Solid. Soluble in DMSO. Insoluble in water. Potent, irreversible cysteine protease inhibitor, Broad-range cathepsin inhibitor (for all known cathepsins) useful for inflammasome inhibition. Inhibits cathepsins B, L, S, C, V, K and papain in cell-free assays. Inhibits cathepsin X as well, Suppresses particle-induced...

K777 is a cysteine protease inhibitor. It inhibits human cathepsin S (Ki = 0.002 µM) and human cathepsin L (Ki = 0.05 µM), which cleaves the severe acute respiratory coronavirus 2 (SARS-CoV-2) spike glycoprotein, also known as the surface glycoprotein. K777 is selective for these proteases over human cathepsin K,...