Synthesis and PTP Inhibitory Activity of Illudalic Acid and Its Methyl Ether, with Insights into Selectivity for LAR PTP over Other Tyrosine Phosphatases under Physiologically Relevant Conditions
作者:Brandon S. McCullough、Paratchata Batsomboon、Kacey B. Hutchinson、Gregory B. Dudley、Amy M. Barrios
DOI:10.1021/acs.jnatprod.9b00663
日期:2019.12.27
includes many attractive therapeutic targets, such as those in the leukocyte common antigen-related (LAR) subfamily of receptor PTPs. Synthesis and PTP inhibitory activity of illudalic acid and its methyl ether are described, with a focus on selective inhibition of LAR PTP relative to a small collection of other representative PTPs. The synthesis comprises 16 steps and provides illudalic acid in up to
蛋白质酪氨酸磷酸酶(PTP)酶家族包括许多有吸引力的治疗靶标,例如受体PTP的白细胞常见抗原相关(LAR)亚家族中的靶标。描述了乙二酸及其甲基醚的合成和PTP抑制活性,重点是相对于少量其他代表性PTP选择性抑制LAR PTP。合成过程包括16个步骤,并从新戊烯基稠合的苯甲酸酯1(购自商业原料的20个步骤)中提供了高达12%的总产率的杜鹃酸。与以前的共价结合报道相一致,异丁酸的剂量依赖性(测得的IC50 = 2.1±0.2μM)和时间依赖性抑制LAR。杜鹃酸对LAR的抑制动力学与两步机制一致,其中抑制剂和酶首先非共价相互作用(KI = 130±50μM),然后以kinact = 1.3±0.4 min-1的速率共价连接。如本文所讨论的,运动/ KI之比104对应于0.5分钟的∞1/2。在我们的剂量反应分析中,发现伊达酸的酚甲基醚效力较低(测得的IC50 = 55±6μM),但对LAR的选择性