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Qiuyu J Huang¹, Ryan Kim¹, Kangkang Song¹

¹Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, Worcester, MA 01605.

Proceedings of the National Academy of Sciences of the United States of America

|April 17, 2025

概括

在结合宿主细胞受体后,流感病毒的血凝素 (HA) 三分体聚集在一起. 这项研究揭示了病毒葡萄糖蛋白在宿主细胞进入过程中的动态和可塑性的新见解.

科学领域:

病毒学病毒学
结构生物学结构生物学
分子生物学分子生物学

背景情况:

流感病毒是对公共健康至关重要的RNA病毒.
血凝素 (HA) 是一种关键的病毒甘氨蛋白,参与宿主细胞的进入.
之前的研究集中在纯化的HA结构上,而不是病毒级组织.

研究的目的:

为了研究流感HA在受体结合后的病毒体上的结构组织.
了解受体相互作用如何影响HA的构造和排列.

主要方法:

低温电子断层扫描用于可视化流感病毒.
用酸受体模仿剂来研究受体结合.
用于高分辨率分析,进行了子图平均值和精细化.

主要成果:

受体结合并没有显著改变整体病毒形态.
HA剪裁器在组织和结合时的方向上显示了重新排列.
观察到HA剪切物的集群,形成三重排列.
确定了调解这种聚类的特异性三元体间接触.

结论:

流感HA表现出可塑性,与受体结合诱导三元体集群.
这种聚类代表了HA在病毒表面的动态反应.
这些发现为理解流感病毒与宿主相互作用增加了新的层次.

关键词:

低温电子断层扫描 (Cryoelectron tomography) 是一种电子断层扫描.血凝氨酸是什么血凝氨酸流感流感流感流感流感

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