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Structure Determination, Functional Characterization, and Biosynthetic Implications of Nybomycin Metabolites from a Mining Reclamation Site-Associated Streptomyces.
Journal of Natural Products ( IF 5.1 ) Pub Date : 2019-12-13 , DOI: 10.1021/acs.jnatprod.9b01015
Xiachang Wang 1 , Sherif I Elshahawi 2 , Larissa V Ponomareva , Qing Ye 3 , Yang Liu , Gregory C Copley 4 , James C Hower 4 , Bruce E Hatcher 5 , Madan K Kharel 6 , Steven G Van Lanen , Qing-Bai She 3 , S Randal Voss , Jon S Thorson , Khaled A Shaaban
Affiliation  

We report the isolation and characterization of three new nybomycins (nybomycins B-D, 1-3) and six known compounds (nybomycin, 4; deoxynyboquinone, 5; α-rubromycin, 6; β-rubromycin, 7; γ-rubromycin, 8; and [2α(1E,3E),4β]-2-(1,3-pentadienyl)-4-piperidinol, 9) from the Rock Creek (McCreary County, KY) underground coal mine acid reclamation site isolate Streptomyces sp. AD-3-6. Nybomycin D (3) and deoxynyboquinone (5) displayed moderate (3) to potent (5) cancer cell line cytotoxicity and displayed weak to moderate anti-Gram-(+) bacterial activity, whereas rubromycins 6-8 displayed little to no cancer cell line cytotoxicity but moderate to potent anti-Gram-(+) bacterial and antifungal activity. Assessment of the impact of 3 or 5 cancer cell line treatment on 4E-BP1 phosphorylation, a predictive marker of ROS-mediated control of cap-dependent translation, also revealed deoxynyboquinone (5)-mediated downstream inhibition of 4E-BP1p. Evaluation of 1-9 in a recently established axolotl embryo tail regeneration assay also highlighted the prototypical telomerase inhibitor γ-rubromycin (8) as a new inhibitor of tail regeneration. Cumulatively, this work highlights an alternative nybomycin production strain, a small set of new nybomycin metabolites, and previously unknown functions of rubromycins (antifungal activity and inhibition of tail regeneration) and also provides a basis for revision of the previously proposed nybomycin biosynthetic pathway.

中文翻译:

采矿开垦地相关链霉菌中霉素的代谢产物的结构测定,功能表征和生物合成意义。

我们报告了三种新的霉素(nybomycins BD,1-3)和六种已知化合物(nybomycin,4; deoxynyboquinone,5;α-rubromycin,6;β-rubromycin,7;γ-rubromycin,8;和6种已知化合物的分离和表征。 [2α(1E,3E),4β] -2-(1,3-戊二烯基)-4-哌啶醇,9)来自Rock Creek(McCreary County,KY)地下煤矿酸回收场,分离到Streptomyces sp.。AD-3-6。Nybomycin D(3)和Deoxynyboquinone(5)表现出中度(3)至强效(5)癌细胞系细胞毒性,并表现出弱至中度的抗Gram-(+)细菌活性,而rubromycins 6-8则几乎没有癌细胞。系细胞毒性,但具有中等至强效的抗革兰氏阳性细菌和抗真菌活性。评估3种或5种癌细胞系治疗对4E-BP1磷酸化的影响,ROS介导的帽依赖性翻译控制的预测标记,也揭示了脱氧nyboquinone(5)介导的对4E-BP1p的下游抑制。在最近建立的a胚胎尾巴再生测定中对1-9的评估也突出了原型端粒酶抑制剂γ-鲁霉素(8)作为尾巴再生的新抑制剂。累计地,这项工作着重介绍了另一种霉素生产菌株,少量新霉素代谢产物以及红霉素以前未知的功能(抗真菌活性和抑制尾巴再生),也为修订以前提出的霉素新生物合成途径提供了基础。在最近建立的a胚胎尾巴再生测定中对1-9的评估也突出了原型端粒酶抑制剂γ-鲁霉素(8)作为尾巴再生的新抑制剂。累计地,这项工作着重介绍了另一种霉素生产菌株,少量新霉素代谢产物以及红霉素以前未知的功能(抗真菌活性和抑制尾巴再生),也为修订以前提出的霉素新生物合成途径提供了基础。在最近建立的a胚胎尾巴再生测定中对1-9的评估也突出了原型端粒酶抑制剂γ-鲁霉素(8)作为尾巴再生的新抑制剂。累计地,这项工作着重介绍了另一种霉素生产菌株,少量新霉素代谢产物以及红霉素以前未知的功能(抗真菌活性和抑制尾巴再生),也为修订以前提出的霉素新生物合成途径提供了基础。
更新日期:2019-12-13
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