PP2A — Sorghum bicolor

Summary

SbPP2A (SORBI_3004G092500) on sorghum chromosome 4 encodes a protein serine/threonine phosphatase with protein tyrosine phosphatase activator activity, protein phosphatase regulator activity, and dual-specificity protein kinase activity, belonging to the PPA2-like and calcineurin-like phosphoprotein phosphatase families. The gene is associated with C4 photosynthesis, TOR signaling, regulation of abscisic acid anabolism, gibberellin biosynthesis, and protein dephosphorylation. It has been linked to traits including seed yield, biomass yield, leaf elongation rate, root mass density, nitrate uptake, phosphorus uptake, iron concentration, cadmium concentration, aluminum response, high temperature stress response, and stomatal complex closure time. The product localizes to the PP2A complex, cytosol, nucleus, plasmalemma, mitochondria, and ER membrane. Studies of related genes in other species link the family to phosphorus deficiency tolerance, nitrogen metabolism, iron acquisition, salinity tolerance, and disease resistance.