A Universal Chemical Method for Rational Design of Protein-Based Nanoreactors*.

Self-assembly of a monomeric protease to form a multi-subunit protein complex "proteasome" enables targeted protein degradation in living cells. Naturally occurring proteasomes serve as an inspiration and blueprint for the design of artificial protein-based nanoreactors. Here we disclose a general chemical strategy for the design of proteasome-like nanoreactors. Micelle-assisted protein labeling (MAPLab) technology along with the N-terminal bioconjugation strategy is utilized for the synthesis of a well-defined monodisperse self-assembling semi-synthetic protease. The designed protein is programmed to self-assemble into a proteasome-like nanostructure which preserves the functional properties of native protease.