To provide a simple and
effective method for rapidly shutting off the production and / or function of specific proteins in eukaryotes.SOLUTION: Described herein are engineered fusion proteins comprising a variant
protease (e.g., an HCV NS3
protease) fused to a polypeptide of interest and a cognate
protease cleavage site. The cleavability of the cognate protease cleavage site enables the
controllability of one or more functions of the polypeptide of interest. Additionally, disclosed are methods for generating engineered fusion proteins as well as their therapeutic use.SELECTED DRAWING: None