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Type VI secretion system effector proteins: effective weapons for bacterial competitiveness

Ruth E Hernandez, Ramses Gallegos-Monterrosa, Sarah J Coulthurst
Cellular Microbiology 2020 June 27, : e13241
32592518
The Type VI secretion system (T6SS) is a protein translocation nanomachine widespread amongst Gram-negative bacteria and used as a means to deliver effectors directly into target bacterial or eukaryotic cells. These effectors have a wide variety of functions within target cells which ultimately help the secreting cell gain a competitive fitness advantage. Here we discuss the different ways in which these effectors can be delivered by the T6SS and the diverse mechanisms by which they exert their noxious action upon recipient cells. We also highlight the existence of roles for T6SS effectors beyond simply the killing of neighbouring cells. This article is protected by copyright. All rights reserved.

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