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Wang, Xiachang; Reynolds, Anna R; Elshahawi, Sherif I; Shaaban, Khaled A; Ponomareva, Larissa V; Saunders, Meredith A; Elgumati, Ibrahim S; Zhang, Yinan; Copley, Gregory C; Hower, James C; Sunkara, Manjula; Morris, Andrew J; Kharel, Madan K; Van Lanen, Steven G; Prendergast, Mark A; Thorson, Jon S
Organic letters, 06/2015, Letnik: 17, Številka: 11Journal Article
Terfestatins B (1) and C (2), new p-terphenyls bearing a novel unsaturated hexuronic acid (4-deoxy-α-l-threo-hex-4-enopyranuronate), a unique β-d-glycosyl ester of 5-isoprenylindole-3-carboxylate (3) and the same rare sugar, and two new hygromycin precursors, were characterized as metabolites of the coal mine fire isolate Streptomyces sp. RM-5–8. EtOH damage neuroprotection assays using rat hippocampal-derived primary cell cultures with 1, 2, 3 and echoside B (a terfestatin C-3′-β-d-glucuronide from Streptomyces sp. RM-5–8) revealed 1 as potently neuroprotective, highlighting a new potential application of the terfestatin scaffold.
