Exhibits antifungal and cytotoxic activity against some tumor cell lines partly attributed to inhibition of Ras-inducible genes. Inhibits proliferation of mouse and human T cells and modulates production of cytokines during T cell activation. Facilitates the ubiquitinylation process of cyclin D1. Has been identified as a potent and selective inhibitor of threonine/tyrosine-specific kinase, MEK, and other protein kinases that contain a conserved cysteine residue in the ATP-binding site in both in vitro and in vivo studies. Hypothemycin inhibited the growth of HT29 and HCT116 cells in serum-free defined medium. IC50 at 0.078 mM and 0.90 mM, respectively.
Hypothemycin concurrently inhibitis Kit- and FcεRI-mediated signaling.