MProinhibitor 11b is an inhibitor of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) main protease (MPro; IC50= 0.04 μM in a TR-FRET assay).1It reduces viral yield in the culture supernatant of SARS-CoV-2-infected VeroE6cells (EC50= 0.72 μM). MProinhibitor 11b also reduces viral RNA copy numbers in the same model when used at concentrations ranging from 1.85 to 50 μM. 1.Dai, W., Zhang, B., Jiang, X.-M., et al.Structure-based design of antiviral drug candidates targeting the SARS-CoV-2 main proteaseScience368(6497)1331-1335(2020)
Peptide originally derived from SARS-CoV Spike (S) protein; corresponds to amino acid residues 668 to 679. Highly potent inhibitor of SARS-CoV S protein and ACE2 interaction (IC50 = 1.88 nM in biochemical assay). Inhibits interaction of SARS-CoV S protein and VeroE6cells in vitro. Please note, this peptide displays 80% sequence identity to homologous site on SARS-CoV-2 S-protein (residues 689-697).