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EC 1.14.14.81 Details
show Brenda entryEC number
1.14.14.81
Accepted name
flavanoid 3′,5′-hydroxylase
Reaction
a flavanone + 2 [reduced NADPH—hemoprotein reductase] + 2 O2 = a 3′,5′-dihydroxyflavanone + 2 [oxidized NADPH—hemoprotein reductase] + 2 H2O (overall reaction);;(1a) a flavanone + [reduced NADPH—hemoprotein reductase] + O2 = a 3′-hydroxyflavanone + [oxidized NADPH—hemoprotein reductase] + H2O;;(1b) a 3′-hydroxyflavanone + [reduced NADPH—hemoprotein reductase] + O2 = a 3′,5′-dihydroxyflavanone + [oxidized NADPH—hemoprotein reductase] + H2O
Other name(s)
flavonoid 3′,5′-hydroxylase
Systematic name
flavanone,[reduced NADPH—hemoprotein reductase]:oxygen oxidoreductase (3′,5′-dihydroxylating)
CAS registry number
94047-23-1
Comment
A cytochrome P-450 (heme-thiolate) protein found in plants. The 3′,5′-dihydroxyflavanone is formed via the 3′-hydroxyflavanone. In Petunia hybrida the enzyme acts on naringenin, eriodictyol, dihydroquercetin (taxifolin) and dihydrokaempferol (aromadendrin). The enzyme catalyses the hydroxylation of 5,7,4′-trihydroxyflavanone (naringenin) at either the 3′ position to form eriodictyol or at both the 3′ and 5′ positions to form 5,7,3′,4′,5′-pentahydroxyflavanone (dihydrotricetin). The enzyme also catalyses the hydroxylation of 3,5,7,3′,4′-pentahydroxyflavanone (taxifolin) at the 5′ position, forming ampelopsin.
History
created 2004 as EC 1.14.13.88, transferred 2018 to EC 1.14.14.81
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1 Oxidoreductases
1.1 Acting on the CH-OH group of donors
1.6.5.1 created 1961, deleted 1965 1.14.14.2 created 1972, deleted 1976 1.14.14.4 created 2000, deleted 2002
