Table 1.
pH-sensing sites in plant ammonium and nitrate transporters
| Transporter | Transport mode | pH sensing site | Localization | References |
|---|---|---|---|---|
| AtNPF6.3/NRT1.1/CHL1 | 2 H+/1 NO3– symport | ExxER (E41, E44), His365 (H365) | PM | Sun et al. (2014); Parker and Newstead (2014) |
| PvAMT1;1 | 1 H+/1 NH4+ symport | His211 (H211) | PM | Ortiz-Ramirez et al. (2011) |
| OsNRT2.3b | 2 H+/1 NO3– symport | His167 (H167) | PM | Fan et al. (2016) |
| AtCLCa | 1 H+/2 NO3– antiport | Glu203 (E203), Glu270 (E270) | Tonoplast | Bergsdorf et al. (2009); Miller and Nguitragool (2009) |
At, Arabidopsis; Pv, common bean; Os, rice. PM, plasma membrane; E, glutamate; H, histidine.