Targeting Protein–Protein Interactions of Tyrosine Phosphatases with Microarrayed Fragment Libraries Displayed on Phosphopeptide Substrate Scaffolds
作者:Megan Hogan、Medhanit Bahta、Kohei Tsuji、Trung X. Nguyen、Scott Cherry、George T. Lountos、Joseph E. Tropea、Bryan M. Zhao、Xue Zhi Zhao、David S. Waugh、Terrence R. Burke、Robert G. Ulrich
DOI:10.1021/acscombsci.8b00122
日期:2019.3.11
derivatized peptide library was printed in microarrays on nitrocellulose-coated glass surfaces for assessment of PTPase catalytic activity or on gold monolayers for analysis of kinetic interactions by surface plasmon resonance (SPR). Focusing on amino acid positions and chemical features, we first analyzed dephosphorylation of the peptide pTyr residues within the microarrayed library by the human dual-specificity
strains, especially ethoxycarbonyl IDO (0.25–0.5 μg/mL) and hydroxyethyl IDO (0.25–1 μg/mL) exhibited much superior antibacterial efficacies to reference drug norfloxacin. These highly active IDOs also displayed low hemolysis, cytotoxicity and resistance, as well as rapid bactericidal capacity. Further investigations indicated that ethoxycarbonyl IDO and hydroxyethyl IDO could effectively reduce the exopolysaccharide
indolylcyanoenones was exploited as new structural antibacterial frameworks to combat intractable bacterial resistance. Bioactive assessment discovered that 4-chlorobenzyl derivative 11f showed a prominent inhibition on Pseudomonas aeruginosa ATCC 27853 with a low MIC of 1 μg/mL, which was four-fold more effective than norfloxacin. Importantly, the highly active 11f with inconspicuous hemolysis towards human