Replacing proline at the apex of heptapeptide-based chloride ion transporters alters their properties and their ionophoretic efficacy
作者:Paul H. Schlesinger、Riccardo Ferdani、Jolanta Pajewska、Robert Pajewski、George W. Gokel
DOI:10.1039/b206570n
日期:2003.1.8
A membrane anchored heptapeptide, (C18H37)2NHCOCH2OCH2CO–NH–Gly–Gly–Gly–Pro–Gly–Gly–Gly–OCH2Ph, has proved to be a selective chloride anion transporter that functions in phospholipid bilayer membranes. When Pro was replaced by the natural amino acid Leu, the activity decreased dramatically. In the present study, Pro is replaced by pipecolic acid (homoproline, Pip); the resulting anchored heptapeptide is a membrane active, chloride selective transporter.
一种锚定在膜上的七肽(C18H37)2NHCOCH2OCH2CO–NH–Gly–Gly–Gly–Pro–Gly–Gly–Gly–OCH2Ph已被证明是一种选择性氯阴离子转运体,能够在磷脂双层膜中发挥作用。当Pro被天然氨基酸Leu替换时,活性显著降低。在本研究中,Pro被哌嗪酸(同脯氨酸,Pip)替换,所得到的锚定七肽是一种膜活性的氯选择性转运体。