SXT/R391 ICE elements encode a novel ‘trap-door’ strategy for mobile element escape

Autor: Michael P Ryan, Patricia eArmshaw, Tony J Pembroke
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Frontiers in Microbiology, Vol 7 (2016)
Druh dokumentu: article
ISSN: 1664-302X
DOI: 10.3389/fmicb.2016.00829
Popis: Integrative Conjugative Elements (ICEs) are a class of bacterial mobile elements that have the ability to mediate their own integration, excision and transfer from one host genome to another by a mechanism of site-specific recombination, self-circularisation and conjugative transfer. Members of the SXT/R391 ICE family of enterobacterial mobile genetic elements display an unusual UV-inducible sensitisation function which results in stress induced killing of bacterial cells harbouring the ICE. This sensitisation has been shown to be associated with a stress induced overexpression of a mobile element encoded conjugative transfer gene, orf43, a traV homolog. This results in cell lysis and release of a circular form of the ICE. Induction of this novel system may allow transfer of an ICE, enhancing its survival potential under conditions not conducive to conjugative transfer.
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