title: A fluorescence lifetime-based binding assay for acetylpolyamine amidohydrolases from Pseudomonas aeruginosa using a [1,3]dioxolo[4,5-f][1,3]benzodioxole (DBD) ligand probe.
abstract: High-throughput assays for drug screening applications have to fulfill particular specifications. Besides the capability to identify even compounds with low potency, one of the major issues is to minimize the number of false-positive hits in a screening campaign in order to reduce the logistic effort for the subsequent cherry picking and confirmation procedure. In this respect, fluorescence lifetime (FLT) appears as an ideal readout parameter that is supposed to be robust against autofluorescent and light-absorbing compounds, the most common source of systematic false positives. The extraordinary fluorescence features of the recently discovered [1,3]dioxolo[4,5-f][1,3] benzodioxole dyes were exploited to develop an FLT-based binding assay with exceptionally robust readout. The assay setup was comprehensively validated and shown to comply not only with all requirements for a powerful high-throughput screening assay but also to be suitable to determine accurate binding constants for inhibitors against enzymes of the histone deacetylase family. Using the described binding assay, the first inhibitors against three members of this enzyme family from Pseudomonas aeruginosa were identified. The compounds were characterized in terms of potency and selectivity profile. The novel ligand probe should also be applicable to other homologues of the histone deacetylase family that are inhibited by N-hydroxy-N'-phenyloctandiamide.
authors.affiliation: Department of Chemical Engineering and Biotechnology, University of Applied Sciences Darmstadt, Schnittspahnstr. 12, 64287, Darmstadt, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Meyners
authors.forename: Robert
authors.initials: R
authors.lastname: Wawrzinek
authors.forename: Andreas
authors.initials: A
authors.lastname: Krämer
authors.forename: Steffen
authors.initials: S
authors.lastname: Hinz
authors.forename: Pablo
authors.initials: P
authors.lastname: Wessig
authors.forename: Franz-Josef
authors.initials: FJ
authors.lastname: Meyer-Almes
mesh_terms: D000619:Aminohydrolases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D001667:Binding, Competitive; D001681:Biological Assay; D004353:Drug Evaluation, Preclinical; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D005453:Fluorescence; D031541:Fluorescence Resonance Energy Transfer; D005456:Fluorescent Dyes / Q000737:chemistry*; D057166:High-Throughput Screening Assays; D007700:Kinetics; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000201:enzymology* / Q000254:growth & development; D000581:Amidohydrolases
chemical_list: D000619:Aminohydrolases; D004791:Enzyme Inhibitors; D005456:Fluorescent Dyes; C058087:acetylpolyamine amidohydrolase; D000581:Amidohydrolases