Evolved Diversification of a Modular Natural Product Pathway: Apratoxins F and G, Two Cytotoxic Cyclic Depsipeptides from a Palmyra Collection of Lyngbya bouillonii
作者:Kevin Tidgewell、Niclas Engene、Tara Byrum、Joseph Media、Takayuki Doi、Fred A. Valeriote、William H. Gerwick
DOI:10.1002/cbic.201000070
日期:——
Tropical cytotoxin: A collection of LyngbyabouilloniifromPalmyra Atoll in the Central Pacific, a site several thousand kilometers distant from all previous collections of this chemically prolific species of cyanobacterium, was found to contain two new cancer cell cytotoxins of the apratoxin family.
Friomaramide, a Highly Modified Linear Hexapeptide from an Antarctic Sponge, Inhibits <i>Plasmodium falciparum</i> Liver-Stage Development
作者:Matthew A. Knestrick、Nerida G. Wilson、Alison Roth、John H. Adams、Bill J. Baker
DOI:10.1021/acs.jnatprod.9b00362
日期:2019.8.23
The cold waters of Antarctica are known to harbor a rich biodiversity. Our continuing interest in the chemical analysis of Antarctic invertebrates has resulted in the isolation of friomaramide (1), a new, highly modified hexapeptide, from the Antarctic sponge Inflatella coelosphaeroides. The structure of friomaramide was determined using spectroscopic methods and its configuration established by Marfeys method. Friomaramide, which bears the unusual permethylation of the amino acid backbone and is the longest polypeptide bearing a tryptenamine C-terminus, blocks >90% of Plasmodium falciparum liver-stage parasite development at 6.1 mu M.