Journal
SCIENCE
Volume 367, Issue 6483, Pages 1260-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abb2507
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Funding
- National Institutes of Health (NIH)/National Institute of Allergy and Infectious Diseases (NIAID) [R01-AI127521]
- NIAID
- University of Texas College of Natural Sciences
- Cancer Prevention and Research Institute of Texas (CPRIT) [RR160023]
- NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES [ZIAAI005125] Funding Source: NIH RePORTER
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The outbreak of a novel coronavirus (2019-nCoV) represents a pandemic threat that has been declared a public health emergency of international concern. The CoV spike (S) glycoprotein is a key target for vaccines, therapeutic antibodies, and diagnostics. To facilitate medical countermeasure development, we determined a 3.5-angstrom-resolution cryo-electron microscopy structure of the 2019-nCoV S trimer in the prefusion conformation. The predominant state of the trimer has one of the three receptor-binding domains (RBDs) rotated up in a receptor-accessible conformation. We also provide biophysical and structural evidence that the 2019-nCoV S protein binds angiotensin-converting enzyme 2 (ACE2) with higher affinity than does severe acute respiratory syndrome (SARS)-CoV S. Additionally, we tested several published SARS-CoV RBD-specific monoclonal antibodies and found that they do not have appreciable binding to 2019-nCoV S, suggesting that antibody cross-reactivity may be limited between the two RBDs. The structure of 2019-nCoV S should enable the rapid development and evaluation of medical countermeasures to address the ongoing public health crisis.
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