This is the "Mpro" protease of Sars-cov2, whose structure was recently determined and released by the Walsh group :
https://twitter.com/MartinWalshDLS/status/1236355083585179648
The docking task is to find small-molecule binders of the active site.
Ideally, if we found small molecules that bind to the contact surface between spike protein and human ACE2, we may block its spread in the body