L-iditol 2-dehydrogenase

In enzymology, a L-iditol 2-dehydrogenase is an enzyme that catalyzes the chemical reaction


 * L-iditol + NAD+  L-sorbose + NADH + H+

Thus, the two substrates of this enzyme are L-iditol and NAD+, whereas its 3 products are L-sorbose, NADH, and H+.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is L-iditol:NAD+ 2-oxidoreductase. Other names in common use include polyol dehydrogenase, sorbitol dehydrogenase, L-iditol:NAD+ 5-oxidoreductase, L-iditol (sorbitol) dehydrogenase, glucitol dehydrogenase, L-iditol:NAD+ oxidoreductase, NAD+-dependent sorbitol dehydrogenase, NAD+-dependent sorbitol dehydrogenase, and NAD+-sorbitol dehydrogenase. This enzyme participates in fructose and mannose metabolism.

Structural studies
As of late 2007, 4 structures have been solved for this class of enzymes, with PDB accession codes, , , and.