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- W2896006449 abstract "Abstract The activity of type II toxin-antitoxin systems (TA), which are responsible for many important features of bacterial cells, is based on the differences between toxin and antitoxin stabilities. The antitoxin lability results from bacterial protease activity. Here, we investigated how particular Escherichia coli cytosolic proteases, namely, Lon, ClpAP, ClpXP, and ClpYQ, affect the stability of both the toxin and antitoxin components of the parDE system from the broad host range plasmid RK2. The results of our in vivo and in vitro experiments show that the ParD antitoxin is degraded by the ClpAP protease, and dsDNA stimulates this process. The ParE toxin is not degraded by any of these proteases and can therefore cause growth inhibition of plasmid-free cells after an unequal plasmid distribution during cell division. We also demonstrate that the ParE toxin interaction with ParD prevents antitoxin proteolysis by ClpAP; however, this interaction does not prevent the ClpAP interaction with ParD. We show that ClpAP protease homologs affect plasmid stability in other bacterial species, indicating that ClpAP is a universal activator of the parDE system and that ParD is a universal substrate for ClpAP." @default.
- W2896006449 created "2018-10-26" @default.
- W2896006449 creator A5026638441 @default.
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- W2896006449 date "2018-10-16" @default.
- W2896006449 modified "2023-10-12" @default.
- W2896006449 title "ClpAP protease is a universal factor that activates the parDE toxin-antitoxin system from a broad host range RK2 plasmid" @default.
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- W2896006449 doi "https://doi.org/10.1038/s41598-018-33726-y" @default.
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