Covalent and selective immobilization of GST fusion proteins with fluorophosphonate-based probes.

Using GST fusion protein tags is an attractive approach for protein immobilization. Here we report that pyrimidine-based small-molecule probes with a fluorophosphonate reactive group could specifically react with the tyrosine-111 residue of the Schistosoma japonicum GST (sjGST) tag, and these probes could rapidly and site-selectively immobilize sjGST fusion proteins while preserving their activities.