Homophymamide A, Heterodetic Cyclic Tetrapeptide from a <i>Homophymia</i> sp. Marine Sponge: A Cautionary Note on Configurational Assignment of Peptides That Contain a Ureido Linkage
作者:Daichi Kanki、Shohei Nakamukai、Yusuke Ogura、Hirosato Takikawa、Yuji Ise、Yasuhiro Morii、Nobuhiro Yamawaki、Tomohiro Takatani、Osamu Arakawa、Shigeru Okada、Shigeki Matsunaga
DOI:10.1021/acs.jnatprod.1c00336
日期:2021.6.25
homophymamide A (1), was isolated from a Homophymia sp. marine sponge. The structure of homophymamide A was determined to be a lower homologue of anabaenopeptins by spectroscopic analysis, chemical degradation, and chemical synthesis. Analysis of the acidic hydrolysate showed that the racemization of Lys took place, leading us to pose a cautionary note on the configurational assignment of peptides that contain
以前未报道的杂环肽,homophymamide A ( 1 ),是从Homophymia sp. 中分离出来的。海洋海绵。通过光谱分析、化学降解和化学合成,homophymamide A 的结构被确定为 anabaenopeptins 的较低同系物。酸性水解物的分析表明发生了 Lys 的外消旋化,导致我们对包含脲基键的肽的构型分配提出警告。