Aureusidin synthase
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Aureusidin synthase (EC 1.21.3.6, AmAS1) is an enzyme with systematic name 2',4,4',6'-tetrahydroxychalcone 4'-O-beta-D-glucoside:oxygen oxidoreductase.[1][2][3][4]
Quick Facts Identifiers, EC no. ...
Aureusidin synthase | |||||||||
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Identifiers | |||||||||
EC no. | 1.21.3.6 | ||||||||
CAS no. | 320784-48-3 | ||||||||
Databases | |||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
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Aureusidin synthase has two main enzymatic tasks: hydroxylation at the 3-position on the B-ring of chalcones, and the oxidative cyclization of chalcones to form aurones.[2] The chalcones modified are typically glucosylated 2',4,4',6'-tetrahydroxychalcone (THC) and 2',3,4,4',6'-pentahydroxychalcone (PHC).[2] These aurones, particularly auresidin, form pigments for coloration in flowers.[1] These pigments may have been developed to attract and guide bees for pollination,[5] but they also provide protection from viruses, pests and fungus.[6]