Center for Bioinformatics & Computational Biology, Department of Biology, Jackson State University, Jackson, MS 39217, USA.
Biomed Res Int. 2013;2013:196409. doi: 10.1155/2013/196409. Epub 2013 Sep 10.
The culture-independent strategies to study microbial diversity and function have led to a revolution in environmental genomics, enabling fundamental questions about the distribution of microbes and their influence on bioremediation to be addressed. In this research we used the expression of universal stress proteins as a probe to determine the changes in degrading microbial population from a highly toxic terephthalate wastewater to a less toxic activated sludge bioreactor. The impact of relative toxicities was significantly elaborated at the levels of genus and species. The results indicated that 23 similar prokaryotic phyla were represented in both metagenomes irrespective of their relative abundance. Furthermore, the following bacteria taxa Micromonosporaceae, Streptomyces, Cyanothece sp. PCC 7822, Alicyclobacillus acidocaldarius, Bacillus halodurans, Leuconostoc mesenteroides, Lactococcus garvieae, Brucellaceae, Ralstonia solanacearum, Verminephrobacter eiseniae, Azoarcus, Acidithiobacillus ferrooxidans, Francisella tularensis, Methanothermus fervidus, and Methanocorpusculum labreanum were represented only in the activated sludge bioreactor. These highly dynamic microbes could serve as taxonomic biomarkers for toxic thresholds related to terephthalate and its derivatives. This paper, highlights the application of universal stress proteins in metagenomics analysis. Dynamics of microbial consortium of this nature can have future in biotechnological applications in bioremediation of toxic chemicals and radionuclides.
非培养策略研究微生物多样性和功能已经引发了环境基因组学的革命,使人们能够解决有关微生物分布及其对生物修复影响的基本问题。在这项研究中,我们使用普遍应激蛋白的表达作为探针,以确定从高毒性对苯二甲酸废水中到毒性较低的活性污泥生物反应器中降解微生物种群的变化。相对毒性的影响在属和种的水平上得到了详细阐述。结果表明,23 个相似的原核门在两个宏基因组中都有代表,而不管它们的相对丰度如何。此外,以下细菌分类群 Micromonosporaceae、Streptomyces、Cyanothece sp. PCC 7822、Alicyclobacillus acidocaldarius、Bacillus halodurans、Leuconostoc mesenteroides、Lactococcus garvieae、Brucellaceae、Ralstonia solanacearum、Verminephrobacter eiseniae、Azoarcus、Acidithiobacillus ferrooxidans、Francisella tularensis、Methanothermus fervidus 和 Methanocorpusculum labreanum 仅在活性污泥生物反应器中被代表。这些高度动态的微生物可以作为与对苯二甲酸及其衍生物相关的毒性阈值的分类生物标志物。本文强调了普遍应激蛋白在宏基因组分析中的应用。这种性质的微生物联合体的动态变化可能在生物修复有毒化学品和放射性核素的生物技术应用中具有未来。