Isolation, Structure Determination, and Synthesis of Cyclic Tetraglutamic Acids from Box Jellyfish Species Alatina alata and Chironex yamaguchii
作者:Justin Reinicke、Ryuju Kitatani、Shadi Sedghi Masoud、Kelly Kawabata Galbraith、Wesley Yoshida、Ayako Igarashi、Kazuo Nagasawa、Gideon Berger、Angel Yanagihara、Hiroshi Nagai、F. David Horgen
DOI:10.3390/molecules25040883
日期:——
Chironex yamaguchii by LC-MS for the presence of small molecule metabolites. Three isomeric compounds, cnidarins 4A (1), 4B (2), and 4C (3), were isolated from venom extracts and characterized by NMR and MS, which revealed their planar structure as cyclic γ-linked tetraglutamic acids. The full configurational assignments were established by syntheses of all six possible stereoisomers, comparison of spectral
立方体动物刺丝囊毒液含有已知的溶细胞和溶血蛋白,但以前从未报道过立方体动物毒液中的小分子成分。我们通过 LC-MS 筛选了 Alatina alata 和 Chironex yamaguchii 的线虫囊提取物,以确定是否存在小分子代谢物。从毒液提取物中分离出三种异构化合物,刺胞素 4A (1)、4B (2) 和 4C (3),并通过 NMR 和 MS 对其进行表征,表明它们的平面结构为环状 γ-连接的四谷氨酸。通过合成所有六种可能的立体异构体、光谱数据和旋光度的比较以及衍生降解产物的立体化学分析,建立了完整的构型分配。随后通过 LC-MS 在其他八种刺胞动物的组织中检测到化合物 1-3。这些化合物中含量最多的,