Effect of <i>N</i><sup>α</sup>-Acyl Chain Length on the Membrane-Modifying Properties of Synthetic Analogs of the Lipopeptaibol Trichogin GA IV
作者:C. Toniolo、M. Crisma、F. Formaggio、C. Peggion、V. Monaco、C. Goulard、S. Rebuffat、B. Bodo
DOI:10.1021/ja954081o
日期:1996.1.1
11-residue lipopeptaibol blocked at the N-terminus by an n-octanoyl group and at the C-terminus by a 1,2-amino alcohol (l-leucinol), extracted from the fungus Trichoderma longibrachiatum, exhibits remarkable membrane-modifying properties. We have synthesized trichogin GA IV and several [l-Leu-OMe11] analogs carrying at the N-terminus an acyl chain of variable length (C2−C8, C10, C12, C14, C16, C18). A succinoylated
Trichogin GA IV 是一种在 N 端被正辛酰基封闭,在 C 端被 1,2-氨基醇(l-亮氨醇)封闭的 11 个残基脂肽醇,从真菌 Trichoderma longibrachiatum 中提取,表现出显着的效果膜改性特性。我们已经合成了 Trichogin GA IV 和几种 [l-Leu-OMe11] 类似物,在 N 端带有可变长度的酰基链(C2-C8、C10、C12、C14、C16、C18)。还制备了琥珀酰化的头对头二聚体。通过 FTIR 吸收、CD 和 NMR 进行的构象分析表明,天然 lipopeptaibol 的右手螺旋结构基本上保留在其所有类似物中。渗透性测量表明,Nα 阻断脂肪酰基部分中至少有六个碳原子是显着的膜改性特性的开始所必需的。此外,头对头二聚体非常活跃。讨论了 Trichogin GA IV 的膜通透性机制的可能模型。