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- W2968753815 abstract "SUMMARY The Type VI secretion system (T6SS) is a bacterial weapon which delivers toxic effectors to kill competitors or subvert some of their key functions. Here we use tra nsposon d irected insertion-site s equencing (TraDIS) to identify T6SS toxins associated with the H1-T6SS, one of the three T6SS machines found in Pseudomonas aeruginosa . This approach identified several putative toxin-immunity pairs, including Tse8-Tsi8. Full characterization of this protein pair demonstrated that Tse8 is delivered by the VgrG1a spike complex into prey cells where it targets the transamidosome, a multiprotein complex involved in protein synthesis in bacteria lacking either one or both of the asparagine or glutamine tRNA synthases. Our data suggests that Tse8 combines as a non-cognate component of the transamidosome complex, reducing fitness by limiting the ability of the cell to synthesize proteins. This is the first demonstration of a T6SS toxin affecting protein synthesis, expanding the range of cellular components targeted by this bacterial weapon. The success of the current study validates the use of our TraDIS approach as a tool to drastically expand the repertoire of T6SS toxins in any T6SS-encoding bacterium." @default.
- W2968753815 created "2019-08-22" @default.
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- W2968753815 date "2019-08-13" @default.
- W2968753815 modified "2023-09-24" @default.
- W2968753815 title "Discovery of aPseudomonas aeruginosaType VI secretion system toxin targeting bacterial protein synthesis using a global genomics approach" @default.
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- W2968753815 doi "https://doi.org/10.1101/733030" @default.
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