1.21.3.6: aureusidin synthase
This is an abbreviated version!
For detailed information about aureusidin synthase, go to the full flat file.
Word Map on EC 1.21.3.6
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1.21.3.6
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yellow
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aurones
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flower
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snapdragon
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flavonoid
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majus
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antirrhinum
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ornamental
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polyphenol
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bright
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petal
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anthocyanin
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colour
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catechol
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oxidases
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cyclization
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vacuole
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cosmos
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agriculture
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nutrition
- 1.21.3.6
- yellow
-
aurones
- flower
- snapdragon
- flavonoid
- majus
-
antirrhinum
-
ornamental
- polyphenol
-
bright
- petal
- anthocyanin
-
colour
- catechol
- oxidases
-
cyclization
- vacuole
- cosmos
- agriculture
- nutrition
Reaction
Synonyms
AmAS1, AS1, aureusidin synthase, aurone synthase, More, synthase, aureusidin
ECTree
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Systematic Name
Systematic Name on EC 1.21.3.6 - aureusidin synthase
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2',4,4',6'-tetrahydroxychalcone 4'-O-beta-D-glucoside:oxygen oxidoreductase
A copper-containing glycoprotein that plays a key role in the yellow coloration of flowers such as Antirrhinum majus (snapdragon). The enzyme is a homologue of plant polyphenol oxidase [1] and catalyses two separate chemical transformations, i.e. 3-hydroxylation and oxidative cyclization (2',-dehydrogenation). H2O2 activates reaction (1) but inhibits reaction (2). Originally considered to act on the phenol but now thought to act mainly on the 4'-O-beta-D-glucoside in vivo [4].