In enzymology, a galactarate O-hydroxycinnamoyltransferase () is an enzyme that catalyzes the chemical reaction feruloyl-CoA + galactarate CoA + O-feruloylgalactarate Thus, the two substrates of this enzyme are feruloyl-CoA and galactarate, whereas its two products are CoA and O-feruloylgalactarate. This enzyme belongs to the family of transferases, specifically those acyltransferases transferring groups other than aminoacyl groups. The systematic name of this enzyme class is feruloyl-CoA:galactarate O-(hydroxycinnamoyl)transferase. This enzyme is also called galacturate hydroxycinnamoyltransferase. References EC 2.3.1 Enzymes of unknown structure