D arabinitol dehydrogenase (NADP )

D-arabinitol dehydrogenase (NADP⁺) (EC 1.1.1.287, NADP⁺-dependent D-arabitol dehydrogenase, ARD1p, D-arabitol dehydrogenase 1) is an enzyme with systematic name D-arabinitol:NADP⁺ oxidoreductase. This enzyme catalyses the following chemical reaction

(1) D-arabinitol + NADP⁺ ⇌ D-xylulose + NADPH + H⁺(2) D-arabinitol + NADP⁺ ⇌ D-ribulose + NADPH + H⁺

The enzyme present in the fungus Uromyces fabae can make use D-arabinitol and D-mannitol in the forward direction, and D-xylulose, D-ribulose and D-fructose in the reverse direction.