通过KAT5γ对NS3基酶的乙化对于弗拉维病毒复制是必不可少的
Taryn Serman1, Cindy Chiang2, GuanQun Liu2
1Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, FL 34987, USA; Department of Microbiology, The University of Chicago, Chicago, IL 60637, USA.
Cell host & microbe
|July 21, 2023
概括
寨卡病毒NS3螺旋酶由宿主酶KAT5γ乙化调节RNA结合和病毒复制. 这一发现揭示了开发抗黄病毒药物的新目标.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 针对蛋白酶,聚合酶和酶等病毒酶是抗病毒药物设计的关键.
- 病毒螺旋酶是具有挑战性的目标,需要使用替代抗病毒策略.
- 在寨卡病毒 (ZIKV) 复制过程中,NS3螺旋酶是必不可少的.
研究的目的:
- 调查ZIKV NS3直酶功能的翻译后修改的作用.
- 为了确定参与调节ZIKV复制的宿主因素.
- 探索新型的治疗点,用于弗拉维病毒感染.
主要方法:
- 对ZIKV NS3蛋白的乙化部位进行映射.
- 使用修改和未修改的NS3进行RNA结合和解试验.
- 共同免疫沉和西部抹迹来识别相互作用的主体蛋白质.
- 在KAT5γ的存在和缺席下进行病毒复制测试.
主要成果:
- ZIKV NS3酶在它的RNA结合道中经历了乙化,特别是在K389.
- 乙化K389调节NS3的RNA结合和解活动.
- 主体乙转移酶KAT5异型 γ (KAT5γ) 调解NS3乙化并转移到病毒复制部位.
- 通过KAT5γ对NS3的乙化对于有效的ZIKV复制至关重要.
- 这种乙化机制及其前病毒性作用在西尼罗河病毒 (WNV),登革热病毒 (DENV) 和黄热病病毒 (YFV) 中得到保留.
结论:
- 主体乙转移酶KAT5γ通过乙化直接调节ZIKV NS3酶的功能.
- NS3乙化是一种关键的宿主病毒相互作用,促进病毒复制.
- 向KAT5γ-NS3乙化轴为针对ZIKV和相关的黄病毒病毒的抗病毒药物开发提供了一个有希望的新策略.
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