Development of a Linker with an Enhanced Stability for the Preparation of Peptide Thioesters and Its Application to the Synthesis of a Stable-Isotope-Labelled HU-Type DNA-Binding Protein
作者:Hironobu Hojo、Yeondae Kwon、Yoshimitsu Kakuta、Sakae Tsuda、Isao Tanaka、Kunio Hikichi、Saburo Aimoto
DOI:10.1246/bcsj.66.2700
日期:1993.9
An S-alkyl-thioester-moiety-containing linker with an enhanced stability on a resin has been developed. A linker containing S-alkyl thioester with a spacer group, –CO–SC(CH3)2CH2CO–Nle–, was stable during the peptide chain elongation cycle. This thioester was stable under HF treatment conditions, and was rapidly activated by silver ions in the presence of N-hydroxysuccinimde (HONSu) to form a peptide bond. Using this linker, peptide segments covering the HU-type DNA-binding protein of Bacillus stearothermophilus (HBs), which was site-specifically labelled with 2H, 13C, and 15N, were prepared. Using these peptide segments, multi-labelled HBs was synthesized. Distinct signals of 2H, 13C, and 15N in HBs were detected by NMR spectrometry.
已开发一种含有S-烷基硫酯基团的连接剂,该连接剂在树脂上的稳定性增强。该连接剂含有S-烷基硫酯及间隔基团 –CO–SC(CH3)2CH2CO–Nle–,在肽链延长周期中表现出稳定性。该硫酯在HF处理条件下稳定,并在N-羟基琥珀酰亚胺(HONSu)存在下被银离子迅速激活以形成肽键。利用该连接剂,制备了覆盖细菌杆菌(Bacillus stearothermophilus)HU型DNA结合蛋白(HBs)的肽段,并对其进行了特定标记,标记元素包括2H、13C和15N。利用这些肽段合成了多标记的HBs。通过核磁共振(NMR)光谱检测到了HBs中2H、13C和15N的明显信号。