Bifunctional serine/threonine kinase and phosphorylase involved in the dark/light-mediated regulation of PPDK by catalyzing its phosphorylation/dephosphorylation. Dark/light-induced changes in stromal concentrations of the competing ADP and Pi substrates govern the direction of the reaction. In the dark, phosphorylates the catalytic intermediate of PPDK (PPDK-HisP), inactivating it. Light exposure induces the phosphorolysis reaction that reactivates PPDK (By similarity). ADP + N(tele)-phospho-L-histidyl/L-threonyl-[pyruvate, phosphate dikinase] = AMP + H(+) + N(tele)-phospho-L-histidyl/O-phospho-L-threonyl-[pyruvate, phosphate dikinase] H(+) + N(tele)-phospho-L-histidyl/O-phospho-L-threonyl-[pyruvate, phosphate dikinase] + phosphate = diphosphate + N(tele)-phospho-L-histidyl/L-threonyl-[pyruvate, phosphate dikinase] Regulated by light/dark exposure. Belongs to the pyruvate, phosphate/water dikinase regulatory protein family. PDRP subfamily.