Solution Conformation of a Potent Cyclic Analogue of Tuftsin: Low- Temperature Nuclear Magnetic Resonance Study in a Cryoprotective Mixture
作者:Annamaria D‘Ursi、Stefania Albrizio、Caterina Fattorusso、Antonio Lavecchia、Giancarlo Zanotti、Piero A. Temussi
DOI:10.1021/jm980442+
日期:1999.5.1
peptide. Here we present a conformational study of c-[T-K-P-R-G] based on NMR data in a cryoprotective DMSO/water mixture. The preferred conformation is a type VIa turn centered on the K-P residues. The orientation of the side chains of the two basic residues (K and R) may represent the essential feature of the bioactive conformation of tuftsin. A possible role of tuftsin as a DNA binding motif is suggested
Tuftsin是一种线性四肽(Thr-Lys-Pro-Arg),对应于白细胞分裂素重链的289-292序列,由于其众多的生物学活性和产生新的抗癌药的可能性。环状塔夫辛类似物c- [TKPRG]的生物活性比亲本线性肽高50倍。在这里,我们基于防冻DMSO /水混合物中的NMR数据,对c- [TKPRG]进行了构象研究。优选的构象是以KP残基为中心的VIa型转角。两个基本残基(K和R)的侧链的方向可能代表了簇蛋白的生物活性构象的基本特征。