SARS-CoV-2 ORF10劫持无处不在的机器揭示了潜在的独特药物向站点
Kaixiang Zhu1,2, Lili Song3, Linyue Wang1,2
1NHC Key Laboratory of Systems Biology of Pathogens, National Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
Acta pharmaceutica Sinica. B
|September 23, 2024
概括
在SARS-CoV-2中,ORF10蛋白通过模仿降解信号来劫持CUL2ZYG11B酶. 这种病毒策略破坏毛功能,导致COVID-19症状,并提供新的治疗点.
科学领域:
- 结构生物学和病毒学.
- 乌比基化和蛋白质降解途径
背景情况:
- 病毒,包括SARS-CoV-2,操纵宿主无处不在的机器,以复制和致病.
- 在SARS-CoV-2中,ORF10蛋白与CUL2ZYG11B相互作用,这是cullin-2 RING E3结合酶复合物的组成部分.
- 这种相互作用导致IFT46的降解,导致状腺功能障碍,并导致COVID-19症状.
研究的目的:
- 阐明SARS-CoV-2ORF10识别并与CUL2ZYG11B结合的分子机制.
- 研究这种相互作用在病毒病原和宿主蛋白质降解中的作用.
- 探索基于这种相互作用的潜在治疗策略.
主要方法:
- 确定了CUL2ZYG11B-ORF10 N-终端延伸 (NTE) 复合物的晶体结构.
- 利用突变发生学研究来确定关键的相互作用残留物.
- 采用异热定位热量计 (ITC) 和体内细胞测试来评估结合亲和力和功能后果.
- 应用了全球蛋白质稳定系统来分析竞争性结合和基质降解.
主要成果:
- 晶体结构显示,ORF10 N-终端七分 (NTH) 模仿Gly/N-degron动机结合CUL2ZYG11B.
- 对CUL2ZYG11B相互作用至关重要的关键ORF10残留物通过突变发生被确定.
- 通过ORF10介导的CUL2ZYG11B活性增强与结合亲和力相关.
- 在ORF10的NTH竞争性地抑制了Gly/N-degron基板的降解.
结论:
- SARS-CoV-2 ORF10通过模仿细胞降解信号来结合CUL2ZYG11B来利用宿主无处不在机制.
- 这种相互作用导致IFT46降解,状腺功能障碍,并可能导致COVID-19症状.
- 这些发现为开发基于PROTAC的治疗方法提供了洞察力,并确定了COVID-19治疗的潜在目标.
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