Preparation of<i>S</i>-Protected Cysteine-Containing Peptide Thioester and Its Use for the Synthesis of the Barnase-Like Domain in DNA-Directed RNA Polymerase II of<i>Saccharomyces cerevisiae</i>
作者:Hironobu Hojo、Shoko Yoshimura、Mitiko Go、Saburo Aimoto
DOI:10.1246/bcsj.68.330
日期:1995.1
The Barnase-like Domain in DNA-Directed RNA Polymerase II of Saccharomyces cerevisiae containing three cysteine residues was synthesized by a thioester method. A partially-protected cysteine-containing peptide thioester was prepared via a peptide obtained by a solid-phase method using 3-nitro-2-pyridinesulfenyl amino acid derivatives. Four peptide segments covering 112 amino acid residues of the barnase-like domain were condensed from the C-terminal to the N-terminal one by one in the presence of silver ions and N-hydroxysuccinimide to give a full sequence peptide. RNase activity of the synthetic domain could not be detected because of its extreme low solubility in the neutral buffer.
通过硫酯法合成了酿酒酵母 DNA 主导 RNA 聚合酶 II 中含有三个半胱氨酸残基的 Barnase-like Domain。通过使用 3-硝基-2-吡啶亚磺酰基氨基酸衍生物的固相方法获得的肽,制备了部分受保护的含半胱氨酸肽硫酯。在银离子和 N-羟基琥珀酰亚胺的作用下,从 C 端到 N 端逐一缩合了涵盖类谷氨酸酶结构域 112 个氨基酸残基的四个肽段,得到了全序列肽。由于合成结构域在中性缓冲液中的溶解度极低,因此无法检测到其 RNase 活性。