2.A.1.9.12
Phosphate transporter and receptor (transceptor) of 543 aas and 12 TMSs.  Important for signalling and uptake of phosphate.  The majority of terrestrial vascular plants can form mutualistic associations with obligate biotrophic arbuscular mycorrhizal (AM) fungi from the phylum Glomeromycota. This mutualistic symbiosis provides carbohydrates to the fungus, and reciprocally improves plant phosphate uptake. AM fungal transporters can acquire phosphate from the soil through the hyphal networks. Xie et al. 2016 reported a high-affinity phosphate transporter GigmPT that is required for AM symbiosis. GigmPT functions as a phosphate transceptor for the activation of the phosphate signaling pathway as well as the protein kinase A signaling cascade.