Discovery and Optimization of Sulfonyl Acrylonitriles as Selective, Covalent Inhibitors of Protein Phosphatase Methylesterase-1

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• 作者：Daniel A. Bachovchin ; Andrea M. Zuhl ; Anna E. Speers ; Monique R. Wolfe ; Eranthie Weerapana ; Steven J. Brown ; Hugh Rosen ; Benjamin F. Cravatt
• 刊名：Journal of Medicinal Chemistry
• 出版年：2011
• 出版时间：July 28, 2011
• 年：2011
• 卷：54
• 期：14
• 页码：5229-5236
• 全文大小：957K
• 年卷期：v.54,no.14(July 28, 2011)
• ISSN：1520-4804

文摘

The serine hydrolase protein phosphatase methylesterase-1 (PME-1) regulates the methylesterification state of protein phosphatase 2A (PP2A) and has been implicated in cancer and Alzheimer鈥檚 disease. We recently reported a fluorescence polarization-activity-based protein profiling (fluopol-ABPP) high-throughput screen for PME-1 that uncovered a remarkably potent and selective class of aza-尾-lactam (ABL) PME-1 inhibitors. Here, we describe a distinct set of sulfonyl acrylonitrile inhibitors that also emerged from this screen. The optimized compound, 28 (AMZ30), selectively inactivates PME-1 and reduces the demethylated form of PP2A in living cells. Considering that 28 is structurally unrelated to ABL inhibitors of PME-1, these agents, together, provide a valuable set of pharmacological probes to study the role of methylation in regulating PP2A function. We furthermore observed that several serine hydrolases were sensitive to analogues of 28, suggesting that more extensive structural exploration of the sulfonyl acrylonitrile chemotype may result in useful inhibitors for other members of this large enzyme class.