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| Medeiros,Julliane Dutra; Cantão,Maurício Egídio; Cesar,Dionéia Evangelista; Nicolás,Marisa Fabiana; Diniz,Cláudio Galuppo; Silva,Vânia Lúcia; Vasconcelos,Ana Tereza Ribeiro de; Coelho,Cíntia Marques. |
| Abstract Rivers and streams are important reservoirs of freshwater for human consumption. These ecosystems are threatened by increasing urbanization, because raw sewage discharged into them alters their nutrient content and may affect the composition of their microbial community. In the present study, we investigate the taxonomic and functional profile of the microbial community in an urban lotic environment. Samples of running water were collected at two points in the São Pedro stream: an upstream preserved and non-urbanized area, and a polluted urbanized area with discharged sewage. The metagenomic DNA was sequenced by pyrosequencing. Differences were observed in the community composition at the two sites. The non-urbanized area was overrepresented by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic environment; Urbanization; Microbial community; Metagenomic. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000400835 |
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| Alarcón,Frank; Vasconcelos,Ana Tereza Ribeiro de; Yim,Lucia; Zaha,Arnaldo. |
| Bacterial cell division has been studied mainly in model systems such as Escherichia coli and Bacillus subtilis, where it is described as a complex process with the participation of a group of proteins which assemble into a multiprotein complex called the septal ring. Mycoplasmas are cell wall-less bacteria presenting a reduced genome. Thus, it was important to compare their genomes to analyze putative genes involved in cell division processes. The division and cell wall (dcw) cluster, which in E. coli and B. subtilis is composed of 16 and 17 genes, respectively, is represented by only three to four genes in mycoplasmas. Even the most conserved protein, FtsZ, is not present in all mycoplasma genomes analyzed so far. A model for the FtsZ protein from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cell division; Mycoplasma spp; Genomes. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000200003 |
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