The complex development of psoralen-interstrand crosslink resistance in Escherichia coli requires AcrR inactivation, retention of a marbox sequence, and one of three MarA, SoxS, or Rob global regulators.

Abstract excerpt

Crosslinking agents, such as psoralen and UVA radiation, can be effectively used as antimicrobials and for treating several dysplastic conditions in humans, including some cancers. Yet, both cancer cells and bacteria can become resistant to these compounds, making it important to understand how resistance develops. Recently, several mutants were isolated that developed high levels of resistance to these compounds...

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