The Enzyme Database

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EC 4.2.1.105     
Accepted name: 2-hydroxyisoflavanone dehydratase
Reaction: (1) 2,4′,7-trihydroxyisoflavanone = daidzein + H2O
(2) 2,4′,5,7-tetrahydroxyisoflavanone = genistein + H2O
For diagram of biochanin A biosynthesis, click here and for diagram of daidzein biosynthesis, click here
Glossary: daidzein = 4′,7-dihydroxyisoflavone
genistein = 4′,5,7-dihydroxyisoflavone
Other name(s): 2,7,4′-trihydroxyisoflavanone hydro-lyase; 2,7,4′-trihydroxyisoflavanone hydro-lyase (daidzein-forming)
Systematic name: 2,4′,7-trihydroxyisoflavanone hydro-lyase (daidzein-forming)
Comments: Catalyses the final step in the formation of the isoflavonoid skeleton. The reaction also occurs spontaneously.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 166800-10-8
References:
1.  Hakamatsuka, T., Mori, K., Ishida, S., Ebizuka, Y and Sankawa, U. Purification of 2-hydroxyisoflavanone dehydratase from the cell cultures of Pueraria lobata. Phytochemistry 49 (1998) 497–505.
[EC 4.2.1.105 created 2004, modified 2013]
 
 


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