Structural plasticity of SARS-CoV-2 3CL Mproactive site cavity revealed by room temperature X-ray crystallography.
Kneller, D.W., Phillips, G., O'Neill, H.M., Jedrzejczak, R., Stols, L., Langan, P., Joachimiak, A., Coates, L., Kovalevsky, A.(2020) Nat Commun 11: 3202-3202
- PubMed: 32581217 
- DOI: https://doi.org/10.1038/s41467-020-16954-7
- Primary Citation of Related Structures:  
6WQF - PubMed Abstract: 
The COVID-19 disease caused by the SARS-CoV-2 coronavirus has become a pandemic health crisis. An attractive target for antiviral inhibitors is the main protease 3CL M pro due to its essential role in processing the polyproteins translated from viral RNA. Here we report the room temperature X-ray structure of unliganded SARS-CoV-2 3CL M pro , revealing the ligand-free structure of the active site and the conformation of the catalytic site cavity at near-physiological temperature. Comparison with previously reported low-temperature ligand-free and inhibitor-bound structures suggest that the room temperature structure may provide more relevant information at physiological temperatures for aiding in molecular docking studies.
Organizational Affiliation: 
Neutron Scattering Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37831, USA.