Biosynthesis of curcuminoids and gingerols in turmeric (Curcuma longa) and ginger (Zingiber officinale): Identification of curcuminoid synthase and hydroxycinnamoyl-CoA thioesterases

Curcuminoid synthase activity in turmeric (Curcuma longa) crude protein extracts converts feruloyl-CoA into curcumin, whereas a thioesterase activity in ginger (Zingiber officinale) crude protein extracts hydrolyzes this precursor, preventing identification of gingerol synthase activity.