Isolation, structural elucidation, and synthesis of RA-XVII, a novel bicyclic hexapeptide from Rubia cordifolia, and the effect of side chain at residue 1 upon the conformation and cytotoxic activity
作者:Yukio Hitotsuyanagi、Hiroshi Ishikawa、Tomoyo Hasuda、Koichi Takeya
DOI:10.1016/j.tetlet.2003.11.112
日期:2004.1
A novel antitumor bicyclic hexapeptide RA-XVII was isolated from the roots of Rubia cordifolia. By spectral studies and synthetic approach, its structure was determined to be [D-2-aminobutyric acid-1]deoxybouvardin. Studies on the effect of side chain at residue 1 on cytotoxic activity and conformation showed that although it had little effect on the conformation of the molecule, it decreased the activity
从茜草的根中分离到一种新的抗肿瘤双环六肽RA-XVII 。通过光谱研究和合成方法,确定其结构为[D-2-氨基丁酸-1]脱氧布瓦丁。关于残基1的侧链对细胞毒性活性和构象影响的研究表明,尽管它对分子构象影响很小,但随着其增长,其活性降低。