Herbimycins D-F, ansamycin analogues from Streptomyces sp. RM-7-15.

Herbimycins D-F, ansamycin analogues from Streptomyces sp. RM-7-15.
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来自链霉菌链球菌的Ansamycin类似物的Herbimycins D-F。 RM-7-15。

DOI:
10.1021/np400308w
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发表时间:
2013-09-27
影响因子:
5.1
通讯作者:
Thorson JS
Thorson JS
中科院分区:
生物学2区
文献类型:
--
作者:
Shaaban KA;Wang X;Elshahawi SI;Ponomareva LV;Sunkara M;Copley GC;Hower JC;Morris AJ;Kharel MK;Thorson JS

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属于放线菌纲的细菌菌株是从Ruth Mullins煤火(东肯塔基州的阿巴拉契亚山脉)的热通风口附近的土壤中分离的。来自其中一个分离株(链霉菌属RM-7-15)的代谢物的高分辨率电喷雾电离质谱(HR-ESI-MS)和紫外(UV)吸收谱显示存在一组独特的代谢物,最终确定为除草霉素D-F(1-3)。此外,从链霉菌RM-7-15的粗提物中分离出除莠霉素A(4)、二氢除莠霉素A(TAN 420 E)(7)和结构不同的抗生素双环霉素。Herbimycins A、D-F(1-3)与Hsp 90 α的结合亲和力相当。虽然发现新的类似物在癌细胞毒性和抗微生物测定中无活性,但它们可能在基于安莎霉素的无毒Hsp 90抑制剂用于治疗神经退行性疾病的背景下提供新的见解。
Bacterial strains belonging to the class actinomycetes were isolated from the soil near a thermal vent of the Ruth Mullins coal fire (Appalachian mountains of Eastern Kentucky). High resolution electrospray ionization mass spectrometry (HR-ESI-MS) and ultraviolet (UV) absorption profiles of metabolites from one of the isolates (Streptomyces sp. RM-7-15) revealed the presence of a unique set of metabolites ultimately determined to be herbimycins D-F (1–3). In addition, herbimycin A (4), dihydroherbimycin A (TAN 420E) (7), and the structurally distinct antibiotic bicycylomycin were isolated from the crude extract of Streptomyces sp. RM-7-15. Herbimycins A, D-F (1–3) displayed comparable binding affinities to the Hsp90α. While the new analogues were found to be inactive in cancer cell cytotoxicity and antimicrobial assays, they may offer new insights in the context of non-toxic ansamycin-based Hsp90 inhibitors for the treatment of neurodegenerative disease.
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