Escherichia coli BarA-UvrY regulates the pks island and kills Staphylococci via the genotoxin colibactin
Wong, J. J.; Chong, K. K. L.; Ho, F. K.; Ho, C. M. B.; Neelakandan, R.; Choo, P. Y.; Keogh, D.; Chen, J.; Liu, C. F.; Kline, K. A.
Show abstract
Wound infections are often polymicrobial in nature and are associated with poor disease prognoses. Escherichia coli and Staphylococcus aureus are among the top five most cultured pathogens from wound infections. However, little is known about the polymicrobial interactions between E. coli and S. aureus during wound infections. In this study, we show that E. coli kills S. aureus both in vitro and in a mouse excisional wound model via the genotoxin, colibactin. We also show that the BarA-UvrY two component system (TCS) is a novel regulator of the pks island, which acts through the carbon storage global regulatory (Csr) system. Together, our data demonstrate the role of colibactin in inter-species competition and show that it is regulated by BarA-UvrY TCS, a previously uncharacterized regulator of the pks island.
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