In enzymology, an adenylate dimethylallyltransferase () is an enzyme that catalyzes the chemical reaction
Thus, the two substrates of this enzyme are dimethylallyl diphosphate and AMP, whereas its two products are diphosphate and N6-(dimethylallyl)adenosine 5'-phosphate.
This enzyme belongs to the family of transferases, specifically those transferring aryl or alkyl groups other than methyl groups. The systematic name of this enzyme class is dimethylallyl-diphosphate:AMP dimethylallyltransferase. Other names in common use include cytokinin synthase, isopentenyltransferase, 2-isopentenyl-diphosphate:AMP Delta2-isopentenyltransferase, and adenylate isopentenyltransferase.