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Inter-Kingdom beach warfare: Microbial chemical communication activates natural chemical defences

机译:王国间海滩战争:微生物化学传播激活天然化学防御

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An inter-kingdom beach warfare between a Streptomyces sp. and Aspergillus sp. co-isolated from shallow water beach sand, collected off Heron Island, Queensland, Australia, saw the bacteriostatic Aspergillus metabolite cyclo-(L-Phe-trans-4-hydroxy-L-Pro) (3) stimulate the Streptomyces to produce nitric oxide (NO), which in turn mediated transcriptional activation of a silent biosynthetic gene cluster (BGC) for fungistatic heronapyrrole B (1). Structure activity relationship studies, coupled with the use of NO synthase inhibitors, donors and scavangers, and both genomic and transcriptomic analyses, confirmed the extraordinary chemical cue specificity of 3, and its NO-mediated mechanism of transcriptional action. Our findings reveal the importance of inter-kingdom (fungal-bacterial) chemical communication in the regulation of silent BGCs coding for chemical defenses. We propose that the detection and characterisation of NO mediated transcriptional activation (NOMETA) of silent chemical defences in the environment, may inspire broader application in the field of microbial biodiscovery.
机译:王国间海滩战争在Streptomyces sp之间。和aspergillus sp。从澳大利亚昆士兰昆士兰岛苍鹭岛上收集的浅水海滩沙滩上,看到了抑菌曲霉属植物代谢物 - (L-Phe-Trans-4-羟基-L-Pro)(3)刺激肌瘤产生一氧化氮的链霉菌(否),其依次介导的静音生物合成基因簇(BGC)的转录激活用于稳定性的Heronapyrolole B(1)。结构活动关系研究,同时使用没有合酶抑制剂,供体和清除剂,以及基因组和转录组分析,证实了3的非凡化学提示特异性和其无介导的转录作用机制。我们的调查结果揭示了王国间(真菌 - 细菌)化学通信在调控化学防御的静音BGCS中的重要性。我们提出,环境中静音化学防御的静态转录激活(NOVEMA)的检测和表征可能会激发在微生物生物消泡领域的更广泛的应用。

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