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Updated: Jun 3, 2025

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核糖体定制和P-茎蛋白之间的功能多样化调节了晚期波克斯病毒蛋白质合成

Natalia Khalatyan¹, Daphne Cornish², Aaron J Ferrell³

¹Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.

|January 9, 2025

概括

毒杆病毒改变了核糖体结构,以控制蛋白质合成. 特定的核糖体蛋白 (RP) 成为转化病毒晚期mRNA的必需物,突出显示了一种新的病毒与宿主相互作用.

科学领域:

分子生物学分子生物学
病毒学病毒学
结构生物学结构生物学

背景情况:

核糖体选择性地调节特定信使RNA (mRNA) 子集的翻译.
毒杆病毒是大型DNA病毒,具有复杂的复制策略.

研究的目的:

为了研究病毒感染如何影响核糖体的组成和功能.
为了确定特定的核糖体蛋白 (RP) 参与poxvirus mRNA翻译.

主要方法:

定量蛋白质组学用于分析核糖体蛋白质组成.
低温电子显微镜用于确定核糖体中的结构变化.
基因淘汰屏幕和代谢测试来评估RP功能.
双记者病毒测定用于研究病毒mRNA翻译.

主要成果:

脊髓灰质炎病毒感染并没有改变整体核糖体子单元蛋白 (RP) 组成.
感染导致40S核糖体子单元的结构变化,包括改变的旋转状态和移位的头部域.
激活的C激酶1 (RACK1) 和RPLP2的受体被确定为对晚期天花病毒mRNAs的非正规翻译至关重要的RP.
RPLP2是P-stalk的一个子单元,特别需要用于病毒蛋白质合成,而RPLP1是不可用的.

结论:

脊髓灰质炎病毒结构性地定制宿主核糖体,以有利于它们自己的mRNA翻译.
病毒变得依赖于传统的非必要的RP,如RACK1和RPLP2,以有效地启动晚期病毒mRNA.
这项研究揭示了一种复杂的病毒翻译控制机制,涉及核糖体结构适应.

关键词:

科普:分子生物学分子生物学这是一个CRISPR屏幕.这就是P-stalk.在RACK1中,使用RACK1.在RPLP2中使用RPLP2.低温电磁波冷却器 (Cryo-EM) 是一个非常好的方法.麻疹病毒 (poxvirus) 是一种病毒.核糖体定制的定制方式翻译控制的翻译控制

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