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The rapid global spread of SARS-CoV-2 has recently caused havoc and forced the world into a state of the pandemic causing respiratory, gastrointestinal, hepatic, and neurologic diseases. It persistently, through mutation, develops into new variants of the virus that have appeared over time. As main protease (M pro ) is involved in proteolysis of two overlapping polyproteins  pp1a  and  pp1ab  to produce 16 non-structural proteins having a paramount factor in the virus replication that have a cysteine–histidine catalytic dyad. A computational approach, guiding a covalent docking as it offers higher potency, long duration of action and decreased drug resistance advantages over the conventional docking of the ligands on a catalytic dyad, is applied for SARS-CoV-2 main protease (M pro ) in this manuscript to divulge better molecules. M pro  active site contains Cys145 residue which act as a nucleophile and can donate its electron to an electrophilic molecule by interacting covalently. Furthermore, the ligand–protein complexes are allowed to simulate their dynamic studies to look into their time-based interaction stability and also, a parallel study of ADME properties for the hit molecules is also performed. Important insights from the studies revealed that the interactions are persistent and molecules may be considered for further optimization in clinical investigation. Communicated by Ramaswamy H. Sarma.

Identification of prospective covalent inhibitors for SARS-CoV-2 main protease using structure-based approach