mARs SIGNED

Project "mARs" data sheet

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 Project objective

Antibiotic resistance (AR) is spreading rapidly, leading to the development of highly virulent pathogens and multidrug-resistant ‘superbugs’, a major health concern of our era. Mobile DNA elements, transposons and integrons, effectively drive the spread of AR genes in microbial interaction hotspots, such as bacterial communities in humans and natural environments. Yet, our knowledge of their mechanisms remains very sparse. It is unclear how DNA movement occurs on the molecular level and how it is controlled in cells and communities; biochemical and structural data are rare and our view on their diversity and evolution is limited. Here I propose an integrated approach combining bioinformatics, genetics, microbiology, biochemistry, and structural biology to elucidate the mechanisms and diversity of mobile DNA driven resistance spreading. I want to (a) investigate the molecular mechanisms and regulation of AR gene movement in vitro, in model bacteria and in gut bacterial communities; (b) dissect the structure of the underlying molecular machineries to reveal how protein-DNA interplay promotes gene transfer; and (c) characterize the diversity, evolution and functional success of distinct molecular pathways. Mechanistic work will focus on selected mobile elements that confer resistance to last resort drugs and promiscuous gene carriers with high prevalence in health care. Bioinformatic quests will draw on recent (meta)genomic data to chart the clinical significance of molecular insights in situ. By bridging disciplines, I want to provide functionally annotated molecular movies of gene movement and explain how specific molecular strategies evolved to enable broad dissemination of resistance determinants. The insights gained in this research will provide in-depth knowledge on major AR transfer pathways and will have key implications for the development of novel intervention strategies and preventive measures aimed at reducing dissemination of drug resistance in bacteria.