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狂犬病病毒RNA聚合酶L蛋白C终端域的功能剖析

Fumiki Izumi^1,2, Machiko Makino³, Michihito Sasaki^4,5

¹Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan.

Journal of virology

|March 11, 2025

概括

狂犬病病毒的大型蛋白质

科学领域:

病毒学病毒学
分子生物学分子生物学
结构生物学结构生物学

背景情况:

狂犬病病毒RNA依赖RNA聚合酶 (RdRp) 对于病毒复制至关重要.
该L蛋白和P蛋白形成病毒的RdRp.
L蛋白的C端域 (CTD) 对于P蛋白结合至关重要.

研究的目的:

研究NPYNE序列在L蛋白的CTD中的功能作用.
阐明NPYNE序列中的特定残留物对L-P相互作用和RdRp活性的贡献.

主要方法:

在狂犬病病毒L蛋白中的NPYNE序列的局部定向突变发生.
突变病毒的复制能力测定.
对L-P蛋白结合和RdRp活性进行分析.

主要成果:

在NPYNE序列中的突变显著减少了病毒复制.
Asn在L1929对于P蛋白结合和RdRp功能都至关重要.
在L1932的Asn和L1933的Glu分别在RdRp功能和P蛋白结合中发挥作用.
NPYNE序列通过L-P相互作用稳定了L蛋白.

结论:

含有NPYNE序列的L蛋白CTD中的第一个α螺旋对P蛋白结合,RdRp功能和L蛋白稳定性至关重要.
这种螺旋间接促进L-P相互作用,影响病毒复制.
这些发现为开发针对拉布多病毒中L-P相互作用的治疗方法提供了洞察力.

关键词:

这种RNA聚合酶是RNA聚合酶.狂犬病是一种狂犬病.

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