PaX560-QacR light-mediated transcriptional regulation system
Multi-Component SwitchPaX560-QacR is a light-mediated transcriptional regulation system that couples the caging-group-free photoactivatable dye PaX560 to the multidrug-binding transcriptional repressor QacR. Visible-light-driven traceless photoconversion generates a cationic dye that binds QacR, weakens repression, and activates transcription in vitro and in living cells.