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本帖最后由 邓文龙 于 2022-4-12 11:40 编辑
Nature:ACE2 结合是冠状病毒 sarbecoviruses 的祖先和可演化特征
领研网
2022/04/11
论文
论文标题:ACE2 binding is an ancestral and evolvable trait of sarbecoviruses
作者:Tyler N. Starr, Samantha K. Zepeda, Alexandra C. Walls, Allison J. Greaney, Sergey Alkhovsky, David Veesler & Jesse D. Bloom
期刊:Nature
发表时间:2022/02/03
数字识别码:10.1038/s41586-022-04464-z
摘要:Two different sarbecoviruses have caused major human outbreaks in the past two decades1,2. Both of these sarbecoviruses, SARS-CoV-1 and SARS-CoV-2, engage ACE2 through the spike receptor-binding domain2,3,4,5,6. However, binding to ACE2 orthologues of humans, bats and other species has been observed only sporadically among the broader diversity of bat sarbecoviruses7,8,9,10,11. Here we use high-throughput assays12 to trace the evolutionary history of ACE2 binding across a diverse range of sarbecoviruses and ACE2 orthologues. We find that ACE2 binding is an ancestral trait of sarbecovirus receptor-binding domains that has subsequently been lost in some clades. Furthermore, we reveal that bat sarbecoviruses from outside Asia can bind to ACE2. Moreover, ACE2 binding is highly evolvable—for many sarbecovirus receptor-binding domains, there are single amino-acid mutations that enable binding to new ACE2 orthologues. However, the effects of individual mutations can differ considerably between viruses, as shown by the N501Y mutation, which enhances the human ACE2-binding affinity of several SARS-CoV-2 variants of concern12 but substantially decreases it for SARS-CoV-1. Our results point to the deep ancestral origin and evolutionary plasticity of ACE2 binding, broadening the range of sarbecoviruses that should be considered to have spillover potential.
所属学科:
病毒学
(导读 阿金)两种不同的冠状病毒曾先后引发疫情大暴发。本研究使用高通量评估跟踪了大范围冠状病毒sarbecoviruses和ACE2同源基因序列的ACE2结合演化史,发现ACE2结合是sarbecoviru受体结合结构域的祖先性状。而且ACE2结合还具有高度的可进化性,单个氨基酸突变即可结合新的ACE2同源基因序列。该结果指出了ACE2结合的祖先深层起源以及演化可塑性。
文章标签
冠状病毒
sarbecoviruses
ACE2结合
同源基因序列
https://www.nature.com/articles/s41586-022-04464-z
https://www.linkresearcher.com/t ... 1-ab6d-6f39e52f8e0b
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