Bifunctional serine/threonine kinase and phosphorylase involved in the regulation of the pyruvate, phosphate dikinase (PPDK) by catalyzing its phosphorylation/dephosphorylation. 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] Constitutively expressed. Lowers the level of gapB and pckA transcription threefold under both glycolytic and gluconeogenic conditions. Belongs to the pyruvate, phosphate/water dikinase regulatory protein family. PDRP subfamily.