from a marine cyanobacterium, demonstrates potent cytotoxicity against cancer cell lines by a unique mechanism. A lactam analogue of apratoxin A, named as amidapratoxin A, was efficiently synthesized over 22 linear steps in 2.1% overall yield for the first time. The further conformation analysis was conducted by NMR techniques and computer-based molecular modeling. The results showed that the orientation
                                    从海洋蓝细菌中分离出来的环二肽Apratoxin A通过独特的机理显示出对癌
细胞系的有效细胞毒性。首次以22%的线性步骤高效合成了Apratoxin A的内酰胺类似物,称为amidapratoxinA。通过NMR技术和基于计算机的分子模型进行进一步的构象分析。结果表明,在苯环中
酪氨酸部分的定向,异
异亮氨酸部分的丁基和Ahtmna部分的羟基与Apratoxin A完全不同,这可能导致细胞毒性显着降低。虽然正在进行进一步的研究,但这些结果使对甲毒素家族成员的构象-活性关系的了解增加了,这是对结构-活性关系的重要补充。