1. Probing the Bioactive Constituents from Chemotypes of the Sponge Psammocinia aff. bulbosa
- Author
-
Rob W. M. van Soest, Desiree F. Yee, Joseph E. Media, Frederick A. Valeriote, Karen Tenney, Lizabeth Martinez, Sarah J. Robinson, Phillip Crews, and Research of the Zoological Museum of Amsterdam (ZMA)
- Subjects
Stereochemistry ,Pharmaceutical Science ,Peptide ,Pharmacognosy ,Analytical Chemistry ,Mice ,Papua New Guinea ,Coumarins ,Drug Discovery ,Animals ,Humans ,Nuclear Magnetic Resonance, Biomolecular ,Pyrans ,Pharmacology ,chemistry.chemical_classification ,Chemotype ,biology ,Dose-Response Relationship, Drug ,Molecular Structure ,Organic Chemistry ,Absolute configuration ,Stereoisomerism ,biology.organism_classification ,HCT116 Cells ,Cyclic peptide ,Porifera ,Sponge ,Disease Models, Animal ,Complementary and alternative medicine ,chemistry ,Pyrones ,Molecular Medicine ,Two-dimensional nuclear magnetic resonance spectroscopy ,Lactone - Abstract
Since the report of (+)-psymberin (2) in 2004, many synthetic groups have pursued the synthesis of this compound, and our group has further collected Psammocinia aff. bulbosa to successfully isolate more 2. With more (+)-psymberin (2) in hand, additional clonogenic studies, a therapeutic efficacy assessment, and the hollow fiber assay have been completed. The inconsistent production of (+)-psymberin (2) and the classification of six Psammocinia species are further discussed herein. The most recent of these six collections resulted in the isolation of a new brominated cyclic peptide, (-)-psymbamide A (4), which is the first report of a Psammocinia-derived compound in this peptide class. The planar structure was solved via dereplication with Marinlit, HRESIMS, and 1D and 2D NMR techniques, and the absoluteconfiguration determined using Marfey’s method.
- Published
- 2007