ID   1.3.1.112
DE   anthocyanidin reductase [(2S)-flavan-3-ol-forming].
CA   (1) a (2S,3R)-flavan-3-ol + 2 NADP(+) = an anthocyanidin with a 3-hydroxy
CA   group + 2 H(+) + 2 NADPH.
CA   (2) a (2S,3S)-flavan-3-ol + 2 NADP(+) = an anthocyanidin with a 3-hydroxy
CA   group + 2 H(+) + 2 NADPH.
CC   -!- The enzyme, characterized from Vitis vinifera (grape), participates
CC       in the flavonoid biosynthesis pathway.
CC   -!- It catalyzes the double reduction of anthocyanidins, producing a
CC       mixture of (2S,3S)- and (2S,3R)-flavan-3-ols.
CC   -!- The enzyme catalyzes sequential hydride transfers to C-2 and C-4,
CC       respectively.
CC   -!- Epimerization at C-3 is achieved by tautomerization that occurs
CC       between the two hydride transfers. cf. EC 1.3.1.77.
DR   Q7PCC4, ANRCH_VITVI;  Q5FB34, ANRCS_VITVI;  D7U6G6, ANRPN_VITVI;
//