In enzymology, a cytokinin dehydrogenase (EC 1.5.99.12) is an enzyme that catalyzes the chemical reaction The 3 substrates of this enzyme are cytokinin (here represented by N6-dimethylallyladenine), electron acceptor, and H2O, whereas its 3 products are adenine, 3-methylbut-2-enal (or other aldehyde in case of different substrate), and reduced acceptor.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-NH group of donors with other acceptors.
The systematic name of this enzyme class is N6-dimethylallyladenine:acceptor oxidoreductase.
As of late 2007, 6 structures have been solved for this class of enzymes, with PDB accession codes 1W1O, 1W1Q, 1W1R, 1W1S, 2EXR, and 2Q4W.
As of March 2016, there have been 18 structures[permanent dead link] deposited to PDB.