Synthesis and biological evaluation of homoserine lactone derived ureas as antagonists of bacterial quorum sensing.
Bioorg Med Chem 2006;
14:4781-91. [PMID:
16574415 DOI:
10.1016/j.bmc.2006.03.017]
[Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2006] [Revised: 03/01/2006] [Accepted: 03/14/2006] [Indexed: 11/21/2022]
Abstract
A series of 15 racemic alkyl- and aryl-N-substituted ureas, derived from homoserine lactone, were synthesized and tested for their ability to competitively inhibit the action of 3-oxohexanoyl-l-homoserine lactone, the natural inducer of bioluminescence in the bacterium Vibrio fischeri. N-alkyl ureas with an alkyl chain of at least 4 carbon atoms, as well as certain ureas bearing a phenyl group at the extremity of the alkyl chain, were found to be significant antagonists. In the case of N-butyl urea, it has been shown that the antagonist activity was related to the inhibition of the dimerisation of the N-terminal domain of ExpR, a protein of the receptor LuxR family. Molecular modelling suggested that this would result from the formation of an additional hydrogen bond in the protein acylhomoserine lactone binding cavity.
Collapse