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Engineered production of kitasetalic acid, a new tetrahydro-beta-carboline with the ability to suppress glucose-regulated protein synthesis

机译:工程化生产Kitasetalic acid,一种新的四氢β-蛋白质,具有抑制葡萄糖调节蛋白质合成的能力

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摘要

beta-Carboline alkaloids and related compounds show a broad spectrum of biological activities. We previously identified new members of the beta-carboline alkaloid family by using an engineered Kitasatospora setae strain and a heterologous Streptomyces host expressing the plausible biosynthetic genes, including the hypothetical gene kse_70640 (kslB). Here, we elucidated the chemical structure of a new tetrahydro-beta-carboline compound (named kitasetalic acid) that appeared in a heterologous Streptomyces host expressing the kslB gene alone. Kitasetalic acid suppressed the expression of glucose-regulated protein 78 (GRP78) without inducing cell death. This is the first report to show that a tetrahydro-beta-carboline compound regulates the expression of the GRP78 protein in cancer cell lines.
机译:β-咔啉生物碱和相关化合物显示出广谱的生物活性。 我们以前通过使用工程化的Kitasatospora setae菌株和表达合理的生物合成基因的异源链霉菌宿主来确定β-咔啉生物碱家族的新成员,包括假设基因KSE_70640(KSLB)。 在这里,我们阐明了一种在单独表达KSLB基因的异源链霉菌宿主中出现的新的四氢β-咔啉化合物(命名KINATALIC酸)的化学结构。 Kitasetalic酸抑制了葡萄糖调节蛋白质78(GRP78)的表达而不诱导细胞死亡。 这是第一份表明四氢β-咔啉化合物调节癌细胞系中GRP78蛋白表达的报告。

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