期刊
CELL
卷 185, 期 4, 页码 630-+出版社
CELL PRESS
DOI: 10.1016/j.cell.2022.01.001
关键词
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资金
- National Key R&D Program of China [2021YFC2301401, 2020YFA0907102, 2020YFA0509202, 2021YFC0863300]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB29010202, XDB37030204]
- Queensland-Chinese Academy of Sciences Collaborative Science Fund 2020 [153211KYSB20200001]
- Chinese Academy of Sciences
- Science and Technology Innovation Committee of Shenzhen Municipality [JSGG20200207155251653]
- President's Excellent Postdoctoral Program of SUSTech
The study found that the omicron variant, unlike other variants, has a similar affinity to the human receptor ACE2 as the prototype variant. Multiple mutations in the omicron variant may compensate for both immune escape and transmissibility. The complex structures of the omicron and delta variants binding to ACE2 provide insights into how specific mutations affect the binding.
The coronavirus disease 2019 (COVID-19) pandemic continues worldwide with many variants arising, some of which are variants of concern (VOCs). A recent VOC, omicron (B.1.1.529), which obtains a large number of mutations in the receptor-binding domain (RBD) of the spike protein, has risen to intense scientific and public attention. Here, we studied the binding properties between the human receptor ACE2 (hACE2) and the VOC RBDs and resolved the crystal and cryoelectron microscopy structures of the omicron RBD-hACE2 complex as well as the crystal structure of the delta RBD-hACE2 complex. We found that, unlike alpha, beta, and gamma, omicron RBD binds to hACE2 at a similar affinity to that of the prototype RBD, which might be due to compensation of multiple mutations for both immune escape and transmissibility. The complex structures of omicron RBD-hACE2 and delta RBD-hACE2 reveal the structural basis of how RBD-specific mutations bind to hACE2.
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