Korean Journal of Microbiology

Fig. 3.

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Fig. 3. Regulation of potassium homeostasis by EIIANtr in E. coli. Dephosphorylated EIIANtr in the state directly binds to TrkA to regulate its activity. At low potassium concentrations, potassium is absorbed into the cell by the KdpFABC potassium transporter. Upon activation by EIIANtr, KdpD transfers a phosphate group to KdpE and phosphorylated KdpE binds to an upstream promoter of kdpFABC to promote the expression of the genes. The nitrogen-related phosphotransferase system is directly involved in the regulation of K⁺ homeostasis in E. coli.
Korean J. Microbiol. 2022;58:109-19 https://doi.org/10.7845/kjm.2022.2053
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