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TrichormamidesA and B with Antiproliferative Activityfrom the Cultured Freshwater Cyanobacterium Trichormus sp. UIC 10339

机译:滴虫酰胺具有抗增殖活性的A和B从培养的淡水蓝藻Trichormus sp。 UIC 10339

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摘要

Two new cyclic lipopeptides, trichormamides A (>1) and B (>2), were isolated from the cultured freshwater cyanobacterium Trichormus sp. UIC 10339. The strain was obtained from a sample collected in Raven Lake in Northern Wisconsin. The planar structures of trichormamides A (>1) and B (>2) were determined using a combination of spectroscopic analyses including HRESIMS and 1D and 2D NMR experiments. The absolute configurations of the amino acid residues were assigned by the advanced Marfey’s method after acid hydrolysis. Trichormamide A (>1) is a cyclic undecapeptide containing two d-amino acid residues (d-Tyr and d-Leu) and one β-amino acid residue (β-aminodecanoic acid). Trichormamide B (>2) is a cyclic dodecapeptide characterized by the presence of four nonstandard α-amino acid residues (homoserine, N-methylisoleucine, and two 3-hydroxyleucines) and one β-amino acid residue (β-aminodecanoic acid). Trichormamide B (>2) was cytotoxic against MDA-MB-435 and HT-29 cancer cell lines with IC50 values of 0.8 and1.5 μM, respectively.
机译:从培养的淡水蓝藻Trichormus sp。中分离出两个新的环状脂肽,三酰胺A(> 1 )和B(> 2 )。 UIC10339。该菌株是从威斯康星州北部Raven Lake收集的样品中获得的。使用包括HRESIMS在内的光谱分析以及1D和2D NMR实验的组合,确定了三氯酰胺A(> 1 )和B(> 2 )的平面结构。酸水解后,氨基酸残基的绝对构型通过先进的Marfey方法确定。 Trichormamide A(> 1 )是一种环状十一肽,包含两个d-氨基酸残基(d-Tyr和d-Leu)和一个β-氨基酸残基(β-氨基癸酸)。 Trichormamide B(> 2 )是一种环状十二肽,其特征在于存在四个非标准α-氨基酸残基(高丝氨酸,N-甲基异亮氨酸和两个3-羟基亮氨酸)和一个β-氨基酸残基(β -氨基癸酸)。 Trichormamide B(> 2 )对MDA-MB-435和HT-29癌细胞系具有细胞毒性,IC50值为0.8,分别为1.5μM。

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