@article{oai:nagoya.repo.nii.ac.jp:02001587,
 author = {Ohkubo, Yuri and Kuwata, Keiko and Matsubayashi, Yoshikatsu},
 issue = {3},
 journal = {Nature Plants},
 month = {Mar},
 note = {The nitrate transporter NRT2.1, which plays a central role in high-affinity nitrate uptake in roots, is activated at the post-translational level in response to nitrogen (N) starvation. However, the critical enzymes required for the post-translational activation of NRT2.1 remain to be identified. Here, we show that a type 2C protein phosphatase, designated CEPD-induced phosphatase (CEPH), activates high-affinity nitrate uptake by directly dephosphorylating Ser501 of NRT2.1, a residue that functions as a negative phospho-switch in Arabidopsis. CEPH is predominantly expressed in epidermal and cortex cells in roots and is upregulated by N starvation via a CEPDL2/CEPD1/2-mediated long-distance signalling from shoots. The loss of CEPH leads to marked decreases in high-affinity nitrate uptake, tissue nitrate content and plant biomass. Collectively, our results identify CEPH as a crucial enzyme in the N-starvation-dependent activation of NRT2.1 and provide molecular and mechanistic insights into how plants regulate high-affinity nitrate uptake at the post-translational level in response to the N environment.},
 pages = {310--316},
 title = {A type 2C protein phosphatase activates high-affinity nitrate uptake by dephosphorylating NRT2.1},
 volume = {7},
 year = {2021}
}