In enzymology, an anthocyanin 5-aromatic acyltransferase (EC 2.3.1.153) is an enzyme that catalyzes the chemical reaction

hydroxycinnamoyl-CoA + anthocyanidin-3,5-diglucoside CoA + anthocyanidin 3-glucoside-5-hydroxycinnamoylglucoside

Thus, the two substrates of this enzyme are hydroxycinnamoyl-CoA and anthocyanidin-3,5-diglucoside, whereas its two products are CoA and anthocyanidin 3-glucoside-5-hydroxycinnamoylglucoside.

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 hydroxycinnamoyl-CoA:anthocyanidin 3,5-diglucoside 5-O-glucoside-6"'-O-hydroxycinnamoyltransferase.

• Fujiwara H, Tanaka Y, Fukui Y, Nakao M, Ashikari T, Kusumi T (1997). "Anthocyanin 5-aromatic acyltransferase from Gentiana triflora Purification, characterization and its role in anthocyanin biosynthesis". Eur. J. Biochem. 249 (1): 45–51. doi:10.1111/j.1432-1033.1997.t01-1-00045.x. PMID 9363752.