A zinc protein. The enzyme from the archaeon Picrophilus torridus is involved in glucose and galactose catabolism via the nonphosphorylative variant of the Entner-Doudoroff pathway. It shows 20-fold higher activity with NADP+ compared to NAD+. The oxidation of D-glucose and D-galactose is catalysed at a comparable rate (cf. EC 18.104.22.168, glucose 1-dehydrogenase (NADP+) and EC 22.214.171.124, galactose 1-dehydrogenase (NADP+)).