Ac-Ile-Glu-Thr-Asp-pNA is a caspase-8 substrate that undergoes enzymatic binding and cleavage specifically at the Ile-Glu-Thr-Asp (IETD) peptide sequence. This cleavage results in the release of p-nitroalinide, which can be quantitatively measured using colorimetric detection at 405 nm. This measure serves as an indicator of caspase-8 enzyme activity.
RAS inhibitor Abd-7 is a powerful compound (Kd=51 nM) that binds to RAS and inhibits the protein-protein interaction (PPI) between RAS and its effectors. By interacting with RAS within cells, RAS inhibitor Abd-7 hinders RAS-effector interactions and suppresses endogenous RAS-dependent signaling. Additionally, RAS inhibitor Abd-7 disrupts the PPI of different mutant KRAS proteins with PI3K, CRAF, RALGDS, as well as NRAS Q61H and HRAS G12V[1].