Havryliuk Olesia, Hovorukha Vira, Patrauchan Marianna, Youssef Noha H, Tashyrev Oleksandr
Department of Extremophilic Microorganisms Biology, D. K. Zabolotny Institute of Microbiology and Virology of the National Academy of Sciences of Ukraine, 154 Zabolotny St., Kyiv 03143, Ukraine.
Department of Microbiology and Molecular Genetics, Oklahoma State University, 307 LSE, Stillwater, Oklahoma 74075, United States of America.
Curr Res Microb Sci. 2020 Jun 27;1:44-52. doi: 10.1016/j.crmicr.2020.06.002. eCollection 2020 Sep.
Environmental copper pollution causes major destruction to ecological systems, which require the development of environmentally friendly biotechnological, in particular, microbial methods for copper removal. These methods rely on the availability of microorganisms resistant to high levels of copper. Here we isolated four bacterial strains with record resistance to up to 1.0 M Cu(II). The strains were isolated from ecologically diverse soil samples, and their genomes were sequenced. A 16S rRNA sequence-based phylogenetic analysis identified that all four isolates belong to the genus . Particularly, strains UKR1 and UKR2 isolated from Kyiv region in Ukraine were identified as and , respectively, and strains UKR3 and UKR4 isolated from Svalbard Island in the Arctic Ocean and Galindez Island in Antarctica, respectively, were identified as . Initial screening for genes encoding copper resistance mechanisms showed that all four strains encode copper resistance proteins CopA, CopB, CopD, CopA3, CopZ, as well as two-component regulatory system CusRS, all known to be associated with metal resistance in genus. Further detailed studies will aim to characterize the full genomic potential of the isolates to enable their application for copper bioremediation in contaminated soils and industrial wastewaters.
环境铜污染对生态系统造成了重大破坏,这就需要开发环境友好型生物技术方法,特别是微生物法来去除铜。这些方法依赖于对高浓度铜具有抗性的微生物。在此,我们分离出了四株对高达1.0 M Cu(II)具有创纪录抗性的细菌菌株。这些菌株是从生态多样的土壤样本中分离出来的,并对其基因组进行了测序。基于16S rRNA序列的系统发育分析确定,所有四株分离株均属于 属。特别是,从乌克兰基辅地区分离出的UKR1和UKR2菌株分别被鉴定为 和 ,而分别从北冰洋的斯瓦尔巴德群岛和南极洲的加林德兹岛分离出的UKR3和UKR4菌株被鉴定为 。对编码铜抗性机制的基因进行的初步筛选表明,所有四株菌株均编码铜抗性蛋白CopA、CopB、CopD、CopA3、CopZ,以及双组分调节系统CusRS,所有这些都已知与 属中的金属抗性相关。进一步的详细研究旨在表征这些分离株的全基因组潜力,以便将其应用于污染土壤和工业废水中的铜生物修复。