Tocino-Márquez Inmaculada, Zehl Martin, Séneca Joana, Pjevac Petra, Felkl Manuel, Becker Christian F W, Loy Alexander, Rattei Thomas, Ostrovsky Andrew N, Zotchev Sergey B
Department of Pharmaceutical Sciences, Division of Pharmacognosy, University of Vienna, 1090, Vienna, Austria.
Doctoral School in Microbiology and Environmental Science, University of Vienna, 1030, Vienna, Austria.
Sci Rep. 2025 Aug 26;15(1):31456. doi: 10.1038/s41598-025-17084-0.
While marine bryozoans were shown to be a promising source of bioactive compounds with the potential to be developed into drugs, their freshwater counterparts remain understudied. Considering that bioactive compounds isolated from bryozoans may originate from bacterial communities associated with the hosts, we explored the bacterial community of the freshwater bryozoan Cristatella mucedo using genomics and metabolomics. 16 S rRNA gene amplicon sequencing of the bacterial community associated with C. mucedo showed a considerable overlap with communities from surrounding water and sediment. Using different isolation approaches we retrieved a diverse collection of bacterial strains representing 26 genera, including a potentially new one. Genome sequencing and analyses of representative isolates of each genus revealed considerable potential for secondary metabolite biosynthesis. The secondary metabolomes of both mono- and co-cultures of selected isolates and enriched bryozoan-derived communities were investigated, allowing the identification of several known and potentially novel secondary metabolites. This work provides important information regarding the composition of the bacterial community associated with C. mucedo and sets the stage for its further exploration and exploitation for drug discovery.
虽然海洋苔藓虫被证明是有潜力开发成药物的生物活性化合物的一个有前景的来源,但其淡水同类仍未得到充分研究。鉴于从苔藓虫中分离出的生物活性化合物可能源自与宿主相关的细菌群落,我们利用基因组学和代谢组学探索了淡水苔藓虫穆氏晶囊轮虫的细菌群落。对与穆氏晶囊轮虫相关的细菌群落进行的16S rRNA基因扩增子测序显示,其与周围水体和沉积物中的群落有相当大的重叠。我们采用不同的分离方法,获得了代表26个属的多种细菌菌株,包括一个可能的新属。对每个属的代表性分离株进行基因组测序和分析,发现其次级代谢产物生物合成潜力巨大。我们研究了选定分离株的单培养和共培养以及富集的苔藓虫衍生群落的次级代谢组,从而鉴定出几种已知的和潜在的新型次级代谢产物。这项工作提供了有关与穆氏晶囊轮虫相关的细菌群落组成的重要信息,并为其进一步探索和用于药物发现奠定了基础。