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EC 1.3.1.112 Details
EC number
1.3.1.112
Accepted name
anthocyanidin reductase [(2S)-flavan-3-ol-forming]
Reaction
(1) a (2S,3R)-flavan-3-ol + 2 NADP+ = an anthocyanidin with a 3-hydroxy group + 2 NADPH + H+;;(2) a (2S,3S)-flavan-3-ol + 2 NADP+ = an anthocyanidin with a 3-hydroxy group + 2 NADPH + H+
Systematic name
(2S)-flavan-3-ol:NAD(P)+ oxidoreductase
Comment
The enzyme, characterized from Vitis vinifera (grape), participates in the flavonoid biosynthesis pathway. It catalyses the double reduction of anthocyanidins, producing a mixture of (2S,3S)- and (2S,3R)-flavan-3-ols. The enzyme catalyses sequential hydride transfers to C-2 and C-4, respectively. Epimerization at C-3 is achieved by tautomerization that occurs between the two hydride transfers. cf. EC 1.3.1.77, anthocyanidin reductase [(2R,3R)-flavan-3-ol-forming].
History
created 2016
EC Tree
1.1.3.1 created 1961, deleted 1984
1.1.3.22 created 1961 as EC 1.2.3.2, transferred 1984 to EC 1.1.3.22, modified 1989, deleted 2004
1.1.3.25 created 1986, deleted 2005
1.1.3.26 created 1989, deleted 2002
1.1.3.31 created 1992, deleted 2003
1.1.3.32 created 1999, deleted 2002
1.1.3.33 created 1999, deleted 2002
1.1.3.34 created 1999, deleted 2002
1.1.3.35 created 1999, deleted 2002
1.1.3.36 created 1999, deleted 2002
1.1.99.15 created 1978, deleted 1980
1.1.99.17 created 1982, deleted 2003
1.3.1.23 created 1972, deleted 2005
1.3.1.50 created 1992, deleted 1999
1.3.1.55 created 1999, deleted 2004