SARS-CoV-2 NSP13与TEAD相互作用,以抑制Hippo-YAP信号传递
bioRxiv : the preprint server for biology
|July 16, 2025
概括
严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 非结构蛋白13 (NSP13) 通过破坏河马通路来抑制YAP/TEAD介导的基因表达. 这种病毒蛋白向YAP的转录活性,影响器官的稳态和再生.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 河马通路,调节器官大小,对于发育和恒温至关重要.
- 通过YAP/TEAD介导的基因表达是Hippo通路功能的核心.
- SARS-CoV-2 感染对 Hippo-YAP 途径的影响在很大程度上没有被描述.
研究的目的:
- 调查SARS-CoV-2在Hippo-YAP通路功能障碍中的作用.
- 为了识别特定的SARS-CoV-2蛋白调节YAP/TEAD活动.
- 阐明SARS-CoV-2影响YAP转录活动的机制.
主要方法:
- 来自iPSC-CMs和SARS-CoV-2感染的人类肺样本的RNA测序数据的分析.
- 查SARS-CoV-2非结构性蛋白质对YAP活动的影响.
- 对NSP13突变的研究,以确定其酶活性的作用.
- 生物化学测试以了解NSP13,YAP和TEAD4.4之间的相互作用.
主要成果:
- 感染SARS-CoV-2导致YAP目标基因表达的降低.
- 在SARS-CoV-2非结构蛋白13 (NSP13) 抑制了YAP转录活性,独立于LATS1/2.2.
- NSP13的螺旋酶活性 (DNA结合和解) 对于抑制YAP至关重要.
- NSP13与YAP和TEAD4相互作用,重塑染色质并招募TTF2以禁用YAP/TEAD复合体.
结论:
- 在SARS-CoV-2 NSP13中,直接抑制了YAP/TEAD介导的转录.
- NSP13利用其酶活性来抑制YAP的交换激活.
- 揭示了一种涉及NSP13和染色体重塑的YAP/TEAD调节的新机制.
- 这些发现为在SARS-CoV-2感染期间的Hippo-YAP途径失调提供了分子洞察力.
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