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Local and Universal Action: The Paradoxes of Indole Signalling in Bacteria
Ashraf Zarkan1, Junyan Liu2, Marta Matuszewska3
1Department of Genetics, University of Cambridge, Cambridge, CB2 3EH, UK.
Abstract:
Indole is a signalling molecule produced by many bacterial species and involved in intraspecies, interspecies, and interkingdom signalling. Despite the increasing volume of research published in this area, many aspects of indole signalling remain enigmatic. There is disagreement over the mechanism of indole import and export and no clearly defined target through which its effects are exerted. Progress is hindered further by the confused and sometimes contradictory body of indole research literature. We explore the reasons behind this lack of consistency and speculate whether the discovery of a new, pulse mode of indole signalling, together with a move away from the idea of a conventional protein target, might help to overcome these problems and enable the field to move forward.
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