通过SERCA相互作用,SARS-CoV-2信封蛋白改变了信号传递
Blanka Berta1, Hedvig Tordai1, Gergely L Lukács2
1Institute of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary.
Scientific reports
|September 11, 2024
概括
在SARS-CoV-2信封 (E) 蛋白破坏宿主细胞 (Ca2+) 通过与SERCA调节器相互作用. 这一发现揭示了严重的COVID-19管理的新治疗标.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 细胞生理学 细胞生理学
背景情况:
- 严格的COVID-19管理仍然具有挑战性,需要确定治疗点.
- SARS-CoV-2信封 (E) 蛋白是一种关键的毒性因子,在病变发生过程中理解不充分的作用.
- 蛋白质E形成pentameric病毒素,这些病毒素会扰乱细胞 (Ca2+) 恒温.
研究的目的:
- 调查SARS-CoV-2 E蛋白在调节/内质网膜 ATPases (SERCA) 中的作用.
- 为了确定E蛋白是否作为一种外调蛋白,类似于已知的SERCA调节剂.
主要方法:
- 福斯特共振能量转移 (FRET) 实验用于评估E蛋白与 regulins 的寡合化.
- 同免疫沉或类似的测定以确认E蛋白与SERCA2b之间的直接相互作用.
- 结构建模以阐明E蛋白, regulins 和 SERCA 之间的相互作用接口.
主要成果:
- SARS-CoV-2 E 蛋白与内源性 regulins 形成寡合体,改变它们的比例和与 SERCA 的相互作用.
- 证实了E蛋白与SERCA2b之间的直接相互作用,导致ER Ca2+再吸收减少.
- 结构建模揭示了SERCA上E蛋白和内源性 regulins的重叠结合点.
结论:
- SARS-CoV-2 E蛋白直接通过调节调节蛋白相互作用来干扰SERCA功能.
- 这种相互作用会破坏的平衡,从而导致病毒病原性.
- 针对E蛋白-SERCA相互作用,为严重的COVID-19提供了一个潜在的治疗策略.
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