SMAC/DIABLO [Lys(5-FAM)] – Fluorescent Peptides

SMAC/DIABLO [Lys(5-FAM)] is a pro-apoptotic peptide that is derived from the mitochondrial protein known either as Second Mitochondria-Derived Activator of Caspases (Smac) or Direct IAP Binding Protein with low isoelectric point, pI (DIABLO). During apoptosis the mitochondria has increased permeability to Smac/DIABLO, which causes the protein to diffuse into the cytosol. Here, Smac/DIABLO adheres to Inhibitors of apoptosis proteins (IAPs) and prevents them from binding to caspases, which in turn accentuates apoptosis. This peptide has a C-terminal lysine linker labelled with 5-Carboxyfluorescein (5-FAM), a widely used, green fluorescent tag.