ID   1.14.20.4
DE   anthocyanidin synthase.
AN   leucoanthocyanidin dioxygenase.
AN   leucocyanidin oxygenase.
CA   2-oxoglutarate + a (2R,3S,4S)-leucoanthocyanidin + O2 = a 4-H-
CA   anthocyanidin with a 3-hydroxy group + CO2 + 2 H2O + succinate.
CC   -!- Is involved in the pathway by which many flowering plants make
CC       anthocyanin flower pigments (glycosylated anthocyandins).
CC   -!- Hydroxylates the C-3 carbon, followed by a trans diaxial elimination,
CC       forming a C-2,C-3 enol.
CC   -!- The product loses a second water molecule to form anthocyanidins.
CC   -!- When assayed in vitro, non-enzymic epimerization of the product can
CC       lead to formation of dihydroflavanols.
CC   -!- Thus when the substrate is leucocyanidin, a mixture of (+)-taxifolin
CC       and (+)-epitaxifolin are formed.
CC   -!- The enzyme can also oxidize the formed (+)-taxifolin to quercetin
CC       (cf. EC 1.14.20.6).
CC   -!- Formerly EC 1.14.11.19.
DR   A2WQ39, ANS1_ORYSI ;  Q93VC3, ANS1_ORYSJ ;  Q67VR7, ANS2_ORYSJ ;
DR   A0A2R6PI27, LDOX_ACTCC ;  Q96323, LDOX_ARATH ;  P41213, LDOX_MAIZE ;
DR   P51091, LDOX_MALDO ;  O04274, LDOX_PERFR ;  P51092, LDOX_PETHY ;
DR   P51093, LDOX_VITVI ;
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