GlutathioneS-transferase as a general and reversible tag for surface immobilization of proteins

Abstract

The ability to immobilize biomolecules on nanopatterned substrates is important for diverse applications including tissue engineering and proteomics. The design of general linkers can allow a single substrate to be used for multiple purposes, as well as reconfiguration of devices if the linkage is reversible. In this work, the glutathione S-transferase (GST) tag was used to reversibly immobilize green fluorescent protein (GFP) and basic fibroblast growth factor (FGF2) on glutathione (GSH)-functionalized nanopatterns fabricated by electron-beam lithography.