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Literature summary for 1.21.3.6 extracted from

  • Nakayama, T.; Yonekura-Sakakibara, K.; Sato, T.; Kikuchi, S.; Fukui, Y.; Fukuchi-Mizutani, M.; Ueda, T.; Nakao, M.; Tanaka, Y.; Kusumi, T.; Nishino, T.
    Aureusidin synthase: a polyphenol oxidase homolog responsible for flower coloration (2000), Science, 290, 1163-1166.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
H2O2 activates oxidation of 2',4,4',6'-tetrahydroxychalcone Antirrhinum majus

Cloned(Commentary)

Cloned (Comment) Organism
gene AmAS1, DNA and amino acid sequence determination and analysis Antirrhinum majus

Inhibitors

Inhibitors Comment Organism Structure
H2O2 inhibits oxidation of 2',3,4,4',6'-pentahydroxychalcone Antirrhinum majus

Localization

Localization Comment Organism GeneOntology No. Textmining
vacuole
-
Antirrhinum majus 5773
-

Metals/Ions

Metals/Ions Comment Organism Structure
Cu2+ copper-containing enzyme, bound via histidine residues in the active site Antirrhinum majus

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
additional information
-
enzyme is processed to the mature from a 65 kDa precursor protein by cleavage of the N-terminal part Antirrhinum majus
39000
-
1 * 39000, SDS-PAGE Antirrhinum majus
40000
-
mature enzyme, gel filtration Antirrhinum majus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2',3,4,4',6'-pentahydroxychalcone + 1/2 O2 Antirrhinum majus
-
aureusidin + bracteatin + H2O
-
ir
2',4,4',6'-tetrahydroxychalcone + O2 Antirrhinum majus
-
aureusidin + H2O
-
ir
additional information Antirrhinum majus pathway, overview ?
-
?
additional information Antirrhinum majus enzyme plays a key role in the yellow coloration of flowers, enzyme is a homologue of plant polyphenol oxidase ?
-
?

Organism

Organism UniProt Comment Textmining
Antirrhinum majus
-
snapdragon
-
Antirrhinum majus
-
cv. Yellow Butterfly
-
Antirrhinum majus
-
gene AmAS1
-

Posttranslational Modification

Posttranslational Modification Comment Organism
glycoprotein
-
Antirrhinum majus

Purification (Commentary)

Purification (Comment) Organism
107fold Antirrhinum majus
to homogeneity Antirrhinum majus

Source Tissue

Source Tissue Comment Organism Textmining
flower
-
Antirrhinum majus
-
additional information analysis of spatial and temporal expression Antirrhinum majus
-
additional information not in stem and leaf Antirrhinum majus
-
petal enzyme expression Antirrhinum majus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
578
-
purified enzyme Antirrhinum majus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2',3,4,4',6'-pentahydroxychalcone + 1/2 O2
-
Antirrhinum majus aureusidin + bracteatin + H2O
-
ir
2',3,4,4',6'-pentahydroxychalcone + O2 best substrate Antirrhinum majus aureusidin + bracteatin + H2O products are formed in a 6:1 ratio ir
2',3,4,4',6'-pentahydroxychalcone + O2 2210% activity compared to 2',4,4',6'-tetrahydroxychalcone Antirrhinum majus aureusidin + bracteatin + H2O products are formed in a 6:1 ratio ir
2',3,4,4',6'-pentahydroxychalcone 4'-beta-D-glucopyranoside + O2
-
Antirrhinum majus aureusidin 6-beta-D-glucopyranoside + bracteatin 6-beta-D-glucopyranoside + H2O
-
ir
2',4,4',6'-tetrahydroxychalcone + O2
-
Antirrhinum majus aureusidin + H2O
-
ir
2',4,4',6'-tetrahydroxychalcone 4'-beta-D-glucopyranoside + O2
-
Antirrhinum majus aureusidin 6-beta-D-glucopyranoside + H2O
-
ir
additional information enzyme shows no 3',4'-dehydrogenase activity towards aureusidin Antirrhinum majus ?
-
?
additional information pathway, overview Antirrhinum majus ?
-
?
additional information enzyme plays a key role in the yellow coloration of flowers, enzyme is a homologue of plant polyphenol oxidase Antirrhinum majus ?
-
?

Subunits

Subunits Comment Organism
monomer 1 * 39000, SDS-PAGE Antirrhinum majus

Synonyms

Synonyms Comment Organism
More
-
-

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5 7 broad, formation of aureusidin from 2',3,4,4',6'-pentahydroxychalcone Antirrhinum majus
5.4
-
3-hydroxylation and cyclization of 2',4,4',6'-tetrahydroxychalcone Antirrhinum majus