Synthesis and biological evaluation of phosphatidylinositol phosphate affinity probes
作者:Stuart J. Conway、James Gardiner、Simon J. A. Grove、Melloney K. Johns、Ze-Yi Lim、Gavin F. Painter、Diane E. J. E. Robinson、Christine Schieber、Jan W. Thuring、Leon S.-M. Wong、Meng-Xin Yin、Antony W. Burgess、Bruno Catimel、Phillip T. Hawkins、Nicholas T. Ktistakis、Leonard R. Stephens、Andrew B. Holmes
DOI:10.1039/b913399b
日期:——
The synthesis of the complete family of phosphatidylinositol phosphate analogues (PIPs) from five key core intermediates A–E is described. These core compounds were obtained from myo-inositol orthoformate 1via regioselective DIBAL-H and trimethylaluminium-mediated cleavages and a resolution–protection process using camphor acetals 10. Coupling of cores A–E with phosphoramidites 34 and 38, derived from the requisite protected lipid side chains, afforded the fully-protected PIPs. Removal of the remaining protecting groups was achieved via hydrogenolysis using palladium black or palladium hydroxide on carbon in the presence of sodium bicarbonate to afford the complete family of dipalmitoyl- and amino-PIP analogues 42, 45, 50, 51, 58, 59, 67, 68, 76, 77, 82, 83, 92, 93, 99 and 100. Investigations using affinity probes incorporating these compounds have identified novel proteins involved in the PI3K intracellular signalling network and have allowed a comprehensive proteomic analysis of phosphoinositide interacting proteins.
报道了从五个关键的核心中间体A-E合成完整的
磷脂酰肌醇磷酸类似物(
PIPs)家族的方法。这些核心化合物通过选择性D
IBAL-H和
三甲基铝介导的裂解以及使用
樟脑乙缩醛的解析保护过程,从肌醇
原甲酸1中获得。将核心A-E与从所需保护的脂质侧链衍生的
磷酰胺34和38偶联,得到了完全保护的
PIPs。通过使用
钯黑或碳上的
钯氢氧化物在
碳酸氢钠存在下的氢解,去除了剩余的保护基团,得到了完整的
二棕榈酰和
氨基
PIP类似物42、45、50、51、58、59、67、68、76、77、82、83、92、93、99和100。利用包含这些化合物的亲和探针进行的研究,鉴定了参与
PI3K细胞内信号网络的新蛋白,并允许对
磷脂酰肌醇相互作用蛋白进行全面的蛋白质组学分析。