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  • Title: Conformational studies of free and Li+ complexed jasplakinolide, a cyclic depsipeptide from the Fijian marine sponge Jaspis splendens.
    Author: Tabudravu JN, Morris LA, Milne BF, Jaspars M.
    Journal: Org Biomol Chem; 2005 Mar 07; 3(5):745-9. PubMed ID: 15731859.
    Abstract:
    The complexation of Li+ to jasplakinolide, a marine sponge derived cyclic depsipeptide showed preferential binding to two out of four carbonyl oxygens (C-10, C-14) and the electrons of the aromatic system of the beta-tyrosine amino acid residue. This is in contrast to previous results obtained by others who proposed complexation to three out of four available carbonyl oxygens (C-1, C-10, C-14). The structure of the complex in CD3CN was determined by NOE restrained molecular dynamic calculations. Structures of the uncomplexed jasplakinolide were calculated in CDCl3 and CD3CN for comparison.
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