A fluorescent assay suitable for inhibitor screening and vanin tissue quantification
作者:Benfang H. Ruan、Derek C. Cole、Paul Wu、Amira Quazi、Karen Page、Jill F. Wright、Nelson Huang、Joseph R. Stock、Karl Nocka、Ann Aulabaugh、Rustem Krykbaev、Lori J. Fitz、Neil M. Wolfman、Margaret L. Fleming
DOI:10.1016/j.ab.2009.12.010
日期:2010.4
Vanin-1 is a pantetheinase that catalyzes the hydrolysis of pantetheine to produce pantothenic acid (vitamin B5) and cysteamine. Reported here is a highly sensitive fluorescent assay using a novel fluorescently labeled pantothenate derivative. The assay has been used for characterization of a soluble version of human vanin-1 recombinant protein, identification and characterization of hits from high-throughput screening (HTS), and quantification of vanin pantothenase activity in cell lines and tissues. Under optimized assay conditions, we quantified vanin pantothenase activity in tissue lysate and found low activity in lung and liver but high activity in kidney. We demonstrated that the purified recombinant vanin-1 consisting of the extracellular portion without the glycosylphosphatidylinositol (GPI) linker was highly active with an apparent K-m of 28 mu M for pantothenate-7-amino-4-methylcoumarin (pantothenate-AMC), which was converted to pantothenic acid and AMC based on liquid chromatography-mass spectrometry (LC-MS) analysis. The assay also performed well in a 384-well microplate format under initial rate conditions (10% conversion) with a signal-to-background ratio (S/B) of 7 and a Z factor of 0.75. Preliminary screening of a library of 1280 pharmaceutically active compounds identified inhibitors with novel chemical scaffolds. This assay will be a powerful tool for target validation and drug lead identification and characterization. (C) 2009 Elsevier Inc. All rights reserved.
β-Alanyl aminopeptidase-activated fluorogenic probes for the rapid identification of Pseudomonas aeruginosa in clinical samples
作者:Linda Váradi、David E. Hibbs、Sylvain Orenga、Michèle Babolat、John D. Perry、Paul W. Groundwater
DOI:10.1039/c6ra12875k
日期:——
The fluorogenic self-immolative substrates8are specifically hydrolyzed by β-alanyl aminopeptidase, resulting in a 1,6-elimination and the release of the highly fluorescent hydroxycoumarins6.
荧光自灭底物8特异地被β-丙氨酰氨基肽酶水解,导致1,6-消除并释放高度荧光的羟基香豆素6。
Developing Cyclic Opioid Analogues: Fluorescently Labeled Bioconjugates of Biphalin
作者:Azzurra Stefanucci、Marilisa Pia Dimmito、Gabriela Molnar、John M. Streicher、Ettore Novellino、Gokhan Zengin、Adriano Mollica
DOI:10.1021/acsmedchemlett.9b00569
日期:2020.5.14
pivotal importance in medicinal chemistry due to their potential applications as therapeutic agents to improve the targeting of specific diseases, decrease toxicity, or control drug release. In this work we achieved the synthesis and characterization of three novel opioid peptides fluorescently labeled, analogues of cyclic biphalin derivatives, namely 1D, 1C, and 2C. Among them, compound 1D, containing