Heptaprenyl diphosphate synthase
In enzymology, a heptaprenyl diphosphate synthase is an enzyme that catalyzes the chemical reaction
Thus, the two substrates of this enzyme are (2E,6E)-farnesyl diphosphate and isopentenyl diphosphate, whereas its two products are diphosphate and all-trans-heptaprenyl diphosphate.
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 -farnesyl-diphosphate:isopentenyl-diphosphate farnesyltranstransferase . Other names in common use include all-trans-heptaprenyl-diphosphate synthase, heptaprenyl pyrophosphate synthase, and heptaprenyl pyrophosphate synthetase. This enzyme participates in biosynthesis of steroids.