Download MendeleyGenetically Encoded Quinone Methides Enabling Rapid, Site-Specific, and Photocontrolled Protein Modification with Amine Reagents.
Liu, J., Cheng, R., Van Eps, N., Wang, N., Morizumi, T., Ou, W.L., Klauser, P.C., Rozovsky, S., Ernst, O.P., Wang, L.(2020) J Am Chem Soc 142: 17057-17068
- PubMed: 32915556
- DOI: https://doi.org/10.1021/jacs.0c06820
- Primary Citation of Related Structures:
6V51 - PubMed Abstract:
Site-specific modification of proteins with functional molecules provides powerful tools for researching and engineering proteins. Here we report a new chemical conjugation method which photocages highly reactive but chemically selective moieties, enabling the use of protein-inert amines for selective protein modification. New amino acids FnbY and FmnbY, bearing photocaged quinone methides (QMs), were genetically incorporated into proteins. Upon light activation, they generated highly reactive QM, which rapidly reacted with amine derivatives. This method features a rare combination of desired properties including fast kinetics, small and stable linkage, compatibility with low temperature, photocontrollability, and widely available reagents. Moreover, labeling via FnbY occurs on the β-carbon, affording the shortest linkage to protein backbone which is essential for advanced studies involving orientation and distance. We installed various functionalities onto proteins and attached a spin label as close as possible to the protein backbone, achieving high resolution in double electron-electron paramagnetic resonance distance measurements.
Organizational Affiliation:
Department of Pharmaceutical Chemistry and the Cardiovascular Research Institute, University of California San Francisco, 555 Mission Bay Blvd. South, San Francisco, California 94158, United States.
