RP1 — Sorghum bicolor

Summary

SbRP1 (SORBI_3002G324500) on sorghum chromosome 2 encodes a pyruvate, phosphate dikinase regulatory protein that localises to the chloroplast stroma and cytosol. This bifunctional enzyme possesses both protein kinase (EC 2.7.11.32) and protein phosphatase activity (EC 2.7.4.27), acting as a phosphotransferase with ATP binding capability. The gene is associated with phosphotransferase activity, protein serine/threonine kinase activity, and protein phosphatase activity. Studies of related genes in other species link the family to stem rust, iron concentration, biomass yield, water use efficiency, photochemical quenching, root morphology traits, and drought tolerance.