The canonical arsRBC genes of the ars1 operon in Pseudomonas putida KT2440, which confer tolerance to arsenate and arsenite, are followed by a series of additional ORFs culminating in phoN1. The phoN1 gene encodes an acetyltransferase that imparts resistance to the glutamine synthetase inhibitor herbicide phosphinothricin (PPT). The co-expression of phoN1 and ars genes in response to environmental arsenic, along with the physiological effects, was analysed through transcriptomics of cells exposed to the oxyanion and phenotypic characterization of P.
View Article and Find Full Text PDFPollution by metalloids, e.g., tellurite and selenite, is of serious environmental concern and, therefore, there is an increasing interest in searching for ecologically friendly solutions for their elimination.
View Article and Find Full Text PDFArsenic is a toxic element widely distributed in nature, but numerous bacteria are able to resist its toxicity mainly through the genes encoding an arsenate reductase and an arsenite efflux pump. Some "arsenotrophic" bacteria are also able to use arsenite as energy supplier during autotrophic growth by coupling anaerobic arsenite oxidation the gene products to nitrate respiration or photosynthesis. Here, we have demonstrated that sp.
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