Translocation of acylated pardaxin into cells

Acylated pardaxin is translocated through the cytoplasmic membrane and is accumulated in the nucleoli of NG108-15 and chromaffin cells. The uptake is time- and dose-dependent and temperature-sensitive. However, the binding of acylated 125I-pardaxin cannot be reduced by competition with pardaxin acylated with Rudinger's reagent. In this respect, acylated pardaxin resembles the Tat protein 37-71 fragment. Metabolic inhibitors do not significantly reduce the uptake of acylated 125I-pardaxin. Acylated pardaxin might be useful as a vector to translocate other molecules.