SPX domain-containing protein 1

UniProtKB accession:  Q69XJ0

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Involved in plant adaptation to phosphate (Pi) starvation (PubMed:19000161). Inhibits PHR2 DNA-binding activity via a Pi-dependent protein interaction (PubMed:25271318). Suppresses the regulation on expression of PT2 by PHR2 and accumulation of shoot Pi (PubMed:20149131). Optimizes growth under phosphate-limited conditions through a negative feedback loop of the PSI (phosphate starvation-induced) signaling pathway (PubMed:19000161, PubMed:20149131). Regulates the expression of SPX2, SPX3 and SPX5 (PubMed:19566645). May be an important link between signal transduction pathways related to phosphate starvation and cold stress (PubMed:19000161). Together with SPX2, plays a negative role in the regulation of leaf inclination by preventing RLI1 transcription factor activity in Pi depleted conditions (PubMed:29610209).