Highly Stable,Amide‐Bridged Autoinducing Peptide Analogues that Strongly Inhibit the AgrC Quorum Sensing Receptor in Staphylococcus aureus |
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| Authors: | Prof?Dr Yftah Tal‐Gan Dr Monika Ivancic Dr Gabriel Cornilescu Tian Yang Prof?Dr Helen E Blackwell |
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| Affiliation: | 1. Department of Chemistry, University of Wisconsin-Madison, Madison, WI, USA;2. Current address: Department of Chemistry, University of Nevada, Reno, Reno, NV, USA;3. Current address: Department of Chemistry, University of Vermont, Burlington, VT, USA;4. National Magnetic Resonance Facility, University of Wisconsin-Madison, Madison, WI, USA |
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| Abstract: | Blocking quorum sensing (QS) pathways has attracted considerable interest as an approach to suppress virulence in bacterial pathogens. Toward this goal, we recently developed analogues of a native autoinducing peptide (AIP‐III) signal that can inhibit AgrC‐type QS receptors and attenuate virulence phenotypes in Staphylococcus aureus. Application of these compounds is limited, however, as they contain hydrolytically unstable thioester linkages and have only low aqueous solubilities. Herein, we report amide‐linked AIP analogues with greatly enhanced hydrolytic stabilities and solubilities relative to our prior analogues, whilst maintaining strong potencies as AgrC receptor inhibitors in S. aureus. These compounds represent powerful tools for the study of QS. |
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| Keywords: | autoinducing peptides cyclic peptides quorum sensing Staphylococcus aureus virulence |
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