title: Construction of the recombinant broad-host-range plasmids providing their bacterial hosts arsenic resistance and arsenite oxidation ability.
abstract: The plasmid pSinA of Sinorhizobium sp. M14 was used as a source of functional phenotypic modules, encoding proteins involved in arsenite oxidation and arsenic resistance, to obtain recombinant broad-host-range plasmids providing their bacterial hosts arsenic resistance and arsenite oxidative ability. An arsenite oxidation module was cloned into pBBR1MCS-2 vector yielding plasmid vector pAIO1, while an arsenic resistance module was cloned into pCM62 vector yielding plasmid pARS1. Both plasmid constructs were introduced (separately and together) into the cells of phylogenetically distant (representing Alpha-, Beta-, and Gammaproteobacteria) and physiologically diversified (unable to oxidize arsenite and susceptible/resistant to arsenite and arsenate) bacteria. Functional analysis of the modified strains showed that: (i) the plasmid pARS1 can be used for the construction of strains with an increased resistance to arsenite [up to 20mM of As(III), (ii) the presence of the plasmid pAIO1 in bacteria previously unable to oxidize As(III) to As(V), contributes to the acquisition of arsenite oxidation abilities by these cells, (iii) the highest arsenite utilization rate are observed in the culture of strains harbouring both the plasmids pAIO1 and pARS1, (iv) the strains harbouring the plasmid pAIO1 were able to grow on arsenic-contaminated mine waters (∼ 3.0 mg As L(-1)) without any supplementation.
authors.affiliation: Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland. Electronic address: ldrewniak@biol.uw.edu.pl.
authors.forename: Lukasz
authors.initials: L
authors.lastname: Drewniak
authors.affiliation: Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
authors.forename: Martyna
authors.initials: M
authors.lastname: Ciezkowska
authors.affiliation: Department of Virology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
authors.forename: Monika
authors.initials: M
authors.lastname: Radlinska
authors.affiliation: Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Sklodowska
mesh_terms: D001151:Arsenic / Q000494:pharmacology*; D018053:Arsenites / Q000378:metabolism; D003001:Cloning, Molecular; D024881:Drug Resistance, Bacterial; D005822:Genetic Vectors / Q000235:genetics; D010957:Plasmids / Q000235:genetics*; D020560:Proteobacteria / Q000145:classification / Q000187:drug effects* / Q000235:genetics*; D014169:Transformation, Bacterial
chemical_list: D018053:Arsenites; D001151:Arsenic
keywords: Arsenic resistance; Arsenite oxidation; Bioremediation; Plasmid vectors