In-vivo proximity-based labeling systems and applications thereof

Abstract

In one aspect, compositions and methods are described herein for providing a microenvironment mapping platform operable to selectively identify various features, including in vivo protein-protein interactions on cellular membranes. In some embodiments, a composition comprises a tetrapyrrole photocatalyst, and a protein labeling agent, wherein the tetrapyrrole photocatalyst has electronic structure to activate the protein labeling agent to a reactive intermediate via energy transfer. The reactive intermediate reacts or crosslinks with a protein or other biomolecule within the diffusion radius of the reactive intermediate.

Dependencies are inferred from the claim text.