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来自Coxsackievirus B3和B4的3C蛋白酶的晶体结构

Haihai Jiang¹, Cheng Lin², Jingyi Chang¹

¹School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang 330031, People's Republic of China.

Acta crystallographica. Section F, Structural biology communications

|July 25, 2024

概括

对Coxsackievirus B3 (CVB3) 和Coxsackievirus B4 (CVB4) 3C蛋白酶的结构分析揭示了对病毒传播至关重要的保存特征. 这些发现指导了针对这些必需的病毒酶的广泛抗病毒抑制剂的开发.

科学领域:

病毒学病毒学
结构生物学结构生物学
生物化学生物化学

背景情况:

肠道病毒,包括Coxsackievirus B3 (CVB3) 和Coxsackievirus B4 (CVB4),是造成各种疾病的重大公共卫生威胁.
CVB3与病毒性心肌炎有关,而CVB4可能会加剧1型糖尿病.
CVB3和CVB4的3C蛋白酶对于病毒复制和传播至关重要.

研究的目的:

从结构上描述CVB3和CVB4中的3C蛋白酶.
为了解肠道病毒传播的分子机制提供见解.
促进新型抗病毒疗法的设计.

主要方法:

在大肠杆菌中,CVB3和CVB4 3C蛋白酶的表达和净化.
使用亲和和凝过色谱进行净化.
为了结构确定,X射线晶体学和分子替代.

主要成果:

在2.10 Å和2.01 Å分辨率下,对CVB3和CVB4 3C蛋白酶的结晶和结构确定.
这两种蛋白酶都表现出一种类似于基米托里的折叠,具有保存的催化三合体 (His40-Glu71-Cys147).
在CVB3和CVB4 3C蛋白酶与其他肠道病毒蛋白酶之间观察到高度的结构相似性,但差异很小.

结论:

确定的结构为CVB3和CVB4 3C蛋白酶的功能提供了详细的分子基础.
结构上的相似性表明,可能存在广谱抑制.
这些发现有助于指导针对肠道病毒的向抗病毒抑制剂的合理设计.

关键词:

3C蛋白酶是一种3C蛋白酶.在CVB3中,CVB3是指CVB3.在CVB4中,使用CVB4.考克萨克病毒病毒.晶体结构晶体结构

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