C-Terminal properties are important for ring-fused 2-pyridones that interfere with the chaperone function in uropathogenic E. coli (original) (raw)
* Corresponding authors
a Organic Chemistry, Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden
E-mail: fredrik.almqvist@chem.umu.se
b Molecular Microbiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110, USA
Abstract
Virulence-associated organelles, termed pili or fimbriae, are assembled via the highly conserved chaperone–usher pathway in a vast number of pathogenic bacteria. Substituted bicyclic 2-pyridones, pilicides, inhibit pilus formation, possibly by interfering with the active site residues Arg8 and Lys112 of chaperones in uropathogenic E. coli. In this article we describe the synthesis and evaluation of nine analogues of a biologically active pilicide. Derivatization was performed with respect to its C-terminal features and the affinities for the chaperone PapD were studied with 1H relaxation-edited NMR spectroscopy. It could be concluded that the carboxylic acid functionality and also its spatial location was important for binding. In all cases, binding was significantly reduced or even abolished when the carboxylic acid was replaced by other substituents. In addition, in vivo results from a hemagglutination assay are presented where the derivatives have been evaluated for their ability to inhibit pilus formation in uropathogenic E. coli.
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Article information
DOI
https://doi.org/10.1039/B509376G
Article type
Paper
Submitted
04 Jul 2005
Accepted
08 Aug 2005
First published
05 Sep 2005
Download Citation
Org. Biomol. Chem., 2005,3, 3886-3892
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C-Terminal properties are important for ring-fused 2-pyridones that interfere with the chaperone function in uropathogenic E. coli
V. Åberg, M. Hedenström, J. S. Pinkner, S. J. Hultgren and F. Almqvist,Org. Biomol. Chem., 2005, 3, 3886DOI: 10.1039/B509376G
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