在HKU5冠状病毒中ACE2受体利用的融合演变的分子基础
Young-Jun Park1,2, Chen Liu3, Jimin Lee1
1Department of Biochemistry, University of Washington; Seattle, WA 98195, USA.
bioRxiv : the preprint server for biology
|September 10, 2024
概括
包括HKU5在内的Merbecoviruses可以使用ACE2受体进入细胞,而不仅仅是DPP4. 这一发现揭示了各种ACE2结合模式,并表明这种特征在冠状病毒中独立演变.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 滴基酶4 (DPP4) 是已确定的merbecoviruses的受体.
- 最近的发现表明,一些非洲蝙蝠传播的与MERS相关的冠状病毒利用 ангиотензин转化酶2 (ACE2).
- 在merbecoviruses中ACE2参与和受体热带的范围在很大程度上仍未被探索.
研究的目的:
- 为了研究ACE2利用的程度和多样性,由merbecoviruses.
- 通过ACE2确定默贝科病毒通过ACE2进入的受体物种热带.
- 了解在merbecoviruses中ACE2使用的结合机制和进化途径.
主要方法:
- 使用蝙蝠和非蝙蝠哺乳动物ACE2的细胞进入试验2.
- 通过结构和功能研究分析结合模式.
- 在MERS-CoV和HKU之间的抗原性比较5.
- 对HKU5.5进行抑制剂查.
主要成果:
- HKU5利用Pipistrellus abramus (P.abr) 的ACE2和一些非蝙蝠哺乳动物的ACE2进入细胞.
- 与其他已知的使用ACE2的冠状病毒相比,HKU5采用了不同的ACE2结合模式.
- 多个merbecovirus类独立地通过不同的识别模式进化了ACE2利用.
- 由于遗传差异,MERS-CoV和HKU5表现出明显不同的抗原性.
- 确定了几种HKU5抑制剂,包括两种临床化合物.
结论:
- ACE2利用是一种广泛且独立进化的特征,存在于不同类型的merbecovirus中.
- 梅尔贝病毒在ACE2识别模式中表现出了显著的多样性.
- 在MERS-CoV和HKU5之间明显的抗原性突显了它们的遗传分歧.
- 这些发现为新冠病毒的演变和新兴病毒的潜在治疗点提供了关键的见解.
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