Replacement of Ala by Aib improves structuration and biological stability in thymine-based α-nucleopeptides
作者:Piero Geotti-Bianchini、Alessandro Moretto、Cristina Peggion、Julien Beyrath、Alberto Bianco、Fernando Formaggio
DOI:10.1039/b920211k
日期:——
Three thymine-based nucleo-heptapeptides, each containing two nucleo-amino acids and zero, one or four Aib residues, respectively, have been synthesized. A single Aib residue is enough to promote the adoption of a helical structure in our nucleopeptides and to increase significantly their resistance towards enzymatic degradation. The insertion of four Aib residues, out of seven residues in the sequence, affords a rigid, 310-helical nucleopeptide that is substantially unaffected by serum enzymes and is not cytotoxic.
我们合成了三种基于胸腺嘧啶的核七肽,每种核七肽都含有两个核氨基酸以及零、一或四个 Aib 残基。一个 Aib 残基就足以促使我们的核肽采用螺旋结构,并显著提高其抗酶降解的能力。在序列的 7 个残基中插入 4 个 Aib 残基,就能得到一种刚性的 310 螺旋核肽,这种核肽基本上不受血清酶的影响,也没有细胞毒性。