Braun, Stephan and Botzki, Alexander and Salmen, Sunnhild and Textor, Christian and Bernhardt, Günther and Dove, Stefan and Buschauer, Armin (2011) Design of benzimidazole- and benzoxazole-2-thione derivatives as inhibitors of bacterial hyaluronan lyase. European Journal of Medicinal Chemistry 46 (9), pp. 4419-4429.
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Bacterial hyaluronan lyases (Hyal) degrade hyaluronan, an important component of the extracellular matrix, and are involved in microbial spread. Hyal inhibitors may serve as tools to study the role of the enzyme, its substrates and products in the course of bacterial infections. Moreover, such enzyme inhibitors are potential candidates for antibacterial combination therapy. Based on crystal structures of Streptococcus pneumoniae Hyal in complex with a hexasaccharide substrate and with different inhibitors, 1-acylated benzimidazole-2-thiones and benzoxazole-2-thiones were derived as new leads for the inhibition of Streptococcus agalactiae strain 4755 Hyal. Structure-based optimization led to N-(3-phenylpropionyl)benzoxazole-2-thione, one of the most potent compounds known to date (IC(50) values: 24 μM at pH 7.4, 15 μM at pH 5). Among the 27 new derivatives, other N-acylated benzimidazoles and benzoxazoles are just as active at pH 7.4, but not at pH 5. The results support a binding mode characterized by interactions with residues in the catalytic site and with a hydrophobic patch.
|Date:||19 July 2011|
|Institutions:||Chemistry and Pharmacy > Institute of Pharmacy > Pharmaceutical/Medicinal Chemistry II (Prof. Buschauer)|
|Projects:||GRK 760, Graduiertenkolleg Medizinische Chemie|
|Keywords:||Hyaluronan lyase inhibitors; Streptococcus agalactiae; Structure-based design; Benzimidazole-2-thiones; Benzoxazole-2-thiones|
|Subjects:||500 Science > 570 Life sciences|
500 Science > 540 Chemistry & allied sciences
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Owner:||Prof. Armin Buschauer|
|Deposited On:||12 Aug 2011 07:30|
|Last Modified:||18 Nov 2013 13:53|