Download MendeleyCrystallographic Study of Inhibitors of tRNA-guanine Transglycosylase Suggests a New Structure-based Pharmacophore for Virtual Screening.
Brenk, R., Meyer, E., Reuter, K., Stubbs, M.T., Garcia, G.A., Diederich, F., Klebe, G.(2004) J Mol Biol 338: 55-75
- PubMed: 15050823
- DOI: https://doi.org/10.1016/j.jmb.2004.02.019
- Primary Citation of Related Structures:
1Q4W, 1Q63, 1Q65, 1Q66, 1R5Y - PubMed Abstract:
The enzyme tRNA-guanine transglycosylase (TGT) is involved in the pathogenicity of Shigellae. As the crystal structure of this protein is known, it is a putative target for the structure-based design of inhibitors. Here we report a crystallographic study of several new ligands exhibiting a 2,6-diamino-3H-quinazolin-4-one scaffold, which has been shown recently to be a promising template for TGT-inhibitors. Crystal structure analysis of these complexes has revealed an unexpected movement of the side-chain of Asp102. A detailed analysis of the water network disrupted by this rotation has lead to the derivation of a new composite pharmacophore. A virtual screening has been performed based on this pharmacophore hypothesis and several new inhibitors of micromolar binding affinity with new skeletons have been discovered.
Organizational Affiliation:
Institut für Pharmazeutische Chemie, Philipps-Universität Marburg, Marbacher Weg 6, 35032 Marburg, Germany.
