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Identification of Tripeptides Recognized by the PDZ Domain of Dishevelled

Overview
Journal Bioorg Med Chem
Specialties Biochemistry
Chemistry
Date 2009 Jan 23
PMID 19157887
Citations 12
Authors
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Abstract

The development of inhibitors of Dishevelled (Dvl) PDZ protein-protein interactions attracts attention due to a possible application in drug discovery and development. Using nuclear magnetic resonance (NMR) spectroscopy, we found that a tripeptide VVV binds to the PDZ domain of Dvl, which is a key component involved in Wnt signaling. Using a computational approach calculating the binding free energy of the complexes of the Dvl PDZ domain and each of the tripeptides VXV (X: any amino acid residue except Pro), we found that a tripeptide VWV had the highest binding affinity. Consistent with the computational result, experimental results showed that the binding of the tripeptide VWV to the Dvl PDZ domain was stronger than that of the tripeptide VVV. The binding affinity of the tripeptide VWV was comparable to that of the organic molecule NSC668036, which was the first identified Dvl PDZ inhibitor. The three-dimensional structure of the complex Dvl1 PDZ/VWV was determined to investigate the role of the energetically favorable W(-1) residue in binding. These interactions were also explored by using molecular dynamic simulation and the molecular mechanics Poisson-Boltzmann surface area method. Taken together, these two tripeptides may be used as modulators of Wnt signaling or as a scaffold to optimize an antagonist for targeting Dvl1 PDZ protein-protein interaction.

Citing Articles

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Discovery of Potent Disheveled/Dvl Inhibitors Using Virtual Screening Optimized With NMR-Based Docking Performance Index.

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