Recognition of Polarized Lipid Bilayers by <i>p</i>-Oligophenyl Ion Channels: From Push−Pull Rods to Push−Pull Barrels
作者:Naomi Sakai、Stefan Matile
DOI:10.1021/ja017497c
日期:2002.2.1
concentrations of push-pull rod 1 are found to suffice to selectively form ion channels in polarized spherical bilayer membranes composed of egg yolk phosphatidylcholine. Exponential dependence of the ion-channel activity on membrane polarization reveals a gating charge of 0.85/channel. Independence of the activity of push-push rod 2 on membrane potential demonstrates that cell membrane recognition originates
14-甲氧基-84-甲基磺酰基-22,33,42,53,62,73-hexa(Gla-Leu-Lys-Leu-NH2)-p-octiphenyl (1) 和 14,84 的设计、合成和评估描述了-双甲氧基-22,33,42,53,62,73-六(Gla-Leu-Lys-Leu-NH2)-对辛苯基(2)(Gla=-OCH2CO-)。发现推拉杆 1 的纳摩尔浓度足以在由蛋黄磷脂酰胆碱组成的极化球形双层膜中选择性地形成离子通道。离子通道活性对膜极化的指数依赖性显示门控电荷为 0.85/通道。推拉杆 2 的活性对膜电位的独立性表明细胞膜识别起源于推拉杆 1 中的轴向偶极子。