Fig. 1. The nitrogen-PTS of E. coli (modified from Jahn et al., 2013). The nitrogen-phosphate transport system consists of EI^Ntr (ptsP), NPr (ptsO), and EIIA^Ntr (ptsN). The ptsN and ptsO genes are found in the same operon with the rpoN gene encoding σ⁵⁴. PTS^Ntr regulates various physiological activities of cells through a series of phosphorylation cascade systems in the direction of PEP → EI^Ntr → NPr → EIIA^Ntr.

Korean J. Microbiol. 2022;58:109-19 https://doi.org/10.7845/kjm.2022.2053

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