Synthesis of a phosphotyrosyl analogue having χ1, χ2 and φ angles constrained to values observed for an SH2 domain-bound phosphotyrosyl residue
作者:Xiang-Zhu Wang、Zhu-Jun Yao、Hongpeng Liu、Manchao Zhang、Dajun Yang、Clifford George、Terrence R Burke
DOI:10.1016/s0040-4020(03)00978-5
日期:2003.8
5S)-3-acetyl-1,2,3,4,5,6-hexahydro-1-methyl-1,5-methano-3-benzazocin-8-ol, in lacking a methyl substituent at the bridgehead 1-position. Molecular modeling studies had indicated that this methyl group could potentially hinder SH2 domain binding. Synthesis of the desmethyl derivative was achieved by formation of the methanobenzazocine ring system using an intramolecular electrophilic cyclization that proceeds through
Src同源2(SH2)域通过它们与含磷酸酪氨酰(pTyr)的肽序列的高亲和力缔合,在蛋白质-酪氨酸激酶(PTK)依赖性信号传导中提供连通性。因为pTyr残基的识别是SH2域结合亲和力的中心,所以pTyr模拟残基的设计一直是SH2域信号转导拮抗剂发展的一个组成部分。本文报道的是(±)-(rel -1 R,2 R,5 S)-3-乙酰基-1,2,3,4,5,6-六氢-8- O-磷酰基-1,5的合成-亚甲基-3- benzazocine -2-羧酸甲酯(3C),其为单体的pTyr-模拟类似物,其约束条件3的扭转角(χ 1 = 168°; χ2 = -85°;φ 1 = -113°),以近似那些要的pTyr观察级残留物结合到Grb2的SH2结构域(值χ 1 = 182°; χ 2 = -89°; φ 1 = -132°)。化合物3c与我们先前报道的类似物(±)-(rel -1 R,2 R,5 S)-3-乙酰基-1