Fluorinated Aromatic Amino Acids are Sensitive 19F NMR Probes for Bromodomain-Ligand Interactions.
Related Articles Fluorinated Aromatic Amino Acids are Sensitive 19F NMR Probes for Bromodomain-Ligand Interactions.
ACS Chem Biol. 2014 Oct 7;
Authors: Mishra NK, Urick AK, Ember S, Schonbrunn E, Pomerantz WC
Abstract
We describe a 19F NMR method for detecting bromodomain-ligand interactions using fluorine-labeled aromatic amino acids due to the conservation of aromatic residues in the bromodomain binding site. We test the sensitivity, accuracy, and speed of this method with small molecule ligands (+)-JQ1, BI2536, Dinaciclib, TG101348, and acetaminophen using three bromodomains Brd4, BrdT and BPTF. Simplified 19F NMR spectra allowed for simultaneous testing of multiple bromodomains to assess selectivity and identification of a new BPTF ligand. Fluorine labeling only modestly affected Brd4 structure and function assessed by isothermal titration calorimetry, circular dichroism, and x-ray crystallography. The speed, ease of interpretation, and low concentration of protein needed for binding experiments affords a new method to discover and characterize both native and new ligands.
PMID: 25290579 [PubMed - as supplied by publisher]
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