Protein
Phosphate transporter PHO1
Organism
Arabidopsis thaliana
Function
Inositol polyphosphate sensor that associates with transcription factors to regulate inorganic phosphate (Pi) starvation responses (PubMed:27080106). Probably acts by binding inositol polyphosphate via its SPX domain (PubMed:27080106). Acts as a Pi exporter, mediating efflux of Pi out of cells (PubMed:21309867, PubMed:22449068). Transfers Pi from the epidermal and cortical cells to the root xylem vessels (PubMed:11971143). Involved in the transfer of Pi from roots to shoots (PubMed:11971143, PubMed:17461783). Involved in abscisic acid (ABA) induction of stomatal closure and ABA repression of stomatal opening (PubMed:22612335).
Similarity
Belongs to the SYG1 (TC 2.A.94) family.
Sequence
MVKFSKELEAQLIPEWKEAFVNYCLLKKQIKKIKTSRKPKPASHYPIGHHSDFGRSLFDPVRKLARTFSDKLFSNSEKPEILQVRRRRGSSETGDDVDEIYQTELVQLFSEEDEVKVFFARLDEELNKVNQFHKPKETEFLERGEILKKQLETLAELKQILSDRKKRNLSGSNSHRSFSSSVRNSDFSAGSPGELSEIQSETSRTDEIIEALERNGVSFINSATRSKTKGGKPKMSLRVDIPDAVAGAEGGIARSIATAMSVLWEELVNNPRSDFTNWKNIQSAEKKIRSAFVELYRGLGLLKTYSSLNMIAFTKIMKKFDKVAGQNASSTYLKVVKRSQFISSDKVVRLMDEVESIFTKHFANNDRKKAMKFLKPHQTKDSHMVTFFVGLFTGCFISLFVIYIILAHLSGIFTSSDQVSYLETVYPVFSVFALLSLHMFMYGCNLYMWKNTRINYTFIFEFAPNTALRYRDAFLMGTTFMTSVVAAMVIHLILRASGFSASQVDTIPGILLLIFICVLICPFNTFYRPTRFCFIRILRKIVCSPFYKVLMVDFFMGDQLTSQIPLLRHLETTGCYFLAQSFKTHEYNTCKNGRYYREFAYLISFLPYFWRAMQCVRRWWDESNPDHLINMGKYVSAMVAAGVRITYARENNDLWLTMVLVSSVVATIYQLYWDFVKDWGLLNPKSKNPWLRDNLVLRNKNFYYLSIALNLVLRVAWIETIMRFRVSPVQSHLLDFFLASLEVIRRGHWNFYRVENEHLNNVGQFRAVKTVPLPFLDRDSDG