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New complete genome insights into Enterobacter roggenkampii FACU2: a potential player in cadmium bio-removal. | LitMetric

AI Article Synopsis

Article Abstract

Industrial workplaces, particularly those involved in ore processing or smelting, pose a high risk of exposure to cadmium, a highly toxic metal. This study isolated and identified eight cadmium-resistant strains from industrial wastewater for their ability to resist cadmium. Enterobacter roggenkampii FACU2 demonstrated exceptional cadmium removal capabilities during our analysis, successfully eliminating 62% of the cadmium. Additionally, transmission electron microscopy (TEM) was utilized to examine the morphological change between the most and least efficient strains that responded to cadmium stress at the cellular level. Compared to the control bacteria, the treated bacteria exhibited notably higher levels of cadmium adsorption and accumulation within their cells. A complete genome analysis revealed that E. roggenkampii FACU2 has one chromosome and one plasmid with a size of 4,856,454 bp and 80,926 bp, respectively, in addition to harboring numerous heavy metal-resistant genes related to cadmium and other heavy metals. Moreover, the gene expression of four cadmium-resistant genes (czcA, cadA, czcC and czcD) showed that the high cadmium concentration led to a significant increase in czcA and cadA mRNA levels, thus indicating the activation of cadmium-resistant genes in the E. roggenkampii FACU2 compared to Enterobacter sp. strain FACU. Due to its ability to remove cadmium and other heavy metals, this strain holds promise as a source of genes for biological treatment methods. This application could contribute to environmental purification, ultimately benefiting human health.

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http://dx.doi.org/10.1007/s11274-024-04138-0DOI Listing

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Industrial workplaces, particularly those involved in ore processing or smelting, pose a high risk of exposure to cadmium, a highly toxic metal. This study isolated and identified eight cadmium-resistant strains from industrial wastewater for their ability to resist cadmium. Enterobacter roggenkampii FACU2 demonstrated exceptional cadmium removal capabilities during our analysis, successfully eliminating 62% of the cadmium.

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