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Ou, Xiuyuan; Liu, Yan; Lei, Xiaobo; Li, Pei; Mi, Dan; Ren, Lili; Guo, Li; Guo, Ruixuan; Chen, Ting; Hu, Jiaxin; Xiang, Zichun; Mu, Zhixia; Chen, Xing; Chen, Jieyong; Hu, Keping; Jin, Qi; Wang, Jianwei; Qian, Zhaohui
Nature communications, 03/2020, Volume: 11, Issue: 1Journal Article
Since 2002, beta coronaviruses (CoV) have caused three zoonotic outbreaks, SARS-CoV in 2002-2003, MERS-CoV in 2012, and the newly emerged SARS-CoV-2 in late 2019. However, little is currently known about the biology of SARS-CoV-2. Here, using SARS-CoV-2 S protein pseudovirus system, we confirm that human angiotensin converting enzyme 2 (hACE2) is the receptor for SARS-CoV-2, find that SARS-CoV-2 enters 293/hACE2 cells mainly through endocytosis, that PIKfyve, TPC2, and cathepsin L are critical for entry, and that SARS-CoV-2 S protein is less stable than SARS-CoV S. Polyclonal anti-SARS S1 antibodies T62 inhibit entry of SARS-CoV S but not SARS-CoV-2 S pseudovirions. Further studies using recovered SARS and COVID-19 patients' sera show limited cross-neutralization, suggesting that recovery from one infection might not protect against the other. Our results present potential targets for development of drugs and vaccines for SARS-CoV-2.
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