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PQBP1与HIV-1体晶格结合的分子决定因素

Juliana Piacentini¹, Dale S Allen², Barbie K Ganser-Pornillos³

¹University of Virginia, Department of Molecular Physiology & Biological Physics, Charlottesville, VA, USA.

Journal of molecular biology

|December 21, 2023

概括

聚氨胺结合蛋白1 (PQBP1) 通过电荷互补性与人类免疫缺陷病毒1型 (HIV-1) 体结合. 这种相互作用对于在HIV-1感染期间激活先天免疫反应至关重要.

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:

人类免疫缺陷病毒1型 (HIV-1) 感染引发先天性免疫反应,包括由循环GMP-AMP合成酶 (cGAS) 信号传导的I型干扰素产生.
艾滋病毒-1对cGAS的激活取决于宿主细胞因子多重质胺结合蛋白1 (PQBP1),这是一个内在失调的蛋白质.
控制PQBP1与HIV-1囊体相互作用的精确分子机制及其功能后果尚未完全阐明.

研究的目的:

为了阐明PQBP1如何与HIV-1囊相互作用的分子细节.
了解PQBP1-HIV-1囊相互作用在先天性免疫激活中的功能影响.

主要方法:

蛋白质与蛋白质相互作用的结构分析.
生物化学试验用于研究结合接口.
在体外研究PQBP1与HIV-1囊组件结合.

主要成果:

通过充电补充相互作用,PQBP1与HIV-1囊体进行交互.
在PQBP1的N端区域中,特定的酸性残留物与HIV-1 CA六合体的中央通道中的氨酸环相互作用.
这代表了PQBP1和HIV-1囊之间的主要结合接口.

结论:

这项研究揭示了PQBP1和HIV-1囊之间的初始相互作用的分子基础.
这些发现提供了关于HIV-1如何参与宿主因子来调节先天免疫力的见解.
对于稳定的PQBP1与HIV-1囊结合,可能需要额外的相互作用.

关键词:

收费补充补充收费补充主体因素是宿主因素.天生的免疫反应.病毒囊体的病毒囊体

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