ID 2.5.1.138 DE coumarin 8-geranyltransferase. CA (1) (2E)-geranyl diphosphate + umbelliferone = 8-geranylumbelliferone + CA diphosphate. CA (2) (2E)-geranyl diphosphate + esculetin = 8-geranylesculetin + CA diphosphate. CC -!- The enzyme, characterized from the plant Citrus limon, is specific CC for geranyl diphosphate as a prenyl donor. CC -!- It also has low activity with the coumarins 5,7-dihydroxycoumarin and CC 5-methoxy-7-hydroxycoumarin. DR A0A077K8G3, CGT1A_CITLI; A0A077K9K6, CGT1B_CITLI; //