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Updated: Jul 19, 2026

Identification of Small Molecule-binding Proteins in a Native Cellular Environment by Live-cell Photoaffinity Labeling
Published on: September 20, 2016
Design of a selective chemical probe for class I PDZ domains
Naoaki Fujii1, Anang Shelat, Randy A Hall
1Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA. naoaki.fujii@stjude.org
Abstract:
Covalent labeling has been widely used for structural and functional analyses of proteins. To target a wide range of PDZ domains, we designed a chemical scaffold mimicking the E/D-T/S-XV peptide, which is a PDZ domain that binds ligands in higher occurrence. A chemical probe (2) that contained this moiety alkylated diverse PDZ domains, including NHERF-1 PDZ2, and differentially visualized the cellular proteome.

