Using a genetically encoded fluorescent amino acid as a site-specific probe to detect binding of low-molecular-weight compounds
Development of enzyme inhibitors requires an activity assay for the identification of hits and lead compounds. To determine dissociation constants in a straightforward manner, we explored the use of a genetically encoded fluorescent amino acid for site-specific tagging of the target protein. The unnatural amino acid 7-(hydroxy-coumarin-4-yl) ethylglycine (Hco) was site-specifically incorporated in the target protein by cell-free protein synthesis using an orthogonal amber suppressor...[Show more]
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