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TraN: A novel repressor of an Enterococcus conjugative type IV secretion system
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Number of Authors: 112018 (English)In: Nucleic Acids Research, ISSN 0305-1048, E-ISSN 1362-4962, Vol. 46, no 17, p. 9201-9219Article in journal (Refereed) Published
Abstract [en]

The dissemination of multi-resistant bacteria represents an enormous burden on modern healthcare. Plasmid-borne conjugative transfer is the most prevalent mechanism, requiring a type IV secretion system that enables bacteria to spread beneficial traits, such as resistance to last-line antibiotics, among different genera. Inc18 plasmids, like the Gram-positive broad host-range plasmid pIP501, are substantially involved in propagation of vancomycin resistance from Enterococci to methicillin-resistant strains of Staphylococcus aureus. Here, we identified the small cytosolic protein TraN as a repressor of the pIP501-encoded conjugative transfer system, since deletion of traN resulted in upregulation of transfer factors, leading to highly enhanced conjugative transfer. Furthermore, we report the complex structure of TraN with DNA and define the exact sequence of its binding motif. Targeting this protein-DNA interaction might represent a novel therapeutic approach against the spreading of antibiotic resistances.

Place, publisher, year, edition, pages
2018. Vol. 46, no 17, p. 9201-9219
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Biological Sciences
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URN: urn:nbn:se:su:diva-162938DOI: 10.1093/nar/gky671ISI: 000450952000049PubMedID: 30060171OAI: oai:DiVA.org:su-162938DiVA, id: diva2:1271557
Available from: 2018-12-17 Created: 2018-12-17 Last updated: 2018-12-17Bibliographically approved

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Kohler, VerenaAufschnaiter, AndreasPavkov-Keller, TeaBüttner, SabrinaKeller, Walter
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Department of Molecular Biosciences, The Wenner-Gren Institute
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Nucleic Acids Research
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