金属离子.
结论:
- 确定的结构为"新世界"竞技病毒尖端蛋白的分子架构提供了关键的见解.
- 这些发现表明,B类的阿雷纳病毒和阿雷纳病毒家族的其他成员之间的细胞进入机制可能存在差异,这突显了对阿雷纳病毒多样性的进一步调查的需要.
更多相关视频
07:10Conformational Evaluation of HIV-1 Trimeric Envelope Glycoproteins Using a Cell-based ELISA Assay
Published on: September 14, 2014
14.4K
10:50Assessment of Immunologically Relevant Dynamic Tertiary Structural Features of the HIV-1 V3 Loop Crown R2 Sequence by ab initio Folding
Published on: September 15, 2010
9.7K
相关概念视频
Leaky Scanning
5.2K
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...
5.2K
Conjugated Proteins
18.5K
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...
18.5K
SNAREs and Membrane Fusion
11.1K
Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
11.1K
Protein Complex Assembly
10.9K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
10.9K
Viral Structure
63.8K
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.
63.8K