Cellular macromolecules proximal to KillerRed

KillerRed is a genetically encoded red fluorescent protein that functions as a potent photosensitizer, originally derived from the jellyfish Anemonia sulcata (Bulina et al., 2006, Nature Biotechnology). When exposed to green light, the chromophore of KillerRed undergoes a photochemical reaction that generates reactive oxygen species (ROS), specifically superoxide radicals, which cause localized oxidative damage to nearby cellular macromolecules such as proteins, lipids, and nucleic acids. This phenomenon is the basis for chromophore-assisted light inactivation (CALI), a technique used in cell biology to achieve high-precision, light-mediated knockdown of protein function in real-time. Because the term refers to a broad and variable set of molecules defined only by their proximity to the KillerRed protein during illumination, it does not represent a single therapeutic target or a specific biological receptor. Instead, it describes an experimental condition used to study protein function and cellular signaling pathways through induced oxidative stress. There are currently no therapeutic drugs that target this specific collection of molecules, as the interaction is mediated by light and the KillerRed protein itself in a research context. Consequently, this entity is primarily a tool for functional genomics and proteomics rather than a target for drug development.

Other names

KillerRed-affected proteinsCALI targetsPhotosensitizer-proximal molecules

Chromophore-assisted light inactivation (CALI) via green light-induced generation of superoxide radicals and other reactive oxygen species.