Artificial Chloride-Selective Channel: Shape and Function Mimic of the ClC Channel Selective Pore
作者:Wen-Long Huang、Xu-Dong Wang、Yu-Fei Ao、Qi-Qiang Wang、De-Xian Wang
DOI:10.1021/jacs.0c02881
日期:2020.8.5
An artificial channel molecule 1 that mimics the shape and function of the ClC channel selective pore was described. To facilitate the transport of chloride along a unimolecular pathway, anion-π interactions were introduced as the noncovalent driving force. The hourglass-like shape of 1 was constructed with 1,3-alternate tetraoxacalix[2]arene[2]triazine as the narrowest (central) unit. Two diglycolamine-linked
描述了模拟 ClC 通道选择性孔的形状和功能的人工通道分子 1。为了促进氯沿单分子途径的运输,引入阴离子-π相互作用作为非共价驱动力。1 的沙漏状形状由 1,3-交替四氧嘧啶 [2] 芳烃 [2] 三嗪作为最窄(中心)单元构成。两个二甘醇胺连接的酰亚胺臂被拴系作为延伸部分,苯丙氨酸部分被固定作为末端锚定基团。通过囊泡和平面双层电导技术 (BLM) 的组合检查离子传输活性。囊泡上的荧光分析表明 1 是一种高效的氯离子转运蛋白,具有高活性(EC50 = 1.50 μM;1:lipid = 1:89)。BLM 测量证实了离子通道特性,在对称 KCl 溶液(顺式/反式 = 1.0 M/1.0 M)中显示平均电导为 20.8±1.0 pS。阴离子/阳离子选择性在不对称 KCl 溶液中的渗透率比 PCl-/PK+ = 1.90(顺式/反式 = 1.0 M/0.25 M)和阴离子/阴离子选择性与 PCl-/PBr-