Structure–activity relationships and enzyme inhibition of pantothenamide-type pantothenate kinase inhibitors
摘要:
A set of novel pantothenamide-type analogues of the known Staphylococcus aureus pantothenate kinase (SaPanK) inhibitors, N-pentyl, and N-heptylpantothenamide, was synthesized in three series. The first series of analogues (1-3) were designed as molecular probes of the PanK binding site to elucidate important structure-activity relationships (SAR). The second series of analogues (4-16) were designed using Structural information obtained from the Escherichia coli PanK (EcPanK) Structure by targeting the pantothenate binding site and the adjacent phenylalanine-lined lipophilic pocket. Insight into the antimicrobial effect of N-pen- tylpantothenamide (N5-Pan) through its Conversion to the antimetabolite ethyldethia-CoA and further incorporation into all inactive acyl carrier protein analogue drove the development of the third series of analogues (17-25) to enhance this effect using substrate-like substitutions. Each of the analogues was screened for enzyme inhibition activity against a panel of pantothenate kinases consisting of EcPanK, Aspergillus nidulans (AnPanK), SaPanK, and the murine isoform (MmPanK1 alpha). Series 1 demonstrated only modest inhibitory activity, but did reveal some important SAR findings including stereospecific binding. Series 2 demonstrated a much higher inhibition rate for the entire series and significant inhibition was seen with analogues containing alkyl substituents. Series 3 demonstrated the most preferential inhibition profile, with the highest inhibitory activity against the SaPanK greater selectivity. The overall activity data from these analogues Suggest a complex and non-enzynie specific SAR for pantotheriamide substrate/inhibitors of the different PanK enzymes. (c) 2005 Elsevier Ltd. All rights reserved.
Development of a method for the parallel synthesis and purification of N-substituted pantothenamides, known inhibitors of coenzyme A biosynthesis and utilization
作者:Marianne van Wyk、Erick Strauss
DOI:10.1039/b811086g
日期:——
analogues which have been shown to act as inhibitors of coenzyme A biosynthesis and utilization, especially by blocking fatty acid metabolism through formation of inactive acyl carrier proteins. To fully explore the chemical diversity and inhibitory potential of these analogues we have developed a simple method for the parallel synthesis and purification of any number of pantothenamides from a single precursor