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  • Assistant Professor
  • Associate Professor
  • Clinical Research Assistant
  • Full Professor
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  • PhD Student
  • Physician
  • Post-doc
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  • Research Engineer
  • Retired scientist
  • Technician
  • Undergraduate Student
  • Veterinary
  • Visiting Scientist
  • Deputy Director of Center
  • Deputy Director of Department
  • Deputy Director of National Reference Center
  • Deputy Head of Facility
  • Director of Center
  • Director of Department
  • Director of Institute
  • Director of National Reference Center
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  • Head of Operations
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  • Labex Coordinator
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© Melanie Blokesch, EPFL
Flagellated Vibrio cholerae
Scientific Fields
Diseases
Organisms
Applications
Technique

About

I am a geneticist, passionate about bacteria and their evolutionary mechanisms. I lead a team working on horizontal gene transfer, recombination, the SOS response and genome architecture.

I did my PhD in Genetics, on the genes encoding the light harvesting complexes of cyanobacteria – the phycobilisomes- and their regulation by the light composition as well as by sulfur availability in waters. I then worked on the formylation/ deformylation steps of the translation initiation process in bacteria. I identified the deformylase gene and showed that this essential activity, exclusively found in bacteria, was an ideal target for the development of new antibiotics. After that, I went to UBC, as visiting prof. with Julian Davies, where I started to work on integrons and their origin. At that time, in 1995, they were only described as the primary source of resistance toward multiple antibiotics among Gram-negative pathogens. With Julian, we identified the first chromosomal integron in Vibrio cholerae, where this platform plays a broader role for adaptation.  Back in Paris, I pursued this exciting project and first concentrated my efforts on understanding the basics of the integron’s genetic unique properties, in particular on the molecular mechanisms and the dynamics of gene capture in integrons, in the context of the antibiotic resistance development. In recent years, we have expanded our studies to two new topics: – how subinhibitory concentrations of antibiotics trigger specific stress responses and genetic diversification; – the understanding of the two chromosomes architecture of Vibrio species genomes, and the selective advantages it conveys, using V. cholerae, the agent of cholera, as paradigm.

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