ID 4.2.3.107 DE (+)-car-3-ene synthase. AN 3-carene cyclase. CA (2E)-geranyl diphosphate = (+)-car-3-ene + diphosphate. CC -!- The enzyme reacts with (3S)-linalyl diphosphate twice as rapidly as CC geranyl diphosphate, but 25 times as rapidly as (3R)-linalyl CC diphosphate. CC -!- It is assumed that (3S)-linalyl diphosphate is normally formed as an CC enzyme bound intermediate in the reaction. CC -!- In the reaction the 5-pro-R hydrogen of geranyl diphosphate is CC eliminated during cyclopropane ring formation. CC -!- In Picea abies (Norway spruce) and Picea sitchensis (Sitka spruce) CC terpinolene is also formed. CC -!- See EC 4.2.3.113. CC -!- (+)-car-3-ene is associated with resistance of Picea sitchensis CC (Sitka spruce) to white pine weevil. DR Q84SM8, 3CAR1_PICAB; C7ASI9, 3CAR1_PICGL; F1CKI6, 3CAR1_PICSI; DR F2XF94, 3CAR1_PICXS; R9QMW4, 3CAR1_PINBN; R9QMW8, 3CAR1_PINCO; DR F1CKI8, 3CAR2_PICSI; R9QMR6, 3CAR2_PINBN; F1CKI9, 3CAR3_PICSI; //