Journal
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
Volume 102, Issue 7, Pages 3037-3048Publisher
SPRINGER
DOI: 10.1007/s00253-018-8847-2
Keywords
Bacilli; Bioremediation of environmental mercury pollution; Dissemination of mercury resistance genes; Mercury resistance transposon; Transposon-mediated in situ molecular breeding
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Funding
- JSPS KAKENHI [16K07529]
- Grants-in-Aid for Scientific Research [16K07529] Funding Source: KAKEN
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Mercury-resistant (Hg-R) bacteria occur in various bacterial species from a wide variety of environmental sources. Resistance is conferred by a set of operon genes termed the mer operon. Many Hg-R bacteria have been isolated from diverse environments and clinical samples, and it is recognized that mer operons are often localized on transposons. Previous research reports have suggested that Hg-R transposons participate in the horizontal gene transfer of mer operons among bacteria. This was confirmed by a study that found that mer operons were distributed worldwide in Bacilli with dissemination of TnMERI1-like transposons. In this mini review, possible strategies for transposon-mediated in situ molecular breeding (ISMoB) of Hg-R bacteria in their natural habitat are discussed. In ISMoB, the target microorganisms for breeding are indigenous bacteria that are not Hg-R but that are dominant and robust in their respective environments. Additionally, we propose a new concept of bioremediation technology for environmental mercury pollution by applying transposon-mediated ISMoB for environmental mercury pollution control.
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