ID   1.3.1.77
DE   Anthocyanidin reductase ((2R,3R)-flavan-3-ol-forming).
AN   ANR.
AN   Anthocyanidin reductase.
CA   A (2R,3R)-flavan-3-ol + 2 NAD(P)(+) = an anthocyanidin with a 3-hydroxy
CA   group + 2 NAD(P)H.
CC   -!- The enzyme participates in the flavonoid biosynthesis pathway found
CC       in plants.
CC   -!- It catalyzes the double reduction of anthocyanidins, producing
CC       (2R,3R)-flavan-3-ol monomers required for the formation of
CC       proanthocyanidins.
CC   -!- While the enzyme from the legume Medicago truncatula can use both
CC       NADPH and NADH as reductant, that from the crucifer Arabidopsis
CC       thaliana uses only NADPH.
CC   -!- Also, while the substrate preference of the M.truncatula is
CC       cyanidin>pelargonidin>delphinidin, the reverse preference is found
CC       with the Arabidopsis enzyme.
CC   -!- Cf. EC 1.3.1.112.
DR   Q9SEV0, BAN_ARATH  ;
//